The DOI matches its Crossref record; 366 of the 367 references it cites were found in a registry or an index; none of the 64 sources its claims cite is checked for support yet.
Sleep and mental disorders: a meta-analysis of polysomnographic research
Open accessAbstract
Investigating sleep in mental disorders has the potential to reveal both disorder-specific and transdiagnostic psychophysiological mechanisms. This meta-analysis aimed at determining the polysomnographic (PSG) characteristics of several mental disorders. Relevant studies were searched through standard strategies. Controlled PSG studies evaluating sleep in affective, anxiety, eating, pervasive developmental, borderline and antisocial personality disorders, attention-deficit-hyperactivity disorder (ADHD), and schizophrenia were included. PSG variables of sleep continuity, depth, and architecture, as well as rapid-eye movement (REM) sleep were considered. Calculations were performed with the "Comprehensive Meta-Analysis" and "R" software. Using random effects modeling, for each disorder and each variable, a separate meta-analysis was conducted if at least 3 studies were available for calculation of effect sizes as standardized means (Hedges' g). Sources of variability, that is, sex, age, and mental disorders comorbidity, were evaluated in subgroup analyses. Sleep alterations were evidenced in all disorders, with the exception of ADHD and seasonal affective disorders. Sleep continuity problems were observed in most mental disorders. Sleep depth and REM pressure alterations were associated with affective, anxiety, autism and schizophrenia disorders. Comorbidity was associated with enhanced REM sleep pressure and more inhibition of sleep depth. No sleep parameter was exclusively altered in 1 condition; however, no 2 conditions shared the same PSG profile. Sleep continuity disturbances imply a transdiagnostic imbalance in the arousal system likely representing a basic dimension of mental health. Sleep depth and REM variables might play a key role in psychiatric comorbidity processes. Constellations of sleep alterations may define distinct disorders better than alterations in 1 single variable. (PsycINFO Database Record
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In the paper
“No sleep parameter was exclusively altered in one condition”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Abstract
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Sleep alterations were evidenced in all disorders, with the exception of ADHD and seasonal affective disorders.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Abstract
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesThe paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“no two conditions shared the same PSG profile”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Abstract
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesThe paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Sleep depth and REM pressure alterations were associated with affective, anxiety, autism and schizophrenia disorders.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Abstract
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“As for main analyses, no significant result was found for ADHD.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Enhanced sleep onset latency was observed in men with PTSD.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Moreover, duration of REML was only marginally shortened compared to healthy controls.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Similarly, shorter sleep time and increased time awake during the night were found only in male samples with depression.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Instead, no significant result was evidenced for ADHD in analyses for each sleep variable, similarly to sleep domains analyses.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Instead, women, but not men, with depression spent longer time in stage 1 sleep than controls.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passes
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- It may state two separate claims as one. 64
- Probably not a substantial claim. 60
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In the paper
“Sleep continuity problems were observed in most mental disorders.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Abstract
Load-bearingCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes? Based: unclearBorderline substantial claim. It is unclear why the paper says it holds.
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In the paper
“In the absence of comorbidities, major depression was no longer associated with increased REM sleep pressure.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Comorbidity excluded
Tests? Asserted: unclear✓ Checkable: passes? Load-bearing: unclear? Based: unclearBorderline substantial claim. It is unclear whether the authors put it forward as true. It is unclear whether the paper’s conclusions depend on it. It is unclear why the paper says it holds.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Comorbidity was associated with enhanced REM sleep pressure and more inhibition of sleep depth.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Abstract
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“The largest sample available for calculations related to REM latency for affective disorders included 1597 patients and 1178 controls.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Strength:plain· not yet calibratedn = 1,597Tests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“The working age adults group was evaluated in the majority of the studies, thus, the results related to this age group did not differ substantially from the main results.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Instead, no sleep alteration was observed in ADHD and seasonal affective disorder (apart from marginally significant shortened TST), although analyses for this last condition were limited.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Instead, analyses for Asperger syndrome (34 patients vs 24 controls) included the smallest sample size.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Strength:plain· not yet calibratedn = 34Tests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Panic disorder was linked with poorer sleep efficiency, marginally significant longer sleep onset latency and shortened total sleep time compared to controls.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Finally, schizophrenia was associated with alteration of sleep continuity, sleep architecture and longer REM latency.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Differently, patients with autism spent shorter time in REM compared to controls, but did not present alterations in REML nor REMD.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Considering specific sleep variables, we found no change in total sleep time, REMD, and duration of S1 and REM sleep compared to controls.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Patients with anxiety disorders, and in particular PTSD, presented shortened SWS, but no alterations in duration of S1 and S2.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Nevertheless, neither patients with anorexia nervosa nor with borderline personality disorder spent more time to fall asleep than controls.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“With respect to depression, sleep continuity and depth, as well as REM pressure were all altered in male patients compared to controls, while in female samples only sleep continuity was found to be disturbed.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Within pervasive developmental disorders, Asperger syndrome was not associated with alterations of sleep architecture and REM, while autistic patients spent reduced time in REM sleep.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“REM sleep variables (REM latency, REM density and REM sleep duration) were all altered only in men with depression, and not in women, for whom only a marginally significant increased REMD was noted.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Anorexia nervosa was associated with sleep discontinuity and lighter sleep, although this last result was only marginally significant.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“REM pressure was increased in affective, anxiety and autistic disorders.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Within categories, reduction of sleep depth was found in major depression and PTSD (although the result was only marginally significant), but not in panic disorders.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Analyses for single sleep variables evidenced shortened REML in patients with anxiety disorders, and in particular PTSD, but no alterations in REMD and REM duration.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Within categories, enhanced REM sleep pressure was found in major depression and PTSD, but not in seasonal affective and panic disorders.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Borderline personality disorder was linked with sleep discontinuity and shorter REM latency.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Children and/or adolescents with major depression, presented, in comparison with the main results, only marginally significant poorer sleep continuity compared to controls, but no alterations of sleep depth and REM sleep pressure.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“The result was marginally significant for eating disorder and Asperger syndrome, although this may be dependent on the small number of studies available for these categories (respectively N=5 and N=3).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Strength:hedged· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Within anxiety disorders, PTSD was associated with severe alterations of sleep continuity, sleep depth and REM variables, while panic disorder was characterized by poor sleep efficiency, latency and quantity only.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Children with autism presented poorer sleep continuity compared to controls, but no alterations in sleep depth and REM pressure.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Sleep depth was altered in affective, anxiety and schizophrenia disorders.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Meta-analyses computations
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“When considering only young patients aged less than 18 years old, results showed a slight disruption of sleep continuity in those with depression compared to controls, while no alteration in sleep depth and REM sleep pressure was observed.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Affective disorders
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“autistic disorder was correlated with both sleep discontinuity and shorter duration of REM sleep.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Pervasive developmental disorders
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Compared to main results, findings for elderly individuals with depression, indicated only a marginally significant increased REM density, and no longer altered duration of stages 1 and 2.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Patients with schizophrenia, compared to controls, showed poor sleep continuity and less deep sleep, but no increased REM sleep pressure.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Results suggest that sleep continuity,sleep depth and REM sleepdisturbances may be associated with this disorder.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Personality disorders
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Although REM latency was found to be reduced in this group of patients, no significant result was found when considering schizophrenia in the absence of comorbidities.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Considering each variable separately, results for REM latency, and REM duration showed no significance. S1 duration was also not impaired.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Comorbidity excluded
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Sleep depth and REM sleep pressure disturbances were altered in a smaller number of disorders and occurred rarely in a single condition in the absence of comorbidities.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Discussion
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Only marginal significant altered sleep continuity and an increased duration of stage 1 sleep (i.e. light sleep) was evidenced in this condition.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Eating disorders
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“REM variables are strongly altered in major depression, being the only disorder associated with alteration in all three REM variables included (REM latency, REM density and REM sleep duration).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Affective disorders
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Sleep continuity disturbances cut across current diagnostic entities and were found in all investigated disorders, with the exception of ADHD and seasonal affective disorder.”
- Also stated in: § Sleep and hyperarousal as dimensions for mental health · hedged
“Findings support the notion of transdiagnostic disruptions of sleep continuity, based on physiological (PSG) data.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Discussion
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
- Also stated in: § Sleep and hyperarousal as dimensions for mental health · hedged
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“reduction of sleep depth and increased REM sleep pressure were related to disorders comorbidity.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Discussion > Sleep and hyperarousal as dimensions for mental health
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes? Based: unclearIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“heterogeneity between the studies was often high (I2>70) and the sources of variability that we could directly investigate did not completely explain this high heterogeneity.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“results suggested sex differences in major depression, as well as different results in men sample compared to main analyses in anxiety disorders and schizophrenia.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Strength:hedged· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“Decades of research have shown that sleep disturbances are highly prevalent in mental disorders and have been associated with adverse effects for cognitive, emotional, and interpersonal functioning”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Introduction
What the sources say
- Not checked yetcites Kahn, Sheppes & Sadeh, 2013
- Not checked yetcites Rasch & Born, 2013
- Not checked yetcites Walker, 2009
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
In the paper
“The single exception was a REM density increase found exclusively in affective disorders, although analyses for this sleep parameter were limited to only some of the disorders due to an insufficient number of studies.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > PSG research in mental disorders psychopathology > The previous meta-analysis: Benca et al. 1992
What the sources say
- Not checked yetcites Benca et al., 1992
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
In the paper
“Results showed that patients presented with sleep alterations, as increased total time awake and shorter duration of stage 2 sleep during the night, even if never treated.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > PSG research in mental disorders psychopathology > PSG research in other mental disorders than major depression
What the sources say
- Not checked yetcites Chouinard, Poulin, Stip & Godbout, 2004
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
In the paper
“In addition, alterations in any of the sleep variables were not specifically linked to single disorders, thus questioning the specificity of any sleep variable for a particular mental disorder.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > PSG research in mental disorders psychopathology > The previous meta-analysis: Benca et al. 1992
What the sources say
- Not checked yetcites Benca et al., 1992
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
In the paper
“The results confirmed REM density as a possible biological marker for the disorder: more specifically, the authors suggested that major depression may be related to a combination of diminished SWS duration and increased REM density.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > PSG research in mental disorders psychopathology > PSG research in major depression
What the sources say
- Not checked yetcites Pillai, Kalmbach & Ciesla, 2011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
In the paper
“After these pioneer studies, PSG research in major depression continued producing a rich literature, which however is limited by many conflicting findings, probably due to modest sample sizes and methodological variance between studies”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > PSG research in mental disorders psychopathology > PSG research in major depression
What the sources say
- Not checked yetcites Swanson, Hoffmann & Armitage, 2010
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“PSG research in psychopathology started in the 1960s with studies showing that major depression was characterized by alterations of sleep continuity, shortened time in SWS and increased REM sleep pressure, i.e. longer REM sleep duration, shortened REM latency, a prolongation of the first REM period, and increased REM density”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > PSG research in mental disorders psychopathology > PSG research in major depression
What the sources say
- Not checked yetcites Riemann et al., 1994
- Not checked yetcites Berger & Riemann, 1993
- Not checked yetcites Lauer et al., 1991
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“All subtypes were considered together, and no further analysis considering subtypes separately could be conducted due to a lack of a sufficient number of studies.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Data extraction
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“All studies were estimated to address a clear focused issue and use an appropriate method to answer to the research’s questions (1 & 2).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Quality assessment
Strength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“We considered these two disorders only separately to evaluate possible differences depending on the degree of cognitive impairment.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Data extraction
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
In the paper
“This meta-analysis followed MOOSE (Meta-analysis Of Observational Studies in Epidemiology) guidelines”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods
What the sources say
- Not checked yetcites Stroup et al., 2000
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
None of the sources cited for this claim have been checked yet.
In the paper
“Diagnosis of mental disorders based on DSM-IV (APA, 1994) or ICD-10 (WHO, 2010)”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Study selection
What the sources say
- Not checked yetcites APA, 1994
- Not checked yetcites WHO, 2010
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“All included studies measured and scored PSG through standard sleep scoring criteria.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Quality assessment
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“For this category we searched exclusively for Attention-deficit/hyperactivity disorder (ADHD).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Data extraction
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Considering our final sample of studies (see Results for details), separate analyses for specific affective disorders were possible to be conducted only for major depression and seasonal affective disorder.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Data extraction
Strength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Global quality scores ranged between 5 and 11.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Quality assessment
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Eighty-one studies (of 91) based patients’ diagnoses on validated clinical interview, while 10 studies used validated questionnaires.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Quality assessment
Strength:plain· not yet calibratedn = 91Tests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“However, for this last condition, only 2 studies were selected in the final database, thus it was not evaluated in meta-analytic computations.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Data extraction
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“Robust Variance Estimation (RVE, R package “robumeta”) was used to cater for potentially statistically dependent effect sizes (e.g. Hedges, Tipton, & Johnson, 2010; Tanner-Smith & Tipton, 2014).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Statistical analyses: Meta-analytic calculations
What the sources say
- Not checked yetcites Hedges, Tipton, & Johnson, 2010
- Not checked yetcites Tanner-Smith & Tipton, 2014
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Inclusion of a healthy control group”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Study selection
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
In the paper
“For quality assessment, we referred to Section A of the Critical Appraisal Skills Programme Tool for Case-Control studies (Bradley & Hill, 2001).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Quality assessment
What the sources say
- Not checked yetcites Bradley & Hill, 2001
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Sixty-five studies provided detailed information on mental disorders comorbidity.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Quality assessment
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Publication bias was assessed both graphically by using funnel plots and numerically by considering the classical safe-fail number for each significant result evidenced by main analyses.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Statistical analyses: Meta-analytic calculations
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Before performing each meta-analysis, we identified possible outliers by exploring standardized residuals. Studies with standardized residuals > |3|were winsorized, i.e. residuals were reduced to = +/−3.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Statistical analyses: Meta-analytic calculations
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
In the paper
“To test for heterogeneity, chi-squared tests and the I2 statistic derived from the chi-squared values were used (Borenstein, Hedges, Higgins & Rothstein, 2009).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Statistical analyses: Meta-analytic calculations
What the sources say
- Not checked yetcites Borenstein, Hedges, Higgins & Rothstein, 2009
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Six studies of 91 followed slightly different procedural protocols for cases and controls.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Quality assessment
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Analyses could be computed only for panic disorder and Post-Traumatic Stress Disorder (PTSD).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Data extraction
Strength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Meta-analyses were performed when at least 3 studies were available.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Statistical analyses: Meta-analytic calculations
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
None of the sources cited for this claim have been checked yet.
In the paper
“For this method, results with degrees of freedom < 4 could indicate too few cases for reliable variance estimation.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Statistical analyses: Meta-analytic calculations
What the sources say
- Not checked yetcites Hedges, Tipton, & Johnson, 2010
- Not checked yetcites Tanner-Smith & Tipton, 2014
Strength:hedged· not yet calibratedCausal:conditional· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Possible sources of variability between the studies were controlled through meta-analytic subgroup analyses whenever a sufficient number of studies was available for the subgroup. Sex, age, and mental disorders comorbidity were considered for subgroup analysis.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Statistical analyses: Meta-analytic calculations
Strength:plain· not yet calibratedCausal:direct· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“The random-effects model was used because of the considerable heterogeneity between studies (different populations, different settings, etc.).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Statistical analyses: Meta-analytic calculations
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“All studies included in this category focused on anorexia nervosa.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Data extraction
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Non-overlap of samples across studies”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Study selection
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“As shown in Table 1, median scores for most disorder categories ranged between 8 and 9.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Quality assessment
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Analyses for women were possible for affective disorders, depression, and anorexia nervosa.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“All studies excluded the first night from the analyses as this was an exclusion criterion of our meta-analysis, apart from one study which was included as the authors specifically reported that they tested that the exclusion of the first night from the analyses did not change the results”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Quality assessment
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“Sleep, considered as a fundamental operating state of the central nervous system, and occupying up to a third of the human life span, may be one of the most important basic dimensions of brain function and mental health”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep disturbances as transdiagnostic and dimensional
What the sources say
- Not checked yetcites Regier et al., 2012
- Not checked yetcites Harvey et al., 2011
Strength:hedged· not yet calibratedTests✓ Asserted: passes✗ Checkable: fails✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. It may be too vague to check against evidence. The paper’s conclusions may not depend on it.
None of the sources cited for this claim have been checked yet.
In the paper
“Use of standard sleep scoring criteria (Iber et al., 2007; Rechtschaffen & Kales, 1968)”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Study selection
What the sources say
- Not checked yetcites Iber et al., 2007
- Not checked yetcites Rechtschaffen & Kales, 1968
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Current episode of mental disorder at the time of the PSG recordings”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Study selection
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“About half of the studies (49 of 91) specify that scorers were blind to group assignment, while the remaining 42 either not specify this information or conducted no blind scoring.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Quality assessment
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“We did not include data from unpublished studies in order to focus on those with the most rigorous research methodology subject to peer review.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Study selection
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Exclusion of the first sleep laboratory night (i.e. adaptation night) from the analysis”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Study selection
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Of note, by searching for antisocial personality disorder, we found a study evaluating polysomnography in patients with conduct disorder, which was added in the externalizing disorders category and described in this systematic review. However, this study was not considered in meta-analytic computations.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Data extraction
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Discontinuation of psychoactive medication for at least 1 week before and during the PSG examination”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Methods > Study selection
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Of note, REMD could not be calculated for anxiety and autistic disorders.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Comorbidity excluded
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“We could not perform meta-analyses for generalized anxiety disorder, obsessive compulsive disorder nor phobias.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Anxiety disorders
Strength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“increased REM activity and time are related with suicidal behaviors in individuals with depression (Sabo, Reynolds, Kupfer & Berman, 1991) and in psychotic patients (Keshavan et al., 1994).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Affective disorders
What the sources say
- Not checked yetcites Sabo, Reynolds, Kupfer & Berman, 1991
- Not checked yetcites Keshavan et al., 1994
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“These different alterations show that the two disorders present a different sleep physiology indicating that they may be better included in different categorizations.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Anxiety disorders
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“This may indicate either biological sex differences in the disorder or social differences.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Affective disorders
Strength:hedged· not yet calibratedCausal:conditional· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“This fits the meta-structure of the current DSM-5 (APA, 2015), that separates PTSD from anxiety disorders, including panic disorder, into different chapters (Regier et al., 2012).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Anxiety disorders
What the sources say
- Not checked yetcites APA, 2015
- Not checked yetcites Regier et al., 2012
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Sleep architecture and REM sleep variables may be associated with neurobiological pathways underlying different alterations of emotional and cognitive processes, thus, leading to distinct symptoms associations.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Discussion
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim. It may state two separate claims as one.
- Rests on an assumption: Sleep-related neural pathways are closely connected and partly overlap with pathways that regulate affect, cognition, and other important brain functions.
- Rests on an assumption: Sleep architecture and REM variables are related to cognitive and emotional functioning.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Separate analyses for the elderly group were possible to be conducted only for major depression.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Subgroup analyses
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“The extent of sleep continuity disturbances and their transdiagnostic character foster the concept that the systematic treatment of sleep continuity disturbances in clinical settings may help to improve the course of major mental disorders.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Tests✓ Asserted: passes✗ Checkable: fails✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim. It may be too vague to check against evidence.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Fifty-four funnel plots were visually inspected and related fail-safe classical numbers were calculated for the corresponding significant findings.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Publication bias
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“ADHD being a disorder associated with rather hypoarousal instead of hyperarousal, this may explain the results.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Externalizing disorders
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim. It may state two separate claims as one.
- Rests on an assumption: ADHD is associated with hypoarousal rather than hyperarousal.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“We could run these analyses for affective, anxiety, autistic, schizophrenia disorders, depression and ADHD.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Results > Comorbidity excluded
Strength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“diverse constellations of sleep architecture and REM sleep alterations may underline specific comorbidities in psychopathology and clarify why some disorders often present together.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Discussion > Sleep and hyperarousal as dimensions for mental health
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“insomnia, the most prevalent sleep continuity disorder, is known to be highly comorbid with mental and somatic disorders and to increase the risk of some of them, as for example major depression (Baglioni et al., 2011), suicidal behaviors (Biøngaard, Bjerkeset, Romundstad & Gunnel, 2011) and cardiovascular disease (Laugsand, Strand, Platou, Vatten & Janszky, 2013).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Discussion > Sleep and hyperarousal as dimensions for mental health
What the sources say
- Not checked yetcites Baglioni et al., 2011
- Not checked yetcites Biøngaard, Bjerkeset, Romundstad & Gunnel, 2011
- Not checked yetcites Laugsand, Strand, Platou, Vatten & Janszky, 2013
Strength:boosted· not yet calibratedCausal:direct· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Our results suggest that sleep could be investigated within the RDoC concept as a likely basic dimension in mental health.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Discussion > Sleep and hyperarousal as dimensions for mental health
Load-bearingStrength:hedged· not yet calibratedTests✓ Asserted: passes✗ Checkable: fails✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim. It may be too vague to check against evidence.
None of the sources cited for this claim have been checked yet.
In the paper
“central cholinergic activity and supersensitivity, responsible for the generation of rapid eye movements, may be excessively increased in depression and may represent a relevant neurobiological factor in the regulation of affect.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Affective disorders
What the sources say
- Not checked yetcites Palagini, Baglioni, Ciapparelli, Gemignani, & Riemann, 2013
- Not checked yetcites Nissen et al., 2006
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“the National Institute of Mental Health (NIMH) proposed the Research Domain Criteria (RDoC) Project (Morris, Rumsey & Cuthbert, 2014; Cuthbert & Kozak, 2013; Sanislow et al., 2010) to identify basic dimensions of brain/mind disorders to be studied across multiple units of analysis, from genes to neural circuits to behaviors.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Discussion > Sleep and hyperarousal as dimensions for mental health
What the sources say
- Not checked yetcites Morris, Rumsey & Cuthbert, 2014
- Not checked yetcites Cuthbert & Kozak, 2013
- Not checked yetcites Sanislow et al., 2010
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“treating sleep continuity difficulties at an early stage could interrupt the sequential process that gradually reduce the quality of life of people with insomnia and ends in the development of symptoms of psychopathology.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
- Rests on an assumption: There is a longitudinal association between insomnia and depression and mental disorders in general.
None of the sources cited for this claim have been checked yet.
In the paper
“DSM-5 (American Psychiatric Association, APA, 2013) follows a new approach, combining categorical and dimensional measurement (Kupfer et al., 2013; Regier et al., 2012).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Discussion > Sleep and hyperarousal as dimensions for mental health
What the sources say
- Not checked yetcites Kupfer et al., 2013
- Not checked yetcites Regier et al., 2012
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Subgroup analyses focusing on pediatric patients with major depression suggest that the disorder may be less severe in the developmental age, thus it could be possible that clinical interventions may be more effective in early age compared to adult groups.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Strength:hedged· not yet calibratedCausal:conditional· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it. It may state two separate claims as one.
- Rests on an assumption: Sleep is related to developmental outcomes, including brain maturation, learning, memory, temperament, emotional regulation, relational skills, and physical wellbeing.
- Rests on an assumption: Interventions in early age may have a large impact across the lifespan.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“We could not run analyses for conditions such as bipolar disorder or generalized anxiety disorder.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Load-bearingStrength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“The available data did not allow consideration of sleep within the context of circadian organization of the sleep-wake cycle.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“This may have obscured important windows into mental disorders pathophysiology.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Strength:hedged· not yet calibratedCausal:conditional· not yet calibratedTests✓ Asserted: passes✗ Checkable: fails✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. It may be too vague to check against evidence. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“only a few analyses could be conducted for sex subgroups.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Strength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“PSG research is still largely focusing on major depression, while other mental disorders have been rarely evaluated.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“we could run only few analyses for REM density”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Strength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“This could however not be tested in our analyses due to insufficient data.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Strength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Some sleep variables have been less frequently considered than others.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
In the paper
“It could be possible that mental disorders differ for circadian timing of major sleep periods and naps, as we know that this explains for example, at least in part, age changes (Cajochen, Münch, Knoblauch, Blatter & Wirz-Justice, 2006).”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
What the sources say
- Not checked yetcites Cajochen, Münch, Knoblauch, Blatter & Wirz-Justice, 2006
Strength:hedged· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“it is likely that comorbidity with depression was frequent in most PTSD studies and could have influenced results.”
§ SLEEP AND MENTAL DISORDERS: A META-ANALYSIS OF POLYSOMNOGRAPHIC RESEARCH > Sleep in each mental disorder category > Schizophrenia
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
The paper relies on this without support.
The sleep characteristics of mental disorders have not been sufficiently described, with data limited by methodological variance for major depression and scarce for most other disorders.
“Surprisingly, however, sleep characteristics of mental disorders have not yet been sufficiently described, with data being either limited by methodological variance as for major depression or scarce as for most other disorders.”
The paper relies on this without support.
Comorbidity is more often the rule than the exception in clinical settings, so many patients with depression have mixed clinical profiles.
“Comorbidity being rather the rule than the exception in clinical settings, it is likely that many patients with depression present mixed clinical profiles.”
The paper relies on this without support.
Apart from schizophrenia, sleep characteristics of mental disorders other than major depression have been little investigated.
“Moreover, apart from this relevant work on sleep in patients with schizophrenia, sleep characteristics associated with mental disorders different from major depression have been little investigated.”
The paper relies on this without support.
Whether sleep variables represent genetic or biological markers of distinct mental disorders remains unclear.
“Thus, the answer to the question whether sleep variables represent genetic/biological markers of distinct mental disorders is still not clear.”
The authors state this as an assumption.
Each sleep variable could be specifically altered in one disorder only.
“Based on the endophenotypic approach, each sleep variable could be specifically altered in one disorder only.”
The paper relies on this without support.
Sleep-related neural pathways are closely connected and partly overlap with pathways that regulate affect, cognition, and other important brain functions.
“Sleep neural pathways are closely connected and in part overlap with neural pathways regulating affect, cognition and other important brain functions.”
The paper relies on this without support.
A strict categorical approach in psychopathology underestimates reciprocal influences among neuropsychobiological mechanisms.
“The strict categorical approach in psychopathology underestimates the reciprocal influences of neuropsychobiological mechanisms.”
The paper relies on this without support.
Comorbidity is the rule rather than the exception in mental disorders.
“Comorbidity is indeed the rule and not the exception in mental disorders”
The paper relies on this without support.
ADHD is associated with hypoarousal rather than hyperarousal.
“ADHD being a disorder associated with rather hypoarousal instead of hyperarousal”
The paper relies on this without support.
Sleep is related to developmental outcomes, including brain maturation, learning, memory, temperament, emotional regulation, relational skills, and physical wellbeing.
“Sleep has been related to development’s outcomes, being linked to brain maturation, learning, memory, temperament, emotional regulation, relational skills, and physical wellbeing.”
The paper relies on this without support.
Interventions in early age may have a large impact across the lifespan.
“interventions in early age may have a great impact across the life-span.”
The paper relies on this without support.
PSG studies are unlikely to omit negative findings for single variables because it is common to include a table of means and standard deviations for common sleep variables.
“PSG studies unlikely do not report negative findings for single variables, as it is common use to include in the manuscript a table with means and standard deviations value for a list of common sleep variables.”
The paper relies on this without support.
Sleep architecture and REM variables are related to cognitive and emotional functioning.
“As sleep architecture and REM variables are related with cognitive and emotional functioning”
The paper relies on this without support.
There is high comorbidity between schizophrenia and depression.
“the high comorbidity between schizophrenia and depression”
The paper relies on this without support.
There is a longitudinal association between insomnia and depression and mental disorders in general.
“considering the longitudinal association between insomnia and depression and mental disorders in general”
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
The source backs part of the claim, not all of it — or backs it for a different population, condition or comparison.
In the citing paper
“When sleep is disrupted or insufficient, these neurocognitive processes may be compromised, leading to reduced attentional control, slower information processing, and difficulties with learning and academic engagement (Baglioni et al., 2016; Wickens et al., 2015).”
From The Effect of Sleep Quality on Academic Performance: A Systematic Review and Meta-Analysis Study (2026) · cites this paper as Baglioni et al., 2016
Experimental — accuracy not yet measuredThe source backs part of the claim, not all of it — or backs it for a different population, condition or comparison.
In the citing paper
“Additionally, poor sleep quality is associated with psychological problems in adolescents, such as anxiety and depression (Baglioni et al., 2016).”
From The Effect of Sleep Quality on Academic Performance: A Systematic Review and Meta-Analysis Study (2026) · cites this paper as Baglioni et al., 2016
Experimental — accuracy not yet measuredThe cited source says what the claim attributes to it.
In the citing paper
“poor sleep is associated with symptoms of depression and anxiety (1–12)”
The cited source says what the claim attributes to it.
In the citing paper
“For instance, systematic reviews have found that people with MDD are significantly more likely to engage in excessive alcohol and tobacco use131,132, and have a higher total food intake and reduced diet quality133, higher levels of sedentary behavior134, and poorer sleep continuity and quality135, compared to non-depressed people.”
From Comorbidity between major depressive disorder and physical diseases: a comprehensive review of epidemiology, mechanisms and management (2023) · cites this paper as [135]
In the citing paper
“Finally, access may be compromised by financial costs, fragmentation of care and stigma.124,126,129”
From The Lancet Psychiatry Commission: a blueprint for protecting physical health in people with mental illness (2019) · cites this paper as [129]
In the citing paper
“However, problems sleeping and mental health difficulties are also intrinsically linked [8,9].”
From Improving sleep quality leads to better mental health: A meta-analysis of randomised controlled trials (2021) · cites this paper as [9]
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Each contradiction between two passages listed here was confirmed by an independent check.
Schizophrenia REM-latency direction reverses
MajorThe results describe longer REM latency in schizophrenia, whereas the disorder-specific discussion says it was reduced. These are opposite directions for the same reported finding.
“Finally, schizophrenia was associated with alteration of sleep continuity, sleep architecture and longer REM latency.”
“Although REM latency was found to be reduced in this group of patients, no significant result was found when considering schizophrenia in the absence of comorbidities.”
Panic disorder is omitted from the continuity exceptions
MinorThe results explicitly exclude panic disorder from disorders with a sleep-continuity disturbance, but the discussion names only ADHD and seasonal affective disorder as exceptions.
“Sleep continuity disturbance were evidenced in all disorders, with the exception of seasonal affective disorder, panic disorder and ADHD.”
“Sleep continuity disturbances cut across current diagnostic entities and were found in all investigated disorders, with the exception of ADHD and seasonal affective disorder.”
Citations
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Metadata
- Authors
- Baglioni, C., Nanovska, S., Regen, W., Spiegelhalder, K., Feige, B., Nissen, C., Reynolds, C. F., & Riemann, D.
- Affiliations
- University of Freiburg (DE)
- University of Pittsburgh (US)
- ORCID
- Venue
- Psychological Bulletin
- Published
- 2016-09
- Volume
- 142
- Issue
- 9
- Pages
- 969-990
- ISSN
- 0033-2909 (ISSN-L)
- 1939-1455
- PMC
- PMC5110386
- OpenAlex
- W2469994275
- Cited by
- 1,074
- References
- 367
- Citations by year
- 2026: 121 · 2025: 152 · 2024: 148 · 2023: 125 · 2022: 151 · 2021: 122 · 2020: 113 · 2019: 70 · 2018: 42 · 2017: 28 · 2016: 2
- FWCI
- 6.21
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- Psychological Bulletin (publishedVersion, other-oa)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- University Medical Center of Freiburg
- National Institute of Mental Health (P30 MH90333)
- Topics
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
- Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
- Health Sciences › Medicine › Physiology (medical) › Obstructive Sleep Apnea Research
- Keywords
- sleep, mental illness, polysomnography, sleep continuity, sleep depth, REM sleep, transdiagnostic mechanisms, psychiatric comorbidity, mood disorders, anxiety disorders, autism spectrum disorder, schizophrenia, attention deficit hyperactivity disorder, pervasive developmental disorders, borderline personality disorder, antisocial personality disorder, eating disorders, arousal system
- MeSH terms
- Antisocial Personality Disorder, Anxiety Disorders, Feeding and Eating Disorders, Attention Deficit Disorder with Hyperactivity, Autistic Disorder, Mental Disorders, Borderline Personality Disorder, Child Development Disorders, Pervasive, Major Depressive Disorder, Humans, Schizophrenia, Schizophrenic Psychology, Sleep, Sleep Wake Disorders, Sleep, REM, Comorbidity, Polysomnography, Mood Disorders
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