International Consensus Statement on Obstructive Sleep Apnea

In the paper

“large studies failed to detect significant differences in symptoms or clinical outcomes between patients with REM-related (or REM-predominant) versus non-REM-related OSA.50,60–62”

What the sources say

• ?Not checked — no full text of the sourcecites [50] source
• Disputed

  The Discussion (page unavailable) reports different findings for REM and non-REM sleep-disordered breathing: REM-related breathing was not associated with sleepiness or poorer quality of life, whereas non-REM-related breathing was associated with both. It says the two should be distinguished in managing patients with daytime sleepiness, rather than concluding that the large study found no clinical distinction. The paper does not establish whether broader outcomes, such as cardiovascular outcomes, differ. (LLM, conf=0.83)

  Checked by a reasoning model — may be wrong.

  cites [60] sourceExperimental — accuracy not yet measured
• Partly supported

  The Results report no significant variation in sleepiness or most quality-of-life measures across REM-predominant OSA categories, supporting part of the claim. But they also report poorer objectively measured sleep quality and worse self-perceived health at AHI-REM ≥ 30. The study does not establish the claim's broad comparison between patients with REM-related and non-REM-related OSA. (LLM, conf=0.86)

  cites [61] sourceExperimental — accuracy not yet measured
• Partly supported

  The Abstract reports similar baseline symptom and functional-outcome scores in 330 patients with REM-related versus other OSA, as well as similar changes after PAP treatment. But the Results report a higher prevalence of depression and cardiovascular disease in the non-REM-restricted group, so the claim is too broad if it includes all clinical outcomes. (LLM, conf=0.84)

  cites [62] sourceExperimental — accuracy not yet measured

In the paper

“Some data suggest that a low arousal threshold may be a risk factor for failure of UA surgery to achieve a surgical cure.”

What the sources say

• Disputed

  The “Modeling Response to Surgery” section says low arousal threshold was correlated with better surgical outcome, not failure to achieve a cure. The “Baseline Loop Gain, Arousal Threshold and Surgical Outcome” section likewise reports an association with lower postoperative AHI. Page numbers are unavailable in our copy. (LLM, conf=0.91)

  Checked by a reasoning model — may be wrong.

  cites [363] sourceExperimental — accuracy not yet measured
• ?Could not verify

  The Summary of the Findings discusses variable surgical success and identifies high loop gain as a possible contributor to poor response. The Results report surgical outcomes, but neither section links a low arousal threshold to failure to achieve a cure; searches for “low arousal threshold” and “arousal threshold” found no such finding in our copy. Page numbers were unavailable. (LLM, conf=0.74)

  cites [364] sourceExperimental — accuracy not yet measured
• Partly supported

  The Introduction (page unavailable) says a low arousal threshold might predispose patients to repetitive apnea rather than stable breathing. That supports the proposed physiological risk, but the paper does not address whether a low threshold predicts failure of upper-airway surgery to achieve a cure. (LLM, conf=0.78)

  cites [416] sourceExperimental — accuracy not yet measured

In the paper

“In general, increasing frequency of each symptom occurs with increasing AHI and OSA severity.”

What the sources say

• ?Not checked — no full text of the sourcecites [88] source
• Supported

  Table 1 shows that reported snoring, tiredness or sleepiness, and witnessed breathing pauses are more prevalent in groups with more severe sleep-disordered breathing. The Methods define those severity groups by the hourly rate of apneas and hypopneas, which the paper calls RDI rather than AHI. (LLM, conf=0.86)

  cites [456] source
• Disputed

  The Clinical Implications section says symptom–severity dissociation is prominent in OSA patients, contrary to the claimed general increase in symptoms with severity. The Database section also says the questionnaire did not measure symptom frequency and the analysis did not subdivide OSA by severity category. Page numbers are unavailable in our copy. (LLM, conf=0.85)

  Checked by a reasoning model — may be wrong.

  cites [505] sourceExperimental — accuracy not yet measured

In the paper

“There is increasing evidence supporting the use of some home-based type III and IV type sleep studies to “rule-in” but not “rule-out”580 moderate to severe OSA.”

What the sources say

• Disputed

  The Discussion (page not available) states that home respiratory polygraphy can both exclude and confirm sleep apnoea–hypopnoea syndrome. The Diagnostic efficacy section likewise reports cut-offs that effectively excluded it, including at a polysomnographic AHI threshold of 15. Although the Introduction describes a recommendation to follow a negative home test with polysomnography, the paper’s own findings contradict the claim that these studies can rule in but not rule out disease; it studies type III monitoring, not type IV. (LLM, conf=0.88)

  Checked by a reasoning model — may be wrong.

  cites [580] sourceExperimental — accuracy not yet measured

In the paper

“In addition, the onset of MI is more likely to be during the nighttime.666”

What the sources say

• Disputed

  The Discussion says nighttime MI onset is increased in patients with obstructive sleep apnea compared with patients without it. It also says patients without sleep apnea have a nighttime nadir and a morning peak, like the general population. The unqualified claim that MI onset is more likely at night therefore reverses the paper’s general finding. (LLM, conf=0.88)

  Checked by a reasoning model — may be wrong.

  cites [666] sourceExperimental — accuracy not yet measured

In the paper

“with significant improvement in subjective sleep quality after medical and surgical treatment.914–916”

What the sources say

• ?Not checked — no full text of the sourcecites [914] source
• ?Not checked — no full text of the sourcecites [915] source
• Disputed

  The Treatment: Medical vs. Surgical discussion reports significant improvement in subjective sleep-quality scores after surgery, but says scores among patients receiving medical management worsened. Thus the review does not support significant improvement after either treatment. (LLM, conf=0.88)

  Checked by a reasoning model — may be wrong.

  cites [916] sourceExperimental — accuracy not yet measured

In the paper

“which have been associated with sleep fragmentation and overall poor sleep quality.927,930,936”

What the sources say

• ?Not checked — no full text of the sourcecites [927] source
• ?Not checked — no full text of the sourcecites [930] source
• Disputed

  The Results (page not provided) report that arousal indexes in the 15-, 30-, and 45-minute periods around reflux episodes were lower than the full-night arousal index, contrary to the attributed association with sleep fragmentation. The paper does not report a measure of overall sleep quality, so it cannot establish that part of the claim. (LLM, conf=0.84)

  Checked by a reasoning model — may be wrong.

  cites [936] sourceExperimental — accuracy not yet measured

In the paper

“Data were insufficient to perform analyses examining differences in QOL or interface-associated side effects.”

What the sources say

• Disputed

  The Mask Selection section (page unavailable) reports analyses of both outcomes: studies found no clinically significant QOL difference between intranasal and nasal interfaces, and fewer side effects with nasal than with oronasal or oral interfaces. It therefore contradicts the claim that data were insufficient to analyze QOL or interface-associated side effects. (LLM, conf=0.88)

  Checked by a reasoning model — may be wrong.

  cites [39] sourceExperimental — accuracy not yet measured

In the paper

“Individuals with OSA who report daytime sleepiness appear to demonstrate greater decline in BP compared to those who are not sleepy.39,1211”

What the sources say

• Partly supported

  In the PAP Therapy section (page unavailable), the guideline reports blood-pressure reductions with PAP in patients with OSA and hypertension. It says sleepy patients may be more accepting of PAP and may receive blood-pressure benefits, but it does not report a greater blood-pressure decline in sleepy than in non-sleepy patients. (LLM, conf=0.84)

  cites [39] sourceExperimental — accuracy not yet measured
• Disputed

  In the Subgroup Analyses (Table 3; page not provided), the group with lower Epworth Sleepiness Scale scores (<10) had a larger 24-hour diastolic BP reduction with CPAP than the group with higher scores (≥10): −3.24 versus −2.44 mm Hg. This is the opposite of the claimed direction, although the table does not establish a statistically significant difference between the subgroups. (LLM, conf=0.86)

  Checked by a reasoning model — may be wrong.

  cites [1211] sourceExperimental — accuracy not yet measured

In the paper

“A series of calibration equations were published to allow imputation of AHI levels across definitions.14”

What the sources say

• Supported

  The Methods describe regression models relating pairs of AHI measures, and the Results give a predicted AHI3 value from an AHI4 value. The Discussion says the models can calibrate AHI values across different hypopnea definitions, supporting the claim’s description of their purpose. (LLM, conf=0.88)

  cites [14] source

In the paper

“In a cross-sectional analysis of the community-based general population, HypnoLaus cohort, adjusted thresholds for defining moderate and severe OSA were shown to associate with both hypertension and diabetes.”

What the sources say

• Supported

  The Statistical analysis section (page unavailable) describes estimating equivalent AHI thresholds across three hypopnea-scoring criteria and identifying thresholds significantly associated with hypertension and diabetes. It also describes testing associations between OSA severity, including moderate and severe OSA, and those conditions in the HypnoLaus cohort. (LLM, conf=0.84)

  cites [16] source

In the paper

“In the Sleep Heart Health Study (SHHS), the application of the current AASM recommended definition (3% desaturation or arousal) resulted in an approximately doubling of the number of individuals classified with moderate OSA (AHI > 15).”

What the sources say

• Supported

  The Discussion reports that 17.7% of participants had moderate-to-severe OSA under the 4%-desaturation definition, compared with 43.5% under the AASM 3%-desaturation-or-arousal definition. That is about 2.5 times as many, consistent with the claim’s approximate doubling, although the paper calls the group moderate-to-severe rather than moderate alone. The Introduction identifies the cohort as the Sleep Heart Health Study; page numbers are unavailable in our copy. (LLM, conf=0.86)

  cites [17] source

In the paper

“Specifically, this study suggested that the thresholds for defining disease severity need to be reduced by approximately one half for hypopnea definitions using a 4% desaturation criteria compared to the AASM hypopnea definition.16”

What the sources say

• Partly supported

  The Scoring of polysomnography section identifies the stricter AASM2007 definition as requiring at least 4% oxygen desaturation. The Discussion says AASM2012 criteria produce higher AHI values and approximately twice as many OSA diagnoses, while Statistical analysis says the authors estimated equivalent AHI thresholds. The passages retrieved do not establish that disease-severity thresholds under the 4% definition should be reduced by approximately one half. (LLM, conf=0.75)

  cites [16] sourceExperimental — accuracy not yet measured

In the paper

“For example, in the unattended PSGs in the SHHS, events were more reliably scored when desaturation criteria alone were used in comparison to inclusion of the arousal criteria.23”

What the sources say

• Supported

  The Discussion reports that, in unattended SHHS polysomnograms, RDI reliability was lower when events qualified through either desaturation or arousal than when desaturation alone was required. The comparison concerns reliability of the resulting respiratory disturbance index. (LLM, conf=0.94)

  cites [23] source

In the paper

“but with aging, may experience increased rates of death and incident heart failure (HF).19”

What the sources say

• Partly supported

  The Results (page unavailable) report that, over 13.6 years, greater obstructive sleep apnea severity was associated with the combined outcome of incident heart failure or death in women. The paper does not establish that aging itself increases those rates, and it reports the two outcomes as a composite rather than demonstrating an increase in each separately. (LLM, conf=0.85)

  cites [19] sourceExperimental — accuracy not yet measured

In the paper

“In REM, the genioglossus muscle activity is lower,47”

What the sources say

• Supported

  The Discussion (page not specified in our copy) reports diminished genioglossus activity during REM, particularly phasic REM. The paper also reports lower single-motor-unit firing rates in phasic REM than in stage N2. (LLM, conf=0.94)

  cites [47] source

In the paper

“It has been shown that more hypoxemia as measured by T90 and lower SaO2 nadir in those with similar AHI is associated with more inflammation (measured by C-reactive protein [CRP], platelet count, and endothelial stiffness).28–30”

What the sources say

• ?Not checked — no full text of the sourcecites [28] source
• Partly supported

  The Discussion reports an association between nocturnal intermittent hypoxia, measured by 3% oxygen desaturation index, and higher hs-CRP in middle-aged community residents. The paper does not establish the claimed association using T90 or SaO2 nadir among people with similar AHI, and it does not report platelet count or endothelial stiffness as inflammation outcomes. Page numbers were not available in our copy. (LLM, conf=0.88)

  cites [29] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [30] source

In the paper

“Conversely, the ODI may be particularly useful to identify hypoxia-related stresses, which have been related to metabolic disease.16”

What the sources say

• Partly supported

  The Introduction and Scoring of polysomnography sections link hypopnea definitions involving oxygen desaturation to the study of diabetes and metabolic syndrome. The ODI table defines ODI as the oxygen desaturation index, but the passage evaluates its association with sleepiness, not metabolic outcomes. Our copy therefore supports the desaturation and metabolic-disease connection only indirectly; it does not establish that ODI is particularly useful for identifying metabolic-disease-related stresses. (LLM, conf=0.70)

  cites [16] sourceExperimental — accuracy not yet measured

In the paper

“Daytime impairment in functioning tends to be worse in patients with UARS compared to those with mild OSA.74,76”

What the sources say

• ?Not checked — no full text of the sourcecites [74] source
• Supported

  The Discussion reports that UARS patients had impaired daytime quality of life and more complaints related to daytime function than patients with mild OSA. It specifically identifies worse productivity, social outcomes, activity levels, and vigilance in the UARS group. (LLM, conf=0.94)

  cites [76] source

In the paper

“There is a very high prevalence of OSA in those with CAD, hypertension, HF, arrhythmias, and especially AF.109–112”

What the sources say

• ?Not checked — no full text of the sourcecites [109] source
• ?Not checked — no full text of the sourcecites [110] source
• Partly supported

  The Abstract and Introduction (page numbers unavailable) say OSA is common in patients with cardiovascular disease and highly prevalent among cardiology patients; they also link it to coronary disease, heart failure, and atrial fibrillation. They do not establish high OSA prevalence separately in every listed group, particularly people with hypertension or arrhythmias, or say prevalence is especially high in atrial fibrillation. (LLM, conf=0.84)

  cites [111] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [112] source

In the paper

“A more recent population-based study in Switzerland found a very high prevalence: 23% in women and 50% in men.97”

What the sources say

• Supported

  The Methods identify HypnoLaus as a population-based study in Lausanne, Switzerland. The Findings report 23.4% of women and 49.7% of men, matching the rounded figures in the claim. These figures specifically describe moderate-to-severe sleep-disordered breathing (apnoea–hypopnoea index ≥15 events per hour). (LLM, conf=0.94)

  cites [97] source

In the paper

“A recent MA estimated 49% of subjects hospitalized with cardiac disease (HF, acute coronary syndrome, and arrhythmias) had previously undiagnosed OSA.108”

What the sources say

• Partly supported

  Results §3.2 reports a pooled OSA prevalence of 48% among hospitalized cardiac patients; 49% applies specifically to the acute coronary syndrome subgroup, not to all the cardiac conditions listed. Results §3.1 includes one study of patients with cardiovascular disease such as new arrhythmias, but gives no separate arrhythmia estimate. Discussion §5.1 says the pooled figure may estimate previously undiagnosed OSA because diagnosis occurred after admission, rather than establishing that all cases were previously undiagnosed. (LLM, conf=0.90)

  cites [108] sourceExperimental — accuracy not yet measured

In the paper

“The 4% desaturation criteria for hypopneas (≥4% oxygen desaturation) may be associated with a more cohesive group epidemiologically – typically older, male, obese, and with underlying cardiac disease (e.g., HF, coronary artery disease [CAD], and atrial fibrillation [AF]) or diabetes.”

What the sources say

• ?Could not verify

  The Subjects section says participants were otherwise healthy, and Table 1 in Patients with OSA versus Control Subjects reports age, sex, and BMI. Neither passage links those characteristics—or cardiac disease or diabetes—to a ≥4% desaturation criterion for hypopneas. Searches for the criterion and the listed comorbidities found no passage addressing the claimed epidemiologic group; page numbers were unavailable in our copy. (LLM, conf=0.75)

  cites [36] sourceExperimental — accuracy not yet measured

In the paper

“However, in obese individuals referred to sleep clinics, prevalence rate increases to 10%–20%.84,85”

What the sources say

• Partly supported

  The Discussion (page unavailable) reports that previous studies found OHS prevalence of 9–20% among patients with obstructive sleep apnea, broadly matching the quoted range. But that evidence concerns patients with OSA, not all obese individuals referred to sleep clinics; this study itself found 8.5% among its clinic patients with OSA. (LLM, conf=0.86)

  cites [84] sourceExperimental — accuracy not yet measured
• Partly supported

  The Introduction reports a 17% aggregate OHS prevalence among patients with obstructive sleep apnea (OSA) referred to a sleep disorder center, consistent with the claimed 10%–20% range. The estimate is for patients with OSA, however, not all obese individuals referred to sleep clinics; the reported prevalence across studies also ranges from 4% to 50%. (LLM, conf=0.84)

  cites [85] sourceExperimental — accuracy not yet measured

In the paper

“A smaller subset, 3%–7% in men and 2%–5% in women, had OSAS based on AHI ≥ 5 with excessive daytime sleepiness.88,90,92”

What the sources say

• ?Not checked — no full text of the sourcecites [88] source
• Partly supported

  The Occurrence of Hypersomnolence section (p. 3) estimates that 4% of men and 2% of women had both an apnea-hypopnea score of at least 5 and self-reported hypersomnolence. The paper supports the criterion and estimates within the quoted ranges, but it does not report the ranges of 3%–7% for men and 2%–5% for women. (LLM, conf=0.88)

  cites [90] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [92]

In the paper

“These studies found a general prevalence of 24% in men, 9% in women using the alternative definition of hypopnea (≥4% oxygen desaturation).”

What the sources say

• Partly supported

  The Occurrence of Hypersomnolence (p. 3) gives prevalence estimates of 24% for men and 9% for women with an apnea-hypopnea score of at least 5. Interpretation of Polysomnographic Data (p. 2) defines hypopnea using a decrease of at least 4% in oxyhemoglobin saturation. These are estimates for middle-aged adults from the Wisconsin Sleep Cohort; this paper does not report an SHHS finding or establish prevalence for the general population. (LLM, conf=0.87)

  cites [90] sourceExperimental — accuracy not yet measured
• ?Could not verify

  The Abstract reports OSA prevalence of 4% in men and 2% in women, not the claimed 24% and 9%; those figures may concern a different definition, so this is not a direct contradiction. The Home polysomnography section describes SHHS hypopnea scoring but does not report prevalence using a ≥4% oxygen-desaturation threshold. Searches for the claimed percentages and the Wisconsin cohort did not locate that finding in our copy. (LLM, conf=0.76)

  cites [91] sourceExperimental — accuracy not yet measured

In the paper

“Several groups have reported an increased frequency of non-specific or functional somatic complaints in patients with UARS, compared to OSA patients including irritable bowel, insomnia, difficulty concentrating, cognitive problems, depression, and poor psychomotor performance.77–79”

What the sources say

• ?Not checked — no full text of the sourcecites [77] source
• ?Not checked — no full text of the sourcecites [78] source
• Partly supported

  The Introduction reports prior studies finding more insomnia, symptoms resembling functional somatic syndromes, and impaired psychomotor performance in UARS than OSAS. The Discussion reports more somatic symptoms and higher depression scores in UARS. Our copy does not specifically establish the claimed comparisons for irritable bowel, difficulty concentrating, or cognitive problems. (LLM, conf=0.88)

  cites [79] sourceExperimental — accuracy not yet measured

In the paper

“Residing in less favorable walking environments has been associated with more severe sleep apnea especially in male and obese individuals.124”

What the sources say

• Supported

  The Discussion states that living in the least walkable neighborhoods was associated with greater OSA severity, specifically in male and obese subjects. The Results passage also reports a greater apnea-hypopnea index in the lowest walking-environment quartile and stronger associations in those groups. (LLM, conf=0.95)

  cites [124] source

In the paper

“Trials enrolling obese diabetics have found that 86% have some degree of OSA.122”

What the sources say

• Supported

  The Conclusions section reports an 86% rate of OSA among obese patients with type 2 diabetes seeking to lose weight. The paper cites an earlier study for that figure, but reports and relies on the finding itself. (LLM, conf=0.92)

  cites [122] source

In the paper

“Stroke has been consistently identified as a devastating outcome of untreated severe OSA, especially in middle aged adults.120”

What the sources say

• Supported

  The Statements in section 1.1.3 say that untreated severe OSA doubles the risk of incident stroke and that this risk is especially relevant in young to middle-aged patients. The Overview of the evidence in section 1.1.2 reports increased stroke risk across six systematic reviews with meta-analyses. (LLM, conf=0.94)

  cites [120] source

In the paper

“Neighborhood disadvantage, living in poor residential areas, has been associated with childhood sleep apnea in several epidemiological studies.125,126”

What the sources say

• ?Not checked — no full text of the sourcecites [125] source
• Supported

  The paper’s Abstract reports two earlier studies linking disadvantaged neighborhoods with childhood obstructive sleep apnea. Its own six-city analysis also found higher neighborhood poverty rates associated with greater apnea severity, as stated in the Abstract and Conclusions. (LLM, conf=0.93)

  cites [126] source

In the paper

“For example, Guest et al. estimated that cost savings exceeded the costs of treating OSA after 13 years.141”

What the sources say

• Supported

  The Expected healthcare costs section says that cumulative NHS costs for CPAP-treated patients become lower than those for untreated patients by the 13th year. The claim accurately paraphrases that modeled cost crossover for severe OSAHS in the UK. (LLM, conf=0.94)

  cites [141] source

In the paper

“Most population-based studies show a two- to threefold greater prevalence of OSA among men compared to women.18,45,90,93,96,99,104,144–156”

What the sources say

• ?Not checked — no full text of the sourcecites [18] source
• ?Not checked — no full text of the sourcecites [45] source
• Supported

  This population-based study reports that men were 2.0 to 3.7 times as likely as women to have sleep-disordered breathing (Prevalence of Sleep-Disordered Breathing, p. 3). Its Risk Factors section (p. 5) summarizes the male-to-female prevalence ratio as approximately 3:1, supporting its use as an example of the cited pattern. (LLM, conf=0.90)

  cites [90] source

In the paper

“Some of the cost advantage with use of home sleep testing ($167 vs. $782 for lab study) was offset by the need for additional testing in some patients who have failed or had non-diagnostic home studies.138”

What the sources say

• Supported

  The Payer Perspective section reports a $166.95 default home pathway and a $1,564.96 laboratory pathway comprising two PSG studies—approximately $782 per study. It says the home arm’s cost advantage narrowed partly because 74 patients obtained confirmatory laboratory studies and technical failures required repeat testing. The Study Design section also specifies that technically unacceptable or negative home studies could lead to additional testing; page numbers are unavailable in our copy. (LLM, conf=0.87)

  cites [138] source

In the paper

“Post-menopausal women, and particularly those not on hormone-replacement therapy, are at increased risk for OSA compared to pre-menopausal women, even when correcting for age.99,144,147,154”

What the sources say

• ?Not checked — no full text of the sourcecites [99] source
• ?Not checked — no full text of the sourcecites [144] source
• Partly supported

  The paper’s introductory passage reports that OSA incidence increases after menopause and says some, but not all, studies suggest an inverse association with hormone therapy. Its own analysis, reported in the Abstract and “Type of menopause and OSA risk” section, compares surgical with natural menopause among postmenopausal women and finds a stronger association in women who never used hormone therapy. It does not establish the claimed age-adjusted comparison of postmenopausal with premenopausal women; no page numbers are provided in our copy. (LLM, conf=0.86)

  cites [147] sourceExperimental — accuracy not yet measured

In the paper

“A study by Sands et al. showed that obese patients with OSA compared to those without OSA have worse pharyngeal collapsibility with less active pharyngeal muscle response.204”

What the sources say

• Supported

  The Discussion reports that overweight/obese individuals without apnea had lower Pcrit, indicating less pharyngeal collapsibility, and approximately three times greater pharyngeal muscle responsiveness than their counterparts with OSA. Both comparisons support the citing sentence. (LLM, conf=0.94)

  cites [204] source

In the paper

“Obesity, specifically central adiposity, increases pharyngeal collapsibility that causes recurrent episodes of UA obstruction in sleep apnea through both mechanical and neuromuscular effects.199–203”

What the sources say

• ?Not checked — no full text of the sourcecites [199] source
• ?Not checked — no full text of the sourcecites [200] source
• Partly supported

  The Introduction and Discussion (page not specified) describe pharyngeal collapse in sleep apnea as involving airway anatomy and dilator-muscle activity, supporting the mechanical and neuromuscular portion of the claim. The Methods compare patients with obese, size-matched controls, but the paper does not establish that obesity—specifically central adiposity—increases collapsibility or causes recurrent obstruction. (LLM, conf=0.86)

  cites [201] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [202] source
• ?Not checked — no full text of the sourcecites [203] source

In the paper

“Obesity174 and fat distribution175,176 differentially affect men and women’s propensity for OSA.”

What the sources say

• Supported

  Citation 174 is attached to obesity, while separate citations support fat distribution. The Discussion reports that OSA severity rose more with BMI in men than in women and concludes that obesity may play a more significant role in male patients. (LLM, conf=0.90)

  cites [174] source
• ?Not checked — no full text of the sourcecites [175] source
• ?Not checked — no full text of the sourcecites [176] source

In the paper

“Another study showed an increase in BMI by 1 standard deviation (SD) was associated with a threefold increase in risk of OSA.90”

What the sources say

• Partly supported

  The Risk Factors discussion (p. 5) describes a threefold increase for a one-SD increment in any measure of body habitus. But Table 5 (p. 5) gives the BMI-specific odds ratio as 4.17, not threefold, for sleep-disordered breathing defined by an apnea-hypopnea score of at least 5. (LLM, conf=0.88)

  cites [90] sourceExperimental — accuracy not yet measured

In the paper

“Obesity is one of the most significant risk factors for SDB.95,156,189,190”

What the sources say

• Supported

  The paper's introduction calls overweight and obesity the most important modifiable causes of SDB in adults. The Results also report substantially higher SDB prevalence among participants with higher BMIs. Together, these passages support describing obesity as one of the most significant risk factors. (LLM, conf=0.95)

  cites [95] source
• ?Not checked — no full text of the sourcecites [156] source
• ?Not checked — no full text of the sourcecites [189] source

In the paper

“Facial anatomical distinctions, such as mandible position, impart different degrees of risk in men and women.168,169”

What the sources say

• Supported

  The Discussion reports that posterior mandible position in women with OSA correlated with apnea severity. The Conclusion identifies different anatomical factors involved in OSA in men and women, including retrognathia in women. The supplied copy gives section labels but no page numbers. (LLM, conf=0.91)

  cites [168] source
• Partly supported

  The Results report that mandibular plane angle had a different association with OSA in women and men, supporting a sex-related difference in craniofacial features associated with OSA. But the Discussion says mandibular depth angle—more directly a measure of mandibular position—was associated with OSA regardless of sex. The study reports associations, not that these features cause different degrees of risk. (LLM, conf=0.84)

  cites [169] sourceExperimental — accuracy not yet measured

In the paper

“Moreover, characteristics of the sleep study in OSA such as AHI, event duration, and measures of oxygen desaturation during sleep are heritable.252”

What the sources say

• Supported

  The Methods (page not provided) identify AHI, respiratory event duration, and two measures of overnight oxygen saturation as sleep-study traits. The Results (page not provided) report that all individual traits were heritable in the African American group and all except habitual snoring were heritable in the European American group. (LLM, conf=0.94)

  cites [252] source

In the paper

“Obesity plays a major role.90”

What the sources say

• Supported

  The Risk Factors section (p. 5) says obesity is an important risk factor for sleep apnea in adults aged 30–60 and concludes that it has an important role in sleep-disordered breathing. The Obesity and Sleep-Disordered Breathing section (p. 4) also reports a significant association across measures of obesity. (LLM, conf=0.94)

  cites [90] source

In the paper

“as is cardiopulmonary coupling,254 a measure of sleep depth.255”

What the sources say

• Supported

  The paper reports that e-LFC, a measure of cardiopulmonary coupling during sleep, had an age- and sex-adjusted heritability estimate of approximately 0.30. The separate description of cardiopulmonary coupling as a measure of sleep depth is attached to citation 255, not this source. (LLM, conf=0.90)

  cites [254] source
• Partly supported

  The cited paper supports the description of high-frequency cardiopulmonary coupling as a sleep-related measure: its Abstract reports a correlation with EEG delta power and calls it a biomarker of stable sleep. It does not establish cardiopulmonary coupling generally as a measure of sleep depth. The heritability statement is attached to a different citation and is not judged here. (LLM, conf=0.82)

  cites [255] sourceExperimental — accuracy not yet measured

In the paper

“Extreme phenotypes have been demonstrated.256”

What the sources say

• Supported

  The Discussion states that the authors established OSA extreme-phenotype definitions and identified extreme cases and controls across racial groups. The Conclusions report that these definitions were established in a large worldwide sample and applied to a prospectively collected sample. (LLM, conf=0.93)

  cites [256] source

In the paper

“They have also shown that parapharyngeal fat deposition in the subglosso-supraglottic area is associated with increased OSA severity independent of BMI or neck circumference.209,210”

What the sources say

• ?Not checked — no full text of the sourcecites [209] source
• Supported

  The Abstract reports that subglosso-supraglottic parapharyngeal fat pad area was independently associated with apnea-hypopnea index after accounting for BMI. The Discussion (page not provided) explicitly describes this parameter as independent of both BMI and neck circumference and associated with OSA severity. (LLM, conf=0.94)

  cites [210] source

In the paper

“It has been known for over two decades that OSA aggregates in families.”

What the sources say

• ?Not checked — no full text of the sourcecites [245] source
• ?Not checked — no full text of the sourcecites [246] source
• Supported

  The Abstract reports a significantly increased frequency of abnormal breathing during sleep among first-degree relatives of non-obese patients with sleep apnoea/hypopnoea syndrome. The Discussion likewise reports that 10 of 40 relatives had more than 15 apnoeas and hypopnoeas per hour, supporting the statement that the condition aggregates in families. (LLM, conf=0.92)

  cites [247] source

In the paper

“Heart rate response to arousal is also heritable253”

What the sources say

• Supported

  The Conclusion/Discussion states that genetic factors significantly influence heart rate response to arousal and reports heritable components of the overall average response and the arousal-intensity threshold for a response. The study examined arousals during sleep in twins without sleep disorders. (LLM, conf=0.94)

  cites [253] source

In the paper

“Further evidence that obesity is pathogenic in OSA for some individuals, is that weight loss results in marked improvement of OSA.122,214”

What the sources say

• Supported

  The Results report that weight loss significantly improved OSA, with more than three times as many participants achieving remission in the intervention group as in the comparison group. The Conclusions describe the improvements as clinically relevant in obese patients with type 2 diabetes. This supports the citing sentence’s qualified claim that weight loss can markedly improve OSA for some individuals. (LLM, conf=0.92)

  cites [122] source
• ?Not checked — no full text of the sourcecites [214] source

In the paper

“Dental findings may also be suggestive of underlying craniofacial deficiency and include: open bite, overbite, overjet, and proclination of the mandibular incisors.219,234,237”

What the sources say

• ?Not checked — no full text of the sourcecites [219] source
• ?Not checked — no full text of the sourcecites [234] source
• Partly supported

  The Discussion (page unavailable) reports that deep overbite and severe overjet were more prevalent in patients with OSAS than in the general Japanese population, and suggests a role for abnormal craniofacial anatomy. It does not identify open bite or proclination of the mandibular incisors as findings; its mention of protruding teeth concerns the maxillary anterior teeth. (LLM, conf=0.88)

  cites [237] sourceExperimental — accuracy not yet measured

In the paper

“There are also multiple physiological traits that determine risk for the disorder.36,257,258”

What the sources say

• Supported

  The Summary states that upper-airway collapsibility, muscle responsiveness, arousal threshold, and loop gain interact to determine the presence or absence of OSA and its severity. “What This Study Adds to the Field” also describes OSA’s causes as multifactorial, directly supporting the claim. (LLM, conf=0.94)

  cites [36] source
• Supported

  The Discussion states that pharyngeal collapsibility is only one of several components contributing to OSA and that different combinations of traits can cause or prevent it. This directly supports the claim that multiple physiological traits determine OSA risk. (LLM, conf=0.94)

  cites [257] source
• ?Not checked — no full text of the sourcecites [258] source

In the paper

“Genome-wide studies263–265 have largely focused on quantitative variables obtained from the sleep study to characterize SDB that were shown to be heritable.252”

What the sources say

• Supported

  The Abstract says prior genetic studies focused on traits defined using the apnea–hypopnea index (AHI). The Introduction identifies AHI as a sleep-apnea severity measure and reports its heritability (h² = 0.37); the paper also describes its own genome-wide study of quantitative sleep-apnea traits. (LLM, conf=0.90)

  cites [263] source
• Supported

  The Background (page unavailable) describes this as a genome-wide analysis of objectively measured SDB indices and lists five quantitative measures from overnight sleep recordings. It also notes that several earlier genome-wide studies of SDB traits had been reported. The separate citation 252, rather than this paper, is attached to the heritability clause. (LLM, conf=0.88)

  cites [264] source
• Supported

  The Introduction (p. 9) says the authors conducted genome-wide association studies of AHI, including measures calculated separately for REM and non-REM sleep. The Discussion (p. 15) describes these as analyses of quantitative sleep data. The separate citation 252, not this source, is attached to the heritability statement. (LLM, conf=0.92)

  cites [265] source
• Supported

  The Results (page unavailable) report that the sleep-apnea traits were heritable in the African-American and European-American families studied, including AHI and measures of oxygen saturation and respiratory-event duration. The Methods (page unavailable) identify these quantitative measures as obtained from overnight sleep studies. This supports the heritability point attributed to citation 252; the separate claim about what genome-wide studies have focused on is attached to citations 263–265. (LLM, conf=0.91)

  cites [252] source

In the paper

“Variants in the interleukin 18 receptor and hexokinase genes were associated with oxygen desaturation measures during sleep.269”

What the sources say

• Supported

  The Discussion states that the study identified and replicated variants in the hexokinase 1 (HK1) and interleukin 18 receptor (IL18R1) regions associated with oxyhemoglobin saturation traits measured during sleep. These are the sleep-related oxygen measures described in the claim. (LLM, conf=0.93)

  cites [269] source

In the paper

“A genome-wide study that specifically examined both common and rare variants by whole genome sequencing264 identified novel rare variants associations with measures of desaturation, that is, ARMCX3, MRPS33, and C16orf90.”

What the sources say

• Supported

  The Methods (WGS and genotyping; page unavailable) describe whole-genome sequencing, and the Results distinguish rare-variant gene-based findings from common-variant single-variant findings. The Results (Gene-based results; page unavailable) associate ARMCX3 with average desaturation and MRPS33 and C16orf90 with Per90 in population-specific analyses. (LLM, conf=0.92)

  cites [264] source

In the paper

“but the role of nasal obstruction as a contributing factor in the pathogenesis of OSA and SDB is controversial.276–278”

What the sources say

• Supported

  The Introduction explicitly says that nasal obstruction has been proposed as a contributing factor in OSA pathogenesis “despite numerous controversies.” The Discussion also addresses the relationship between nasal congestion and sleep-disordered breathing (SDB), making the citing sentence a fair broad paraphrase. (LLM, conf=0.90)

  cites [276] source
• Supported

  The section on clinical and experimental evidence describes conflicting study results on whether nasal obstruction is associated with OSA and SDB. It concludes that obstruction is associated with mild SDB but is not the main contributing factor for most patients with moderate to severe OSA, supporting the claim that its role is controversial. (LLM, conf=0.91)

  cites [277] source
• ?Not checked — no full text of the sourcecites [278] source

In the paper

“Several recent reviews indicate that nasal obstruction from septal deviation, inferior turbinate hypertrophy, nasal valve collapse, polyposis, and/or inflammation are common in patients with SDB”

What the sources say

• Partly supported

  The Abstract and Discussion report nasal obstruction in 70% of the studied OSA patients and identify septal deviation, inferior turbinate hypertrophy, and inflammation as possible contributors. The paper does not establish nasal valve collapse or polyposis as common causes, and its study population was patients with OSA rather than the broader SDB population. It is a prospective study, not a review. (LLM, conf=0.88)

  cites [276] sourceExperimental — accuracy not yet measured
• Partly supported

  The section “Clinical and experimental evidence of correlation between nasal pathology and SDB” (page unavailable) lists septal deviation, enlarged turbinates, nasal valve collapse, rhinitis, and disease with or without nasal polyps as causes of nasal obstruction. It also associates nasal obstruction with snoring and mild SDB, but does not establish that these causes of obstruction are common among patients with SDB. (LLM, conf=0.84)

  cites [277] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [278] source

In the paper

“Novel variants were associated with AHI as well as oxygen desaturation measures.”

What the sources say

• Supported

  The Fine-mapping analyses report SNPs associated with AHI and a variant associated with both AHI and percentage time with oxygen saturation below 90%. The Discussion describes these as novel signals identified through the study's admixture-mapping and follow-up analyses. (LLM, conf=0.93)

  cites [270] source

In the paper

“For most of the previously described gene variants, there was no evidence of association with OSA diagnosis or with quantitative traits from the sleep study with findings from community-based cohorts which underwent standardized sleep apnea phenotyping.”

What the sources say

• Partly supported

  The results sections report that only three of 40 tested candidate variants validated for EHR-derived OSA diagnosis, and three were associated with quantitative traits from sleep-study reports. However, the Study populations and EHR-Derived OSA phenotypes sections describe health-system EHR cohorts, with sleep-study measures available only for a Geisinger subset—not community-based cohorts that all underwent standardized sleep-apnea phenotyping. Page numbers are unavailable in our copy. (LLM, conf=0.88)

  cites [272] sourceExperimental — accuracy not yet measured

In the paper

“Recently, large biobanks have begun analyzing genetic associations with snoring and ICD-based OSA diagnosis.274”

What the sources say

• Supported

  The Introduction reports larger-scale genome-wide association studies of snoring and describes this paper’s analysis of genetic associations with OSA in FinnGen, using diagnoses based on ICD-9 and ICD-10 codes. The Study samples in other cohorts section also describes ICD-10-based OSA cases in the UK Biobank. (LLM, conf=0.93)

  cites [274] source

In the paper

“More recently, progress has been made using genome-wide association studies263–265 or use of a special SNP panel.266”

What the sources say

• Supported

  The citation to this paper supports the genome-wide association studies part of the sentence, not the separately cited SNP-panel part. The Introduction describes a GWAS of three OSA traits in Hispanic/Latino Americans, and Measurements and Main Results reports novel genome-level significant loci. Page numbers were not supplied. (LLM, conf=0.93)

  cites [263] sourceExperimental — accuracy not yet measured
• Supported

  The citation falls in the genome-wide association studies group, not after the separate SNP-panel claim. The paper’s Conclusions report new genome-level genetic associations with sleep-disordered breathing traits, and its Discussion identifies an association with an OSA-specific trait. This supports the claim that genome-wide analyses have advanced OSA genetics. (LLM, conf=0.91)

  cites [264] sourceExperimental — accuracy not yet measured
• Supported

  The Abstract (p. 8) reports genome-wide association tests across seven studies and identifies a possible OSA-related quantitative trait locus in men. This supports the GWAS part of the citing sentence; the separate citation 266, not this source, is attached to the special SNP panel. (LLM, conf=0.93)

  cites [265] sourceExperimental — accuracy not yet measured
• Supported

  Citation 266 supports the special-SNP-panel part of the sentence, not the separately cited genome-wide association studies. The Abstract describes a customized panel of candidate-gene polymorphisms and reports loci associated with OSA-related phenotypes; the Discussion likewise describes SNPs identified using that approach. (LLM, conf=0.94)

  cites [266] sourceExperimental — accuracy not yet measured

In the paper

“Based on primarily the Hispanic Community Health Study, a variant in GPR83 was found to be associated with AHI.263”

What the sources say

• Partly supported

  The GWAS Results report a significant association between AHI and a locus spanning GPR83; the study sample was predominantly from HCHS/SOL (11,317 of 12,558 participants with AHI data). However, the Figure 1 caption places the lead variant rs116791765 in an intergenic region, not in GPR83 itself, so the claim overstates the variant’s location. (LLM, conf=0.85)

  cites [263] sourceExperimental — accuracy not yet measured

In the paper

“A region on chromosome 18q21 that included 20 variants on NARS/FECH was associated with both AHI and percentage time SaO2 < 90%, with 12 associations that replicated in independent cohorts.”

What the sources say

• Supported

  The Discussion states that 20 NARS/FECH variants on chromosome 18q21 were associated with both AHI and percentage time SaO₂ < 90%, with 12 also associated in independent cohorts. The replication section specifies that the 12 replicated associations were for percentage time SaO₂ < 90% in European-ancestry cohorts; the claim does not say they replicated for both traits. Page numbers were not provided. (LLM, conf=0.95)

  cites [270] source

In the paper

“Evidence for a causal role in OSA was supported by finding that FECH expression was increased in association with lower nocturnal SaO2. These findings suggested a novel for iron metabolism in pathway influencing OSA phenotypes.”

What the sources say

• Partly supported

  The Discussion reports that increased FECH expression was associated with lower nocturnal SaO₂ and suggests that iron/heme metabolism influences OSA traits. It does not establish a causal role; the authors say future research is needed to determine the mechanism. (LLM, conf=0.88)

  cites [270] sourceExperimental — accuracy not yet measured

In the paper

“Mouth breathing during sleep has been associated with up to 2.5 times higher airway resistance.287”

What the sources say

• Supported

  The Results (page not available in our copy) report significantly higher upper airway resistance during oral than nasal breathing in sleep. For supine stage-two sleep, the reported medians are 12.4 and 5.2, respectively—approximately 2.4 times as high, consistent with the cited 2.5-fold description. (LLM, conf=0.90)

  cites [287] source

In the paper

“Conversely, a study by Miljeteig et al.298 divided 683 patients referred for PSG into three groups based on severity of nasal resistance and found no difference in apnea or snoring severity between groups.”

What the sources say

• Supported

  The Patients section (p. 1) states that 683 patients referred for suspected sleep apnea underwent polysomnography. Data Analysis (p. 2) describes three nasal-resistance groups, and Results (p. 2) reports no significant differences in sleep or snoring variables among them. The groups reflect patterns of resistance—normal, high unilateral, and high bilateral—rather than severity alone. (LLM, conf=0.94)

  cites [298] source

In the paper

“A study of 541 snorers who underwent posterior rhinomanometry concluded that nasal obstruction is an independent risk factor for OSA.297”

What the sources say

• Partly supported

  The Abstract says 541 snorers were included to undergo posterior rhinomanometry, but only 528 completed the measurement. It explicitly concludes that daytime nasal obstruction is an independent risk factor for obstructive sleep apnoea syndrome; the claim overstates the number who underwent the test. (LLM, conf=0.90)

  cites [297] sourceExperimental — accuracy not yet measured

In the paper

“Lateral pharyngeal wall edema and enlarged lateral pharyngeal fat pads have been identified via tissue specimens and imaging in OSA patients.200,205,320–322”

What the sources say

• ?Not checked — no full text of the sourcecites [200] source
• ?Not checked — no full text of the sourcecites [205] source
• ?Not checked — no full text of the sourcecites [320] source
• ?Not checked — no full text of the sourcecites [321] source
• Partly supported

  The ‘Sizes of fat deposits and distribution about the palatopharyngeal airspace’ section reports significantly more postero-lateral fat in patients with OSA than in weight-matched controls, based on magnetic resonance imaging. The paper does not identify lateral pharyngeal wall edema or report findings from tissue specimens; its discussion of possible oedema concerns the soft palate. (LLM, conf=0.88)

  cites [322] sourceExperimental — accuracy not yet measured

In the paper

“A recent study by Magliulo et al.276 demonstrated that 70% of patients with OSA had nasal obstruction confirmed by clinical examination and rhinomanometry.”

What the sources say

• Supported

  The Abstract states that nasal obstruction was confirmed by clinical evaluation and rhinomanometry in 70% of the 50 patients with OSA. The Results likewise report 35 of 50 patients (70%) with nasal obstruction assessed by those methods. (LLM, conf=0.95)

  cites [276] source

In the paper

“In contrast, the lumen of snorers and OSA patients is circular or elliptical, with the long axis in the anterior–posterior dimension.314”

What the sources say

• Supported

  The Discussion states that in snorers and apnoeic patients, the pharynx is circular or elliptical with its long axis in the sagittal plane. That is the anterior–posterior orientation described in the claim. (LLM, conf=0.95)

  cites [314] source

In the paper

“The most recent study by Jara and Weaver studied an adult heterogeneous OSA population in the US and found that increasing tonsil grade was significantly associated with increasing OSA severity with adjusted data showing that every increase in tonsil grade as measured by the Brodsky classification system correlated to an increase in AHI of approximately 14 events/h.327”

What the sources say

• Supported

  The Discussion reports that increasing palatine tonsil grade was significantly associated with increasing OSA severity and that the adjusted estimate was approximately 14 additional AHI events per hour for each grade increase. The Conclusion identifies the grading method as the Brodsky scale and describes the cohort as heterogeneous. (LLM, conf=0.94)

  cites [327] source

In the paper

“A normal pharyngeal lumen is elliptical in shape, with the long axis in the lateral dimension.314”

What the sources say

• Supported

  The Results and Discussion state that the pharyngeal cross-section in healthy subjects is elliptical, with its long axis in the coronal plane—that is, the lateral dimension. The claim accurately paraphrases this finding. (LLM, conf=0.94)

  cites [314] source

In the paper

“Given the variability in OSA pathogenesis, the strategy to improve pharyngeal anatomy/collapsibility surgically may be prone to failure in the subset of patients in whom OSA is primarily caused by abnormal ventilatory control.36”

What the sources say

• Supported

  The Loop Gain section says abnormal ventilatory control can be particularly important in patients whose upper airways are only mildly vulnerable to collapse. The PALM scale identifies upper-airway surgery as an anatomic intervention for anatomically driven OSA, while its therapy discussion suggests that patients with nonanatomic vulnerability may need a nonanatomic treatment as well. That supports the citing sentence’s hedged concern about surgery alone, rather than establishing a measured surgical failure rate. (LLM, conf=0.86)

  cites [36] source

In the paper

“From a surgical perspective, elevated loop gain may be important since it has been found to predict failure of sleep apnea surgeries, at least in some cases.363–365”

What the sources say

• Partly supported

  The section “The Value of Estimates of Nonanatomical Traits for Upper Airway Surgery” says elevated baseline loop gain was associated with poor surgical outcome, and “Baseline Loop Gain, Arousal Threshold and Surgical Outcome” reports a correlation with postoperative AHI. However, the Abstract says only preoperative AHI was predictive in multivariate regression, so the paper does not establish elevated loop gain as an independent predictor of surgical failure. (LLM, conf=0.85)

  cites [363] sourceExperimental — accuracy not yet measured
• Partly supported

  The Summary of the Findings (page not available in our copy) identifies high loop gain as a potential reason some patients respond poorly to upper airway surgery. But it presents this as a possible explanation, not a finding that elevated loop gain predicts surgical failure. The Results report an association between changes in loop gain and improvements in apnea severity, rather than a test of preoperative loop gain as a predictor of failure. (LLM, conf=0.83)

  cites [364] sourceExperimental — accuracy not yet measured
• Supported

  The Abstract reports that surgical nonresponders had higher baseline loop gain than responders and that lower loop gain significantly predicted surgical success. Its conclusion explicitly describes predicting surgical failure associated with elevated loop gain, supporting the citing sentence’s qualified claim. (LLM, conf=0.93)

  cites [365] source

In the paper

“They showed that tongue fat volume calculated from the MRI was greater among the obese OSA patients versus obese subjects without apnea.208”

What the sources say

• Supported

  The Results section reports significantly greater tongue fat measured by quantitative volumetric MRI in obese apneics than in controls, including after adjustment for age, BMI, gender, and race (P = 0.002). The Abstract identifies the controls as obese subjects without sleep apnea. (LLM, conf=0.95)

  cites [208] source

In the paper

“High loop gain due to a high controller gain (i.e., overly sensitive thermostat in the analogy above) can be seen in clinical situations such as high altitude or heart failure.351,352”

What the sources say

• ?Not checked — no full text of the sourcecites [351] source
• Supported

  The introductory text in our copy, grouped with the Abstract (page not supplied), links breathing instability in systolic heart failure to increased CO₂ sensitivity and says increased CO₂ sensitivity also causes central sleep apnea at high altitude. This supports the claim’s examples of conditions with an overly sensitive breathing-control response, although the paper does not use the term “loop gain.” (LLM, conf=0.87)

  cites [352] source

In the paper

“Control of breathing is a negative feedback system in which chemoreceptors (e.g., in the carotid body; “controller”) and the lung (“plant”) try to maintain a PaCO2 at roughly 40 mmHg.”

What the sources say

• Partly supported

  The Methods section, “Protocol: LG measurement” (page unavailable), describes a respiratory feedback circuit involving gas exchange and chemoreceptors. The paper does not identify the chemoreceptors as the “controller” or the lung as the “plant,” or state that the system maintains PaCO2 at roughly 40 mmHg. (LLM, conf=0.83)

  cites [180] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [344] source
• ?Not checked — no full text of the sourcecites [345] source
• ?Not checked — no full text of the sourcecites [346] source
• Partly supported

  The paper’s description of loop gain (section labelled Abstract; page unavailable) describes breathing as a chemical-feedback system involving chemoreceptors and a plant that includes the lungs. Table 1 reports a mean baseline PCO2 of 40 mmHg in the healthy elderly subjects, but this is an end-tidal measurement during sleep on CPAP, not a stated PaCO2 target maintained by the system. The cited passages also do not identify the carotid body specifically. (LLM, conf=0.86)

  cites [347] sourceExperimental — accuracy not yet measured

In the paper

“Genta et al. studied 34 Japanese-Brazilian men with OSA and also found an association between greater Pcrit values with an inferiorly and posteriorly positioned hyoid.338”

What the sources say

• Partly supported

  The Results (page not provided) report that higher Pcrit correlated with greater mandibular-plane-to-hyoid distance, a measure of inferior hyoid position. The paper does not report an association with posterior hyoid position. It also states that 11 of the 34 Japanese-Brazilian men did not have OSA, contrary to the citing sentence's description of all 34 as having OSA. (LLM, conf=0.90)

  cites [338] sourceExperimental — accuracy not yet measured

In the paper

“Brennick et al. showed that among obese rats, there was greater deposition of fat within the tongue compared to non-obese rats.342”

What the sources say

• Supported

  The Discussion reports significantly greater total tongue-fat volume in obese than in non-obese Zucker rats. The Biochemical Measurement of Tongue Lipids section also reports significantly more tongue fat in the obese rats. Page numbers were not provided in our copy. (LLM, conf=0.94)

  cites [342] sourceExperimental — accuracy not yet measured

In the paper

“The NPR has been mapped using neurochemical techniques and is thought to be regulated by cholinergic systems in the brainstem, for example, the peri-obex region which is heavily cholinergic.”

What the sources say

• Partly supported

  The Results and Discussion identify the brainstem periobex region as important to the negative pressure reflex: bilateral inhibition of its neurons abolished genioglossus responses to negative pressure in rats. But the paper does not establish that the region is heavily cholinergic or that cholinergic systems regulate the reflex; its intervention used muscimol, a GABA-A receptor agonist. No page numbers are available in our copy. (LLM, conf=0.88)

  cites [391] sourceExperimental — accuracy not yet measured

In the paper

“Pharmacological studies indicate manipulation of the cholinergic system may influence this reflex, recognizing the complex role of acetylcholine throughout the brain and systemically.”

What the sources say

• Supported

  The Abstract proposes that pharmacological manipulation of acetylcholine might augment pharyngeal protective reflexes. A later passage (indexed under References; page unavailable) says cholinergically mediated neurons have been reported to promote upper-airway negative-pressure reflexes in animal studies. Together, these support the citing sentence’s hedged claim, though the paper does not establish an effect of donepezil on that reflex in humans. (LLM, conf=0.87)

  cites [392] source

In the paper

“Through protective UA dilator muscle reflexes, the activity of the muscles is increased during wakefulness in OSA compared to matched controls.201”

What the sources say

• Partly supported

  The Abstract reports significantly greater waking genioglossus activity in OSA patients than in age-matched controls, with the difference persisting in size-matched subsets. The Introduction and later discussion propose a protective reflex response to negative airway pressure, but describe that mechanism as theoretical or speculative rather than established; the study measured the genioglossus, not upper-airway dilator muscles generally. No page number is provided for these passages. (LLM, conf=0.88)

  cites [201] sourceExperimental — accuracy not yet measured

In the paper

“It may be possible to quantify loop gain directly from inlab or home sleep studies.369–371”

What the sources say

• Supported

  The Methods describe estimating loop gain from polysomnography (in-lab sleep studies) and home sleep-test recordings. The discussion states that home sleep testing can estimate loop gain obtained from polysomnography (pp. 1353–1355), supporting the claim's cautious wording. (LLM, conf=0.94)

  cites [369] source
• Partly supported

  The Abstract and Discussion describe estimating loop gain from ventilation signals collected during routine polysomnography, supporting the in-lab portion of the claim. The Methods describe overnight polysomnography, but our copy does not establish that the approach works with home sleep studies. (LLM, conf=0.83)

  cites [370] sourceExperimental — accuracy not yet measured
• Partly supported

  The Discussion (page unavailable) says loop gain can be quantified from routine clinical polysomnography, and Methodological considerations specifies that the study used data from an in-laboratory clinical environment. Our copy does not establish that the method works with home sleep studies, so the home-study part of the claim is unsupported by this source. (LLM, conf=0.86)

  cites [371] sourceExperimental — accuracy not yet measured

In the paper

“Additionally, it is a complex muscle which has both tonic activity (i.e., present throughout the respiratory cycle) as well as phasic activity (i.e., bursts with each inspiration).377,378”

What the sources say

• Supported

  The Methods section classifies genioglossus motor units as tonic when they discharge throughout inspiration and expiration, and phasic when they discharge during only one phase. It specifically describes inspiratory phasic units, supporting the claim that the muscle has both tonic activity and inspiratory bursts. (LLM, conf=0.94)

  cites [377] source
• ?Could not verify

  The References section names a separate study on tonic and phasic respiratory drives to genioglossus motoneurons, but this paper does not itself state that the muscle has both activity patterns. Searches for tonic, phasic, and inspiratory activity found descriptions of motor-unit recordings during breathing, not a passage establishing the claimed distinction. No page numbers are available in our copy. (LLM, conf=0.70)

  cites [378] sourceExperimental — accuracy not yet measured

In the paper

“A recent pilot study showed potential benefits of the combination of oxybutynin and atomoxetine on the AHI.”

What the sources say

• Supported

  The Results reported in the Abstract show that atomoxetine plus oxybutynin lowered the apnea–hypopnea index by 63% compared with placebo after one night. The Discussion describes the study as a proof-of-concept trial and cautions that longer, larger studies are needed, consistent with the citing sentence’s tentative wording. Page numbers are not provided in the supplied passages. (LLM, conf=0.94)

  cites [393] source

In the paper

“Monosynaptic projections from various brain structures have been shown in animal models including locus coeruleus (adrenergic), lateral dorsal/pedunculopontine tegmentum (cholinergic), and hypothalamic (orexinergic) and raphe neurons (serotonergic) among others.”

What the sources say

• Partly supported

  The section headed “The lateral reticular formation as a key state-dependent hub” (page unavailable) describes premotor neurons in the reticular formation that innervate the hypoglossal motor pool, supporting a projection from a brain region. The copy does not establish monosynaptic projections from the cited locus coeruleus, tegmental, hypothalamic, and raphe neurons; its account of tegmental cholinergic activity instead describes intervening circuits. (LLM, conf=0.84)

  cites [375] sourceExperimental — accuracy not yet measured
• Partly supported

  The section on serotonin and pharyngeal motor control describes medullary raphé neurons projecting to the hypoglossal motor nucleus, and the sleep-related suppression section describes inputs from the locus coeruleus complex. But the paper does not establish that these projections are monosynaptic or describe hypothalamic orexinergic projections; its Figure 2 instead places the cholinergic LDT/PPT input at the pontine reticular formation, not directly at hypoglossal motor neurons. No page numbers are available in our copy. (LLM, conf=0.86)

  cites [403] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [404] source
• ?Could not verify

  The passages on upper-airway muscle function and hypoglossal output (section and page unavailable) discuss their roles in obstructive sleep apnoea, but do not describe monosynaptic projections in animal models. Searches for “monosynaptic” and the named brain structures and neurotransmitter systems found no passage addressing the claim. (LLM, conf=0.76)

  cites [405] sourceExperimental — accuracy not yet measured

In the paper

“A negative pressure reflex (NPR) exists whereby a sub-atmospheric (negative inspiratory or suction) pressure leads to a robust activation of the genioglossus muscle.”

What the sources say

• ?Not checked — no full text of the sourcecites [388] source
• ?Not checked — no full text of the sourcecites [389] source
• Supported

  The paper states that suddenly applied negative upper-airway pressure reflexively augments genioglossus activity in awake humans. The Discussion also reports a genioglossus response to brief negative-pressure applications in both normal subjects and patients with OSA; it distinguishes this stimulus from pressure generated during ordinary tidal breathing. (LLM, conf=0.91)

  cites [390] source

In the paper

“Validated functional status and QOL measures most used in the clinical and research settings include the ESS,436 Sleep Apnea Quality of Life Index (SAQLI),437–441 Functional Outcomes of Sleep Questionnaire (FOSQ),437,441,442 and the Pittsburgh Sleep Quality Index (PSQI).443”

What the sources say

• ?Not checked — no full text of the sourcecites [436] source
• Partly supported

  The Discussion (page unavailable) supports the validity of the FOSQ and SAQLI as patient-reported measures for obstructive sleep apnea, and the paper identifies both instruments. An introductory passage says the FOSQ is widely used in sleep research but the SAQLI is less widely used; it therefore does not establish that both are among the measures most used in clinical and research settings. This citation is attached to the SAQLI and FOSQ, not the ESS or PSQI. (LLM, conf=0.85)

  cites [437] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [438] source
• ?Not checked — no full text of the sourcecites [439] source
• Partly supported

  The SAQLI and Discriminative properties sections describe the SAQLI as an obstructive-sleep-apnoea quality-of-life measure and report evidence for its validity. The introduction mentions the FOSQ as an emerging sleep-specific questionnaire, but this paper does not validate it or establish that these measures are among the most used in clinical and research settings. The cited paper’s contribution therefore supports the SAQLI portion, not the full claim. (LLM, conf=0.84)

  cites [440] sourceExperimental — accuracy not yet measured
• Supported

  The Introduction and Methods identify the SAQLI and FOSQ as sleep-specific quality-of-life questionnaires used in research on obstructive sleep apnea. The Discussion describes them as commonly used measures relevant to research and clinical care. This source is cited for the SAQLI and FOSQ; the sentence cites other sources for the ESS and PSQI. (LLM, conf=0.87)

  cites [441] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [442] source

In the paper

“Consequently, combinations of therapy may well be required to eliminate apnea using this approach.”

What the sources say

• Supported

  The Significance section says that treatments targeting a single trait, including hypnotics that raise the arousal threshold, rarely completely resolve OSA and that manipulating one trait may be inadequate. The Discussion reports improved OSA severity with a combination targeting the arousal threshold and loop gain. This supports the cautious claim that combination therapy may be required. (LLM, conf=0.92)

  cites [415] source

In the paper

“and 89% and 88% respectively among general clinic patients.”

What the sources say

• ?Not checked — no full text of the sourcecites [422] source
• ?Could not verify

  The paper’s Introduction and results discuss STOP-Bang sensitivity, not an 89% sensitivity for the Berlin questionnaire among general clinic patients. A search for the Berlin questionnaire found it in the References, but no passage reporting the claimed figure or population; pages are unavailable in our copy. (LLM, conf=0.76)

  cites [423] sourceExperimental — accuracy not yet measured

In the paper

“many patients with a high arousal threshold with sleep apnea will experience a lowering of arousal threshold over time on therapy.”

What the sources say

• Supported

  The Arousal Threshold section (p. 8) reports that 7 of 8 patients with the highest pretreatment arousal thresholds had a marked decrease after CPAP therapy. The Discussion (p. 6) likewise identifies a reduction in arousal threshold among patients whose threshold was high before therapy. (LLM, conf=0.93)

  cites [417] source
• Partly supported

  The main text (page not supplied) says that CPAP lowers the arousal threshold in patients with obstructive sleep apnoea, supporting the central point. It does not establish that this happens in many patients or specify that the lowering occurs over time on therapy; its reference to change over time concerns how the elevated threshold may develop. (LLM, conf=0.84)

  cites [418] sourceExperimental — accuracy not yet measured

In the paper

“the Berlin and STOP-BANG questionnaires have reported sensitivities of 79%–82% and 91% respectively among surgical patients”

What the sources say

• ?Not checked — no full text of the sourcecites [422] source
• Partly supported

  The pooled predictive parameters section reports 91% sensitivity for STOP-Bang among surgical patients, but specifically for detecting moderate-to-severe OSA with a score of 3 as the cut-off. The citing sentence omits that qualification; the same passage reports 84% sensitivity for any OSA. (LLM, conf=0.87)

  cites [423] sourceExperimental — accuracy not yet measured

In the paper

“the existing data suggest that any improvements in apnea which occur with these agents are relatively modest.”

What the sources say

• Partly supported

  The Discussion (page unavailable) reports that eszopiclone reduced the apnoea/hypopnoea index by about 45% in patients with a low arousal threshold, but only two of eight reached fewer than 10 events per hour; it says additional strategies may be needed to eliminate apnoea. This supports the point that improvement can be incomplete, but the study does not establish that improvements with sedatives or hypnotics generally are relatively modest. (LLM, conf=0.82)

  cites [400] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [401] source

In the paper

“The Berlin and STOP-BANG questionnaires have sensitivities of 82% and 94%, respectively,422,423”

What the sources say

• ?Not checked — no full text of the sourcecites [422] source
• ?Could not verify

  The Results section reports 94% sensitivity for STOP-Bang in detecting moderate-to-severe OSA in sleep-clinic patients, but does not report 82% sensitivity for the Berlin questionnaire. A search of our copy for Berlin questionnaire sensitivity found only a reference identifying that questionnaire, not the claimed figure. The cited paper supports the STOP-Bang half of the printed sentence, not the Berlin claim assessed here. (LLM, conf=0.76)

  cites [423] sourceExperimental — accuracy not yet measured

In the paper

“and 89% and 88% respectively among general clinic patients.”

What the sources say

• ?Not checked — no full text of the sourcecites [422] source
• Partly supported

  The section on predictive parameters in the general population (page not available) reports 88% sensitivity for detecting moderate-to-severe OSA, but its participants were from the Sleep Heart Health Study, not general clinic patients. The same section reports different pooled sensitivities for sleep-clinic patients, so the claimed population is not supported. (LLM, conf=0.88)

  cites [423] sourceExperimental — accuracy not yet measured

In the paper

“an agent which raises the arousal threshold may yield substantial hypoxemia and hypercapnia which could impact end organ function.”

What the sources say

• Partly supported

  The Discussion says apnea causes hypoxemia that may contribute to cardiovascular complications. It does not address whether an agent that raises the arousal threshold causes substantial hypoxemia or hypercapnia; searches for those terms found no supporting passage. (LLM, conf=0.82)

  cites [414] sourceExperimental — accuracy not yet measured

In the paper

“The Berlin and STOP-BANG questionnaires have sensitivities of 82% and 94%, respectively,422,423”

What the sources say

• ?Not checked — no full text of the sourcecites [422] source
• Partly supported

  The ‘Predictive parameters ... in the sleep clinic population’ passage reports 94% pooled sensitivity for moderate-to-severe OSA at a STOP-Bang cutoff of 3. The citing sentence gives 94% without those qualifications; the paper reports different sensitivities for surgical patients and the general population. (LLM, conf=0.88)

  cites [423] sourceExperimental — accuracy not yet measured

In the paper

“At this cutoff score, the STOP-BANG also has the best combination of sensitivity and specificity for severe OSA (AHI ≥ 30) in sleep clinic patients (66%, 66%) and surgical patients (56%, 74%).”

What the sources say

• Supported

  Table 4 (Discussion; page unavailable) gives the severe-OSA (AHI 30) results at a STOP-Bang cutoff of 5: 66% sensitivity and 66% specificity in sleep clinic patients, and 56% and 74% in surgical patients. Its comparisons across cutoffs support describing this as a best balance of sensitivity and specificity. (LLM, conf=0.92)

  cites [423] source

In the paper

“while the NoSAS has a sensitivity of 65%–90% in identifying sleep clinic patients with clinically relevant OSA.”

What the sources say

• Partly supported

  The Results report that NoSAS screened patients referred to a sleep clinic for OSA, including moderate-to-severe OSA. But at a NoSAS cutoff of ≥7, sensitivity was 94.9% for moderate-to-severe OSA—above the claimed 65%–90% range. The claim does not specify a cutoff, and the cited Results passage does not establish that range. (LLM, conf=0.86)

  cites [424] sourceExperimental — accuracy not yet measured
• Partly supported

  The Results report that NoSAS detected 76.8% of sleep-center participants with severe sleep-disordered breathing (AHI ≥30 events/h), supporting a sensitivity within the claimed range. Our copy does not report a 65%–90% sensitivity range for clinically relevant OSA; the separately reported 74.8% is a correct-classification rate, not sensitivity. (LLM, conf=0.83)

  cites [425] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [426] source
• Partly supported

  The Conclusions tables report NoSAS sensitivity in sleep-center patients of 64.9% for AHI ≥15 events/h, approximately the claimed lower bound. They report 59.0% for AHI ≥5 and 64.4% for AHI >30; they do not support a sensitivity as high as 90%. (LLM, conf=0.87)

  cites [427] sourceExperimental — accuracy not yet measured
• Partly supported

  The Abstract reports NoSAS sensitivities of 71.2%, 80.4%, and 83.1% for sleep-clinic patients at three SDB severity cutoffs. These values fall within 65%–90%, but the paper does not report that range for NoSAS; Table 2 attributes sensitivity above 90% to STOP-Bang instead. (LLM, conf=0.88)

  cites [428] sourceExperimental — accuracy not yet measured
• ?Could not verify

  The Results of accuracy outcomes section reports sensitivities for several screening questionnaires in sleep-disorder patients, but does not report a NoSAS result. Searches for “NoSAS” and “65%–90%” found no passage in our copy supporting the claimed sensitivity range for that questionnaire; the reported ranges concern other questionnaires. (LLM, conf=0.76)

  cites [429] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [430] source
• ?Not checked — no full text of the sourcecites [431] source

In the paper

“The ROC curves for the STOP-BANG at different OSA severity classes showed a STOP-BANG cutoff score of 5 had the best combination of sensitivity and specificity for moderate-severe OSA (AHI ≥ 15) in sleep medicine (60%, 72%) and surgical populations (45%, 56%).”

What the sources say

• Partly supported

  Table 4 (Discussion; page unavailable) reports exactly the stated sensitivity and specificity at a STOP-Bang cutoff of 5 for moderate-to-severe OSA: 60% and 72% in sleep-clinic patients, and 45% and 56% in surgical patients. The paper reports results across cutoffs but does not identify 5 as having the best combination of sensitivity and specificity. (LLM, conf=0.87)

  cites [423] sourceExperimental — accuracy not yet measured

In the paper

“the arousal threshold is not a fixed trait but rather a dynamic phenomenon which changes with treatment.”

What the sources say

• Supported

  The Arousal Threshold section (p. 8) reports that arousal threshold decreased overall following CPAP therapy, while noting substantial variation among patients. The results on p. 5 likewise show marked decreases in patients with high thresholds before therapy. This supports the claim that arousal threshold can change with treatment rather than being a fixed trait. (LLM, conf=0.92)

  cites [417] source
• Supported

  The main text of “Stable breathing through deeper sleeping” says that CPAP lowers the arousal threshold in patients with OSA and that certain hypnotic agents can raise it. This supports the claim that the threshold is not fixed and can change with treatment, in the OSA context discussed by the paper. (LLM, conf=0.93)

  cites [418] source

In the paper

“Sands et al. developed a technique using signal processing of the polysomnographic recordings which can also estimate the arousal threshold using clinically available data.”

What the sources say

• Supported

  The Abstract says the authors extended their polysomnography-based approach for estimating arousal threshold and tested traits obtained using nasal pressure, a clinical surrogate for ventilation. The Discussion says the approach can estimate four key OSA traits, including arousal threshold, and has potential for clinical use when nasal pressure and EEG are carefully recorded. (LLM, conf=0.90)

  cites [370] source

In the paper

“the Berlin and STOP-BANG questionnaires have reported sensitivities of 79%–82% and 91% respectively among surgical patients”

What the sources say

• ?Not checked — no full text of the sourcecites [422] source
• ?Could not verify

  The surgical-population results report STOP-Bang sensitivities, including 91% for moderate-to-severe OSA, but do not report a Berlin questionnaire sensitivity. A search for “Berlin questionnaire” found it in the References, without the claimed 79%–82% figure for surgical patients. (LLM, conf=0.76)

  cites [423] sourceExperimental — accuracy not yet measured

In the paper

“where an increased risk of cardiopulmonary disease and mortality has been established (true positive)432–434”

What the sources say

• Partly supported

  The paper’s Abstract (page unavailable) reports that cohort studies consistently associate OSA with increased cardiovascular mortality, and its section on independent cardiometabolic effects reports an association with cardiovascular events. It defines moderate-to-severe OSA as AHI ≥15, but does not establish that threshold specifically for the reported risks or address pulmonary disease risk. (LLM, conf=0.87)

  cites [432] sourceExperimental — accuracy not yet measured
• Partly supported

  The Abstract (page not provided) reports that moderate-to-severe OSA, defined by RDI ≥15/hr, was independently associated with increased all-cause mortality. The Introduction (page not provided) describes evidence linking OSA to cardiovascular conditions, but this study did not establish an increased risk of cardiopulmonary disease; it also cautions that causation is difficult to establish. (LLM, conf=0.86)

  cites [433] sourceExperimental — accuracy not yet measured
• Partly supported

  The Discussion and Table 6 report significantly increased all-cause and cardiovascular mortality for severe sleep-disordered breathing (AHI ≥30), but not for moderate disease (AHI 15–<30). The Abstract says sleep-disordered breathing is linked to incident cardiovascular disease; this study does not establish increased cardiopulmonary disease risk across the claimed AHI ≥15 group. Page numbers were not supplied in our copy. (LLM, conf=0.88)

  cites [434] sourceExperimental — accuracy not yet measured

In the paper

“The SAQLI showed moderate correlations (0.3 ≤ r < 0.7) with related domains of general health-status questionnaires such as the 36-item Short Form (SF-36) and the Global QOL Scale.”

What the sources say

• Partly supported

  The Criterion Validity section (page unavailable) reports moderate correlations between SAQLI subscales and the SF-36 social functioning and vitality domains (r = 0.40–0.58). Table 4 also reports some SF-36 correlations below 0.3, and our copy does not report a correlation with the Global QOL Scale (searched: “Global QOL Scale”). (LLM, conf=0.86)

  cites [437] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [438] source
• ?Not checked — no full text of the sourcecites [439] source
• Partly supported

  The Discriminative properties section reports good correlations between the SAQLI and related measures. Table 4 reports several moderate correlations with SF-36 domains and a global rating of change, but its SF-36 vitality correlations are 0.76 and 0.88—above the claimed range. The paper calls the global measure a rating of change, not a “Global QOL Scale.” (LLM, conf=0.88)

  cites [440] sourceExperimental — accuracy not yet measured
• Partly supported

  The Results report SAQLI correlations of r = 0.52 with the SF-36 mental component and r = 0.42 with its physical component, both within the claimed range. The Methods and Results do not identify or report a correlation with a Global QOL Scale, so that part of the claim is unsupported. (LLM, conf=0.89)

  cites [441] sourceExperimental — accuracy not yet measured

In the paper

“PSG measures (AHI, minimum O2 saturation) were either poorly or not significantly correlated with any of the questionnaires.”

What the sources say

• ?Not checked — no full text of the sourcecites [436] source
• Partly supported

  The Relation with AHI section reports no correlation between AHI and FOSQ or SAQLI scores, except a weak correlation with SAQLI emotional functioning (r = 0.134). Our copy does not report correlations between minimum O2 saturation and the questionnaires, or establish the claim for every questionnaire used in the study. (LLM, conf=0.86)

  cites [437] sourceExperimental — accuracy not yet measured
• Partly supported

  The Results (page unavailable) say AHI severity was significant in the adjusted models only for the SF-36 physical component score in females with severe OSA, broadly supporting a limited association with questionnaire scores. The paper does not report correlations between minimum O2 saturation and the questionnaires; its reported correlation coefficients compare the questionnaires with one another, so that part of the claim is unsupported. (LLM, conf=0.86)

  cites [441] sourceExperimental — accuracy not yet measured

In the paper

“while the FOSQ and SAQLI demonstrated excellent internal consistency (α ≥ 0.9).437,438,440,442”

What the sources say

• Supported

  The Internal Reliability section (page not supplied) reports Cronbach’s α of 0.94 for the FOSQ total score and 0.92 for the SAQLI total score. Both meet the stated α ≥ 0.9 threshold. (LLM, conf=0.94)

  cites [437] source
• ?Not checked — no full text of the sourcecites [438] source
• Partly supported

  The Reliability and internal consistency section (page not specified) reports SAQLI Cronbach’s alpha values of 0.94, 0.90, and 0.93 for three domains. The paper mentions the FOSQ but does not report its internal consistency, so it supports only the SAQLI part of the claim. (LLM, conf=0.88)

  cites [440] sourceExperimental — accuracy not yet measured

In the paper

“A recent multicenter prospective study enrolled 812 patients diagnosed with type 2 diabetes, obesity, HF, or resistant hypertension who completed multiple OSA screening questionnaires. Following a diagnostic sleep study, the STOP-BANG questionnaire (with “high-risk” set to 3 points or above) had a greater sensitivity than either the Berlin questionnaire or the OSA50 questionnaire (95%, 75%, and 88”

What the sources say

• Supported

  Split into 2 atoms — 2 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

  cites [455] source

In the paper

“The FOSQ showed moderate correlations with related domains of the SF-36 and the Sickness Impact Profile.”

What the sources say

• Partly supported

  The Criterion Validity section reports moderate correlations between FOSQ activity level and SF-36 domains, except bodily pain; the Discussion also describes moderate correlations with SF-36 social and physical role domains. Our copy does not report a correlation between the FOSQ and the Sickness Impact Profile (searched: “Sickness Impact Profile” and “SIP”). Page numbers were not available in the indexed passages. (LLM, conf=0.88)

  cites [437] sourceExperimental — accuracy not yet measured
• Partly supported

  The Results (page not supplied) report correlations between the FOSQ and SF-36 summary scales, but describe them as small (r=.31 and .37), not moderate. The paper does not report a comparison with the Sickness Impact Profile. (LLM, conf=0.88)

  cites [441] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [442] source

In the paper

“The FOSQ and SAQLI demonstrated excellent test–retest reliability (ICC ≥ 0.9)439,440,442”

What the sources say

• ?Not checked — no full text of the sourcecites [439] source
• Partly supported

  The Reliability and internal consistency section reports excellent SAQLI test–retest reliability, with ICCs of 0.91–0.94 in 14 untreated patients. The paper mentions the FOSQ as another sleep-specific questionnaire but does not report its test–retest reliability, so this source supports only the SAQLI portion of the claim. Page numbers were not available in our copy. (LLM, conf=0.90)

  cites [440] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [442] source

In the paper

“The largest comparative study to date was a retrospective review by Silva et al. that included 4770 patients from the SHHS. For this cohort, the STOP-BANG had the highest sensitivity for moderate-to-severe OSA (87%).”

What the sources say

• Supported

  The Methods passage describes an analysis of baseline SHHS data from 4,770 participants. The Results passage reports that STOP-Bang had the highest sensitivity for moderate-to-severe sleep-disordered breathing, at 87.0%. (LLM, conf=0.91)

  cites [456] source

In the paper

“Its sensitivity is 69–87% in surgical patients.”

What the sources say

• Supported

  The Discussion reports Berlin questionnaire sensitivity of 68.9% in surgical patients, rising to 78.6–87.2% for moderate or severe OSA. Table 2 shows these values at different apnea-hypopnea index cutoffs, supporting the rounded 69–87% range. (LLM, conf=0.94)

  cites [489] source

In the paper

“The 4-Variable screening tool (sex, BMI, BP, and snoring) had the highest specificity.”

What the sources say

• Supported

  The Abstract reports that, among SHHS participants, the 4-Variable screening tool had higher specificity than the other tools for both moderate-to-severe and severe sleep-disordered breathing (93.2% for each). The paper also identifies its four variables as sex, BMI, blood pressure, and snoring. (LLM, conf=0.95)

  cites [456] source

In the paper

“There is very little evidence on the benefits of widespread screening for OSA in asymptomatic adults without comorbidities.”

What the sources say

• ?Could not verify

  The Results and Discussion assess questionnaire accuracy in patients with and without known sleep problems, not the benefits of widespread screening in asymptomatic adults without comorbidities. A search for screening benefits in that population found no passage addressing the claim; the copy instead discusses possible benefits in surgical patients. (LLM, conf=0.75)

  cites [429] sourceExperimental — accuracy not yet measured

In the paper

“After increasing the “high-risk” threshold to 5 or above on the STOP-BANG, it also had a greater specificity (69% compared to 38% for the Berlin and 21% for the OSA 50).”

What the sources say

• Supported

  The Abstract reports specificity of 69% for STOP-BANG ≥ 5, compared with 38% for Berlin and 21% for OSA50, using REI ≥ 15 events/h in the studied high-risk clinic population. (LLM, conf=0.95)

  cites [455] source

In the paper

“Moreover, these complications have increasingly resulted in malpractice lawsuits.”

What the sources say

• ?Not checked — no full text of the sourcecites [478] source
• Partly supported

  The Materials and Methods and Injury and Liability sections document malpractice claims associated with postoperative opioid-induced respiratory depression. They do not establish that such lawsuits have become more frequent. The discussion reports a decline for one subgroup of claims, but that does not establish an overall trend. (LLM, conf=0.86)

  cites [479] sourceExperimental — accuracy not yet measured

In the paper

“the preoperative assessment is a cost-effective opportunity to screen for and select high risk patients who can then be offered sleep study and treatment for OSA.”

What the sources say

• Partly supported

  The Discussion (page not available in our copy) favors preoperative STOP-Bang screening followed by polysomnography for screen-positive patients when costs and benefits are assessed over a lifetime. It also says no screening was favored when only the perioperative period was considered. The claim omits that qualification on cost-effectiveness. (LLM, conf=0.86)

  cites [488] sourceExperimental — accuracy not yet measured

In the paper

“reports of other screening instruments have suggested minimal burden and disruption of the clinical workflow.”

What the sources say

• ?Not checked — no full text of the sourcecites [446] source
• ?Not checked — no full text of the sourcecites [459] source
• Partly supported

  The ‘Opportunistic screening’ section describes a one-minute pulse check during a routine consultation, and Table 2 (‘The screening programme’) records short staff and administration times. These support a limited claim about time burden, but the paper does not report whether screening minimally disrupted clinical workflow. (LLM, conf=0.79)

  cites [460] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [461] source

In the paper

“Women with SDB have the strongest correlations between caffeinated soda and OSA. There was only an association between caffeinated soda and severe SDB in men.524 Coffee and tea consumption were not associated with SDB.”

What the sources say

• Supported

  The Abstract states that, for men, an association with caffeinated soda use was noted only for severe SDB. The Results likewise report a significantly higher proportion consuming caffeinated soda only among men with severe SDB, compared with men without SDB or with mild or moderate SDB. (LLM, conf=0.95)

  cites [524] source

In the paper

“Treatment with CPAP has been shown to improve nocturia in patients with OSA.522”

What the sources say

• Supported

  The Abstract reports that, across five publications involving 307 patients, CPAP treatment was associated with a significant decrease in nocturia frequency among patients with OSA. The Discussion also concludes that CPAP appears effective for reducing nocturia in these patients. (LLM, conf=0.94)

  cites [522] source

In the paper

“Neck circumference (NC) or collar size is associated with OSA in adults.184,528–534”

What the sources say

• Supported

  The Results report that neck circumference was significantly associated with OSA in the male sample, and Tables 3 and 4 show associations in both male and female samples. The paper measures neck circumference rather than collar size, but the claim presents collar size as an alternative term, not a separate finding. (LLM, conf=0.91)

  cites [184] sourceExperimental — accuracy not yet measured
• Supported

  The Background describes a large neck as an important variable in OSAS risk. The Abstract and Conclusions report that neck circumference was higher in patients with severe than non-severe OSAS and was associated with severe OSAS. The paper measures neck circumference rather than collar size, but supports the cited sentence’s association between neck size and OSA. (LLM, conf=0.90)

  cites [528] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [529] source
• ?Not checked — no full text of the sourcecites [530] source
• Supported

  The Discussion reports that greater neck circumference was related to OSA in the adult populations reviewed. The Results also list neck circumference among the associated factors in studies using sleep monitoring. The paper does not use the term “collar size,” but the claim’s neck-circumference wording is directly supported. (LLM, conf=0.88)

  cites [531] source
• ?Not checked — no full text of the sourcecites [532] source
• Supported

  The Results report that neck circumference was significantly associated with the frequency of overnight oxygen-desaturation dips and was the strongest predictor in the regression model. The Abstract describes this as an association between neck size and obstructive sleep apnoea defined by nocturnal hypoxaemia in the study’s men aged 35–65. (LLM, conf=0.89)

  cites [533] sourceExperimental — accuracy not yet measured
• Supported

  The Results report that neck circumference was significantly greater in the adult OSA group than in controls and was positively correlated with apnea–hypopnea index. This supports the claimed association; the study measured neck circumference rather than collar size. (LLM, conf=0.94)

  cites [534] sourceExperimental — accuracy not yet measured

In the paper

“Findings from several population-based and retrospective studies have demonstrated that habitual snoring and witnessed apneas are predictors for OSA.”

What the sources say

• ?Not checked — no full text of the sourcecites [88] source
• ?Not checked — no full text of the sourcecites [145] source
• Partly supported

  The Results (page not provided) report that patients with OSA more often reported snoring and witnessed apneas, supporting an association with OSA. But the Database section says the questionnaire did not measure snoring frequency, and the study examined a referred sleep-laboratory cohort—not several population-based and retrospective studies. The Introduction also cautions that classic symptoms are not strongly predictive. (LLM, conf=0.87)

  cites [505] sourceExperimental — accuracy not yet measured

In the paper

“Sex differences in reported sleep symptoms have been reported, with men being more likely to report snoring (34% vs. 19%) and women being more likely to report hypersomnolence (22.6% vs. 15.5%).90”

What the sources say

• Partly supported

  Table 1 (Collection of Polysomnographic Data, p. 2) supports the direction of the sex difference: 44% of men and 28% of women were classified as habitual snorers. It does not support the attributed 34% versus 19% figures; its definition of habitual snoring also includes reported snorting or breathing pauses. (LLM, conf=0.87)

  cites [90] sourceExperimental — accuracy not yet measured

In the paper

“Obesity is a well-established risk factor for the development and progression of OSA. A BMI greater than 30 increases risk for OSA350 and weight reduction is a treatment option that can improve OSA severity.189”

What the sources say

• Partly supported

  Section III, “Pathogenesis of Sleep Apnea” (page not provided), identifies excess body weight as the dominant risk factor for OSA in the general population. The paper supports the increased-risk point, but the passages found do not establish BMI greater than 30 as a specific risk threshold. (LLM, conf=0.84)

  cites [350] sourceExperimental — accuracy not yet measured

In the paper

“Many validated questionnaires445,446,510 include some or all of these symptoms and may help identify patients at risk for OSA.509”

What the sources say

• Supported

  The Methods describe the Berlin questionnaire as a validated instrument that assesses snoring, witnessed apnea and other risk factors to classify patients as high or low risk for OSA. They also describe the STOP questionnaire, which uses four symptom and risk-factor questions to identify a high-risk category. The Results report that both questionnaires identified patients at high risk for OSA. (LLM, conf=0.92)

  cites [509] source

In the paper

“Sex differences in reported sleep symptoms have been reported, with men being more likely to report snoring (34% vs. 19%) and women being more likely to report hypersomnolence (22.6% vs. 15.5%).90”

What the sources say

• Partly supported

  The Occurrence of Hypersomnolence (p. 3) reports that hypersomnolence was more common among women than men and gives the cited 22.6% and 15.5% figures. Those figures apply only to subjects with apnea-hypopnea scores of 5 or higher, a restriction the citing sentence omits. (LLM, conf=0.88)

  cites [90] sourceExperimental — accuracy not yet measured

In the paper

“Neck circumference is associated with OSA severity.138,528”

What the sources say

• ?Could not verify

  The Study Design passages describe OSA classification by apnea–hypopnea index, and the Economic Analysis passages address testing and costs; neither discusses neck circumference or its relationship to OSA severity. Searches for “neck circumference” and related association terms found no passage addressing the claim. No page number was provided for these passages. (LLM, conf=0.74)

  cites [138] sourceExperimental — accuracy not yet measured
• Supported

  The Results report that neck circumference was an independent risk factor for severe OSAS (OR 1.55, 95% CI 1.09–2.21; p=0.01). The Conclusions also state that neck circumference was higher in severe than non-severe OSAS patients, supporting the claimed association with severity. (LLM, conf=0.94)

  cites [528] source

In the paper

“Obesity is a well-established risk factor for the development and progression of OSA. A BMI greater than 30 increases risk for OSA350 and weight reduction is a treatment option that can improve OSA severity.189”

What the sources say

• Supported

  Section III, “Pathogenesis of Sleep Apnea” (page unavailable), identifies excess body weight as the dominant risk factor for OSA in population-based cross-sectional and longitudinal studies. The “Obesity, leptin, and inflammation” section also states that central obesity carries the greatest OSA risk, supporting the cited broad claim. (LLM, conf=0.90)

  cites [350] source

In the paper

“Studies on patients with untreated OSA have demonstrated that increased caffeine intake is associated with less cognitive impairment523 thereby indicating a potential therapeutic effect of caffeine and evidence for self-treatment of OSA.”

What the sources say

• Supported

  The Abstract identifies the participants as untreated OSA patients. The Results report a significant inverse association between caffeine intake and the global deficit score, and the Discussion states that cognitively impaired patients consumed one-sixth as much caffeine as non-impaired patients. The citing sentence’s therapeutic and self-treatment interpretation is an inference beyond the association attributed to this source. (LLM, conf=0.94)

  cites [523] source

In the paper

“Women with SDB have the strongest correlations between caffeinated soda and OSA. There was only an association between caffeinated soda and severe SDB in men.524 Coffee and tea consumption were not associated with SDB.”

What the sources say

• Supported

  The Discussion reports that no association was identified between SDB severity and coffee or tea consumption in the study's community sample. This supports the citing sentence as a summary of the study's finding, rather than a claim that no association could exist in any population. (LLM, conf=0.92)

  cites [524] source

In the paper

“Specifically, NC > 40 cm (16 inch) is associated with snoring and OSA.528,529,536–538”

What the sources say

• Partly supported

  The Clinical Research and Conclusions sections associate larger neck circumference with more severe obstructive sleep apnea syndrome. The paper does not establish a >40 cm threshold or an association between that threshold and snoring; its Polysomnography section says only that snoring noise was recorded. (LLM, conf=0.88)

  cites [528] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [529] source
• Partly supported

  The Risk factors for habitual snoring section reports an association between wide neck circumference (>40 cm) and habitual snoring, and the Discussion reports an association with sleep-disordered breathing (SDB). The Interview questionnaire section defines SDB by reported symptoms, and the study acknowledges that it did not use polysomnography to diagnose it; the paper therefore does not directly establish an association with diagnosed OSA. Page numbers are unavailable in our copy. (LLM, conf=0.87)

  cites [536] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [537] source
• ?Not checked — no full text of the sourcecites [538] source