Dementia prevention, intervention, and care: 2020 report of the Lancet Commission

In the paper

“A meta-analysis found variation of the rates of dementia within China, with a higher prevalence in the north and lower prevalence in central China, estimating 9·5 million people are living with dementia, whereas a slightly later synthesis estimated a higher prevalence of around 11 million.30, 32”

What the sources say

• Disputed

  Split into 2 atoms — 1 confirmed, 0 partially supported, 1 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

  Checked by a reasoning model — may be wrong.

  cites [30] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [32] source

In the paper

“Another US study234 followed up 663 people, mean age 77 years, 55% women. Caregiver depression rather than symptoms of people with dementia predicted emergency department use for people with dementia, with a 73% (RR 1·73, 95% CI 1·3–2·3) increase.234”

What the sources say

• Disputed

  Split into 2 atoms — 0 confirmed, 0 partially supported, 1 disputed, 0 misattributed, 1 unverifiable. Expand the claim to see per-atom verdicts.

  Checked by a reasoning model — may be wrong.

  cites [234] sourceExperimental — accuracy not yet measured

In the paper

“An RCT233 reporting 6-year follow-up after the eight session STrAtegies for RelaTives intervention—manual-based coping intervention delivered by supervised psychology graduates—found continuing effectiveness for depressive symptoms in carers (adjusted MD −2·00; 95% CI −3·4 to −0·6) and risk of case-level depression, with patient-related cost being approximately 3 times lower than those who did not”

What the sources say

• Disputed

  Split into 2 atoms — 0 confirmed, 0 partially supported, 1 disputed, 0 misattributed, 1 unverifiable. Expand the claim to see per-atom verdicts.

  Checked by a reasoning model — may be wrong.

  cites [233] sourceExperimental — accuracy not yet measured

In the paper

“People with dementia consult primary care less often238 and have fewer dental visits239 than those without dementia and their family members, if involved, often feel they lack knowledge to assist.240”

What the sources say

• ?Could not verify

  Citation 238 is attached to the claim that people with dementia consult primary care less often. The Methods section says all participants had consulted a primary care physician at least once, but it does not compare consultation frequency by dementia status. Searches for primary-care visit frequency and healthcare utilization found no such comparison; the dental-visit and family-knowledge claims are attached to other citations. (LLM, conf=0.73)

  cites [238] sourceExperimental — accuracy not yet measured
• ?Could not verify

  Citation 238 is attached to the claim that people with dementia consult primary care less often than people without dementia. The Discussion describes under-recognition and recording of dementia, while the Results report incidence; neither compares consultation frequency between the groups. Searches for consultations, GP visits, and primary-care service use found no such comparison in our copy. The dental-visits and family-knowledge clauses carry separate citations and are not judged here. (LLM, conf=0.76)

  cites [239] sourceExperimental — accuracy not yet measured
• Disputed

  Citation 238 is attached to the primary-care claim, not the statements about dental visits or family members. The Discussion says that, compared with controls, a larger proportion of people with dementia presents to a general practitioner, contrary to the claim that they consult primary care less often. Our copy does not give a comparison of visit frequency. (LLM, conf=0.85)

  Checked by a reasoning model — may be wrong.

  cites [240] sourceExperimental — accuracy not yet measured

In the paper

“One RCT compared care at a specialist medical and mental health unit to usual care for 600 confused people older than 65 years, acutely admitted to hospital and found no difference in the primary outcome of days spent at home or in hospital, but increased family satisfaction.292”

What the sources say

• Disputed

  Split into 2 atoms — 0 confirmed, 0 partially supported, 1 disputed, 0 misattributed, 1 unverifiable. Expand the claim to see per-atom verdicts.

  Checked by a reasoning model — may be wrong.

  cites [292] sourceExperimental — accuracy not yet measured

In the paper

“Most research data for this calculation came from HIC and there is a relative absence of specific evidence of the impact of risk factors on dementia risk in LMIC, particularly from Africa and Latin America.27”

What the sources say

• Partly supported

  Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

  cites [27] sourceExperimental — accuracy not yet measured

In the paper

“Calculations considering country-specific prevalence of the nine potentially modifiable risk factors indicate PAF of 40% in China, 41% in India and 56% in Latin America with the potential for these numbers to be even higher depending on which estimates of risk factor frequency are used.28, 29”

What the sources say

• Partly supported

  Split into 2 atoms — 0 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 1 unverifiable. Expand the claim to see per-atom verdicts.

  cites [28] sourceExperimental — accuracy not yet measured
• 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 [29] source

In the paper

“Diabetes is very common and cigarette smoking is rising in China while falling in most HIC.31”

What the sources say

• Partly supported

  The Results and Discussion (page numbers unavailable) report rising cigarette consumption per capita in China and declines in several high-income countries, including the US, Canada, Australia, and countries in western and northern Europe. They do not establish a decline in most high-income countries, and no passage addresses how common diabetes is. The paper measures cigarette consumption rather than the number or prevalence of people who smoke. (LLM, conf=0.86)

  cites [31] sourceExperimental — accuracy not yet measured

In the paper

“Models also suggest that there will be future increases both in the number of individuals who are independent and those with complex care needs.6”

What the sources say

• Supported

  The Abstract’s Interpretation states that the model projects increases in both independent individuals and those with complex care needs among people aged 65 or over in England over the next 20 years. This directly supports the citing sentence. (LLM, conf=0.95)

  cites [6] source

In the paper

“In contrast, age-specific dementia prevalence in Japan, South Korea, Hong Kong, and Taiwan looks as if it is increasing, as is Alzheimer's in LMIC, although whether diagnostic methods are always the same in comparison studies is unclear.5, 6, 7”

What the sources say

• Partly supported

  Section 3 (page unavailable) reports that reviews suggest increasing dementia prevalence in Japan, Korea, Hong Kong, and Taiwan, while warning that differences in diagnostic methods may affect comparisons. It does not establish age-specific increases in each place. Section 4.2 (page unavailable) cautions that evidence on trends in low- and middle-income countries is not robust; it does not report an increase in Alzheimer’s disease across those countries. (LLM, conf=0.84)

  cites [5] sourceExperimental — accuracy not yet measured
• ?Could not verify

  The Discussion reports falling dementia incidence or prevalence in the UK and USA and projects a rise in prevalence as those populations age. Our copy does not address age-specific trends in Japan, South Korea, Hong Kong, or Taiwan, Alzheimer’s trends in low- and middle-income countries, or the comparability of diagnostic methods; searches for those terms found no relevant passage. (LLM, conf=0.76)

  cites [6] sourceExperimental — accuracy not yet measured
• Partly supported

  The Results (Incidence of AD; page unavailable) report increasing Alzheimer’s disease incidence in non-Western cohorts aged 65–74, but not a significant increase in older groups. The paper analyzes incidence, not age-specific dementia prevalence in Japan, South Korea, Hong Kong, and Taiwan, and it does not equate its non-Western cohorts with low- and middle-income countries. The Discussion (page unavailable) acknowledges possible changes in AD identification but suggests that shifting diagnosis is unlikely to explain the increase. (LLM, conf=0.86)

  cites [7] sourceExperimental — accuracy not yet measured

In the paper

“Life course is important when considering risk, for example, obesity and hypertension in midlife predict future dementia, but both weight and blood pressure usually fall in later life in those with or developing dementia,9 so lower weight and blood pressure in later life might signify illness, not an absence of risk.11, 12, 13, 14”

What the sources say

• Partly supported

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

  cites [9] sourceExperimental — accuracy not yet measured
• Partly supported

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

  cites [11] sourceExperimental — accuracy not yet measured
• Partly supported

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

  cites [12] sourceExperimental — accuracy not yet measured

In the paper

“Exercise might reduce weight and diabetes risk, improve cardiovascular function, decrease glutamine, or enhance hippocampal neurogenesis.25”

What the sources say

• Partly supported

  The ‘Exercise and hippocampus: animal model’ section reports that voluntary exercise enhanced hippocampal neurogenesis in mice. The passages reviewed do not support the other attributed effects: reduced weight or diabetes risk, improved cardiovascular function, or decreased glutamine. (LLM, conf=0.88)

  cites [25] sourceExperimental — accuracy not yet measured

In the paper

“Modelling of the UK change suggests a 57% increase in the number of people with dementia from 2016 to 2040, 70% of that expected if age-specific incidence rates remained steady,10 such that by 2040 there will be 1·2 million UK people with dementia.”

What the sources say

• Partly supported

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

  cites [10] sourceExperimental — accuracy not yet measured

In the paper

“A consensus group, for example, has described hippocampal sclerosis associated with TDP-43 proteinopathy, as limbic-predominant age-related TDP-43 encephalopathy (LATE) dementia, usually found in people older than 80 years, progressing more slowly than Alzheimer's disease, detectable at post-mortem, often mimicking or comorbid with Alzheimer's disease.3”

What the sources say

• Partly supported

  The Introduction’s LATE-NC summary and the Background’s neuropathological-changes section support the age, autopsy-diagnosis, and comorbidity points; the clinical-trials section says LATE can mimic Alzheimer’s disease. The Clinical and neurocognitive features section offers only preliminary evidence of slower decline for relatively ‘pure’ LATE-NC versus ‘pure’ Alzheimer’s pathology. It says comorbid cases decline faster, so the unqualified progression claim overstates the source. Page numbers were not provided in our copy. (LLM, conf=0.88)

  cites [3] sourceExperimental — accuracy not yet measured

In the paper

“However, the age-specific incidence of dementia has fallen in many countries, probably because of improvements in education, nutrition, health care, and lifestyle changes.”

• Also stated in: § Prevention of dementia · hedged

  “All-cause dementia incidence is lower in people born more recently,7 probably due to educational, socio-economic, health care, and lifestyle changes.2, 5”

What the sources say

• Partly supported

  The Discussion (page not provided) reports declining dementia incidence in both Western and non-Western populations and discusses education, nutrition, medicine, smoking, and cardiovascular care as possible contributors. It calls these explanations postulated or possible, however, and says the mechanisms need further research; “probably because” expresses more causal confidence than the paper does. (LLM, conf=0.84)

  cites [7] sourceExperimental — accuracy not yet measured
• Partly supported

  The indexed Abstract says dementia is being delayed in some populations and identifies education and lifestyle factors that could help prevent or delay it. It does not establish that age-specific incidence has fallen in many countries or attribute such a fall to improvements in nutrition and health care. (LLM, conf=0.70)

  cites [2] sourceExperimental — accuracy not yet measured
• Partly supported

  The Conclusions (page not specified) report that dementia is declining age for age in some countries and suggest that better education, living conditions and access to health care likely contributed. Section 4.1 (page not specified) says dietary and other lifestyle changes are only possible explanations for declining incidence, with insufficient primary evidence to confirm them. The claim therefore overstates the evidence for nutrition and lifestyle as probable causes, and says “many countries” where the review says “some.” (LLM, conf=0.88)

  cites [5] sourceExperimental — accuracy not yet measured

In the paper

“All-cause dementia incidence is lower in people born more recently,7 probably due to educational, socio-economic, health care, and lifestyle changes.2, 5”

What the sources say

• Supported

  Citation 7 is attached to the claim that all-cause dementia incidence is lower in more recent birth cohorts, not to the proposed causes, which have separate citations. The Results (Incidence of Dementia) report significantly lower dementia incidence with later birth years in all three age groups. (LLM, conf=0.94)

  cites [7] source
• ?Could not verify

  No passage in our copy matched the claim, and searches for dementia-incidence trends, later-born cohorts, and possible explanations involving education or health found no relevant passage. Our copy therefore does not establish what this source says about the attributed claim. (LLM, conf=0.65)

  cites [2] sourceExperimental — accuracy not yet measured
• Partly supported

  Section 2.2 (Incidence trends; page unavailable) says all five studies suggest a potential decrease in dementia incidence across cohorts and time periods. The claim states the decrease without that uncertainty or the review’s qualification that the evidence comes from particular studied populations. The proposed causes are attached to other citations in the citing sentence, so they are not assessed here. (LLM, conf=0.85)

  cites [5] sourceExperimental — accuracy not yet measured

In the paper

“The term chronic traumatic encephalopathy describes sports head injury, which is not yet fully characterised and covers a broad range of neuropathologies and outcomes, with current views largely conjecture.73”

What the sources say

• Supported

  The Conclusions section says CTE awaits full characterization, encompasses a broad range of neuropathologies and outcomes after TBI, and quotes an assessment that views about brain injury in sport are often based more on supposition than fact. The paper discusses sports-related head injury, though it also makes clear that CTE is not limited to sports injuries. (LLM, conf=0.90)

  cites [73] source

In the paper

“Another study found a two-fold increase in episodic memory loss attributable to retirement (n=18 575, mean age 66 years), compared to non-retirees, adjusting for health, age, sex, and wealth.48”

What the sources say

• Partly supported

  The Results (Effect Sizes; page unavailable) report that episodic-memory decline was about 2.2 times as fast among retirees as among non-retirees. The Data section gives a sample of 18,575, and the Methods and Results describe adjustment for age, sex, health, and socioeconomic factors. But the reported mean age of 66.3 years is the age at retirement, not a stated mean age for the full sample; the two-fold figure describes the yearly rate of decline, not total memory loss. (LLM, conf=0.86)

  cites [48] sourceExperimental — accuracy not yet measured

In the paper

“It is difficult to separate out the specific impact of education from the effect of overall cognitive ability,38, 39 and the specific impact of later-life cognitive activity from lifelong cognitive function and activity.39, 40”

What the sources say

• Supported

  The Summary (page unavailable) cautions that education and cognitive-intellectual activities are correlated with early-adult intellectual capacity, making their separate effects on later-life cognition difficult to interpret. The Discussion (page unavailable) likewise calls for random assignment in studies of later-life educational activities to rule out reverse causation. (LLM, conf=0.87)

  cites [38] source
• ?Not checked — no full text of the sourcecites [39] source
• Supported

  The Strengths and Limitations section (page not available) says baseline cognitive capacity and the duration and intensity of intellectual activity before the study were unknown. It therefore supports the cited point that the specific effect of later-life activity is difficult to separate from earlier cognitive function and activity. (LLM, conf=0.90)

  cites [40] source

In the paper

“Good evidence exists for all these risk factors although some late-life factors, such as depression, possibly have a bidirectional impact and are also part of the dementia prodrome.33, 34”

What the sources say

• ?Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  cites [33]
• Partly supported

  The Discussion reports that late-life depressive symptoms emerge roughly a decade before dementia diagnosis, supporting their possible role in the dementia prodrome. It considers a causal effect of depression as an alternative explanation, but says the study’s findings do not support depressive symptoms increasing dementia risk. The proposed bidirectional impact is therefore not supported as a finding of this paper. (LLM, conf=0.88)

  cites [34] sourceExperimental — accuracy not yet measured

In the paper

“People in more cognitively demanding jobs tend to show less cognitive deterioration before, and sometimes after retirement than those in less demanding jobs.43, 44”

What the sources say

• ?Not checked — no full text of the sourcecites [43] source
• Supported

  The Discussion reports that higher employment grade was associated with slower verbal-memory decline while participants were working, but that this protection disappeared after retirement. It also reports another study’s finding of less steep decline both before and after retirement in more mentally demanding jobs, supporting the claim’s qualified 'sometimes after' wording. (LLM, conf=0.87)

  cites [44] source

In the paper

“New work suggests overall cognitive ability increases, with education, before reaching a plateau in late adolescence, when brain reaches greatest plasticity; with relatively few further gains with education after age 20 years.38”

What the sources say

• Partly supported

  The Abstract suggests that education-related gains in cognitive ability plateau in late adolescence or early adulthood, and the Discussion reports little additional effect of education after age 20. The Discussion describes substantial brain development during childhood and adolescence, but does not say that brain plasticity is greatest in late adolescence. (LLM, conf=0.86)

  cites [38] sourceExperimental — accuracy not yet measured

In the paper

“Three systematic reviews in the general population found no evidence of generalised cognition improvement from specific cognitive interventions, including computerised cognitive training, although the domain trained might improve.52, 53, 54”

What the sources say

• ?Not checked — no full text of the sourcecites [52] source
• ?Not checked — no full text of the sourcecites [53] source
• Partly supported

  The Authors’ conclusions (page unavailable) say the review could not determine whether computerised cognitive training maintains global cognition in healthy adults in midlife. The Discussion (page unavailable) reports a possible small improvement in executive function, but the sole eligible trial did not measure global cognition. The claim extends this limited finding to the general population and to cognitive interventions beyond the computerised training assessed here. (LLM, conf=0.84)

  cites [54] sourceExperimental — accuracy not yet measured

In the paper

“Subsequently, a 12-year study of 1658 people found older retirement age but not number of years working, was associated with lower dementia risk.46”

What the sources say

• Supported

  The Abstract (Participants and Measurements) identifies 1,658 participants at baseline and a 12-year follow-up. The Results (Association between retirement age, working years and dementia risk) report that later retirement age was associated with lower dementia risk, while the number of working years was not. The final study sample was 1,618 after exclusions (Results, Sample Characteristics). (LLM, conf=0.90)

  cites [46] source

In the paper

“Higher childhood education levels and lifelong higher educational attainment reduce dementia risk.2, 35, 36, 37”

What the sources say

• ?Could not verify

  The only matching passage returned is labelled Abstract; it says more childhood education could contribute to preventing or delaying dementia, but an abstract is not admissible evidence under this rubric. Searches for lifelong educational attainment, low education, and related terms found no relevant full-text passage in our copy. (LLM, conf=0.70)

  cites [2] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [35] source
• Partly supported

  The Results (page not provided) report that dementia incidence declined over three decades among participants with a high school diploma, but not among those without one. The Methods (page not provided) classify education only by high school diploma status; the paper does not examine childhood education or lifelong attainment. The Discussion says rising education levels *might* have contributed to later dementia onset, not that higher attainment itself reduces risk. (LLM, conf=0.86)

  cites [36] sourceExperimental — accuracy not yet measured

In the paper

“In the 2017 Commission, we found an RR of 1·9 for dementia in populations followed up over 9–17 years, with the long follow-up times making reverse causation bias unlikely.2”

What the sources say

• ?Could not verify

  The retrieved copy contains repository metadata rather than a passage reporting dementia risk. Searches for the RR, 9–17-year follow-up, and reverse causation found no relevant passage, so the claim cannot be checked against the available text. (LLM, conf=0.72)

  cites [2] sourceExperimental — accuracy not yet measured

In the paper

“Similarly, engaging in intellectual activity as adults, particularly problem solving, for 498 people born in 1936, was associated with cognitive ability acquisition, although not the speed of decline.42”

What the sources say

• Supported

  The Abstract (Participants) identifies 498 volunteers born in 1936. The Abstract (Results) reports that intellectual engagement, especially problem solving, was associated with life-course cognitive gains but did not influence the trajectory of age-related decline. Page numbers are not provided in our copy. (LLM, conf=0.93)

  cites [42] source

In the paper

“A cross-sectional study of 6451 individuals designed to be representative of the US population, with a mean age of 59·4 years, found a decrease in cognition with every 10 dB reduction in hearing, which continued to below the clinical threshold so that subclinical levels of hearing impairment (below 25 dB) were significantly related to lower cognition.59”

What the sources say

• Partly supported

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

  cites [59] sourceExperimental — accuracy not yet measured

In the paper

“This suggests cognitive stimulation is more important in early life; much of the apparent later effect might be due to people of higher cognitive function seeking out cognitively stimulating activities and education.38”

What the sources say

• Supported

  The Summary says education’s cognitive benefits may plateau by late adolescence or early adulthood and that reducing later-life decline may begin with improving earlier education. The Discussion identifies reverse causation as the most parsimonious explanation: people with higher intellectual capacity tend to pursue more education and cognitive-intellectual activities. The claim preserves the paper’s tentative framing. (LLM, conf=0.93)

  cites [38] source

In the paper

“Similarly, a Swedish cohort of over 3 million people aged 50 years or older, found TBI increased 1-year dementia risk (OR 3·5, 95% CI 3·2–3·8); and risk remained elevated, albeit attenuated over 30 years (1·3, 1·1–1·4).68”

What the sources say

• Supported

  The Materials section describes a Swedish cohort considered for inclusion of 3,329,360 people aged 50 or older. Results (Table 2) report an adjusted OR of 3.52 (95% CI 3.23–3.84) in the first year after TBI and 1.25 (1.11–1.41) at 30 years or more, matching the cited rounded figures. These are associations, not evidence that TBI caused dementia. (LLM, conf=0.92)

  cites [68] source

In the paper

“Single, severe TBI is associated in humans, and mouse models, with widespread hyperphosphorylated tau pathology, and mice with APOE ε4 compared to APOE ε3 allele have more hippocampal hyper-phosphorylated tau after TBI.64, 65”

What the sources say

• Partly supported

  The Discussion and Results report widespread phosphorylated tau pathology in some people surviving a single moderate or severe TBI and progressive spread after severe TBI in wild-type mice. Our copy does not report an APOE ε4 versus ε3 comparison or greater hippocampal phosphorylated tau in ε4 mice after TBI (searched: APOE, apolipoprotein E, ε4 and ε3). (LLM, conf=0.90)

  cites [64] sourceExperimental — accuracy not yet measured
• Partly supported

  The Results section on hippocampal pTau reports significantly higher levels after blast exposure in ApoE4 mice than in ApoE3 mice. The Introduction mentions tau pathology in human TBI cases and animal models, but does not establish the claim about widespread hyperphosphorylated tau after a single, severe TBI. The Discussion describes this study as using repetitive blast exposure, and the Results say its pTau changes were confined to the hippocampus (page numbers unavailable). (LLM, conf=0.88)

  cites [65] sourceExperimental — accuracy not yet measured

In the paper

“Heavy drinking is associated with brain changes, cognitive impairment, and dementia, a risk known for centuries.”

What the sources say

• Supported

  The Discussion states that heavy alcohol use was associated with changes in brain structures, cognitive and executive impairments, and increased risk of all types of dementia. This directly supports the quoted claim. (LLM, conf=0.94)

  cites [102] source

In the paper

“The evidence has subsequently been strengthened by a study on Scottish former soccer players reporting that they are more likely than controls to have Alzheimer's disease specified on their death certificates (HR 5·1, 95% CI 2·9–8·8) and to have been prescribed any dementia-related medications (OR 4·9, 95% CI 3·8–6·3) but not on medical records.74”

What the sources say

• Partly supported

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

  cites [74] sourceExperimental — accuracy not yet measured

In the paper

“However another analysis did not find a protective effect of metformin for incident dementia (three studies, RR 1·1, 95% CI 0·5–2·4) with possible harm with insulin therapy (1·2, 1·1–1·4); but this did not account for severity of diabetes of those with type 2 diabetes on insulin.”

What the sources say

• Supported

  The Results (Metformin) report that three pooled studies found no significant difference in incident dementia risk (RR 1.08; 95% CI 0.49–2.36), matching the rounded figures in the citing sentence. The Results (Insulin) report increased risk (RR 1.21; 95% CI 1.06–1.39), while the Discussion cautions that diabetes duration and severity may explain the association. (LLM, conf=0.94)

  cites [99] source

In the paper

“Four meta-analyses of blood pressure medications to lower high blood pressure with six studies overlap have provided combined estimates of effects. All meta-analyses suggest reduced dementia in those in the interventions arms for outcomes of any dementia as well as clinically diagnosed Alzheimer's disease.”

What the sources say

• Partly supported

  The main text (page not available) reports a meta-analysis of blood-pressure-lowering trials with a lower pooled risk of dementia. It does not report four meta-analyses, six overlapping studies, or a pooled result for clinically diagnosed Alzheimer’s disease. (LLM, conf=0.87)

  cites [81] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [82] source
• ?Not checked — no full text of the sourcecites [83] source

In the paper

“A further cohort study has provided potential insights into mechanisms, reporting that midlife hypertension, defined as from age 40 years, was associated with reduced brain volumes and increased white matter hyperintensity volume but not amyloid deposition.”

What the sources say

• Supported

  The Abstract Findings report that higher blood pressure in midlife was associated with greater white matter hyperintensity volume and smaller brain volumes at ages 69–71, while neither blood pressure nor its change predicted amyloid-β status. The Abstract Interpretation places the relevant monitoring period around age 40; the claim's age is approximate rather than an exact study cutoff. (LLM, conf=0.90)

  cites [76] source

In the paper

“Of note, blood pressure declines in later life and this decline is associated with and, potentially caused by, dementia development (HR 2·4, 95% CI 1·4–4·2).”

What the sources say

• Partly supported

  The Abstract reports that a steep systolic blood-pressure decline from mid- to late life was associated with incident dementia (HR 2.40, 95% CI 1.39–4.15), but specifically among people with low-to-normal midlife blood pressure. The Discussion says reverse causality may explain the association because blood pressure can decline in early dementia. The citing sentence omits that population restriction and implies a general decline in blood pressure in later life, which this study does not establish. (LLM, conf=0.88)

  cites [12] sourceExperimental — accuracy not yet measured
• ?Could not verify

  The Discussion reports that elevated systolic blood pressure at age 50, but not at age 60 or 70, was associated with dementia risk. It does not report that blood pressure declines in later life, link such a decline to dementia development, or give the cited HR 2.4 (95% CI 1.4–4.2); searches for blood-pressure decline, reverse causation, and those figures found no supporting passage. (LLM, conf=0.76)

  cites [13] sourceExperimental — accuracy not yet measured
• Partly supported

  The discussion (page not available in our copy) says late-life blood-pressure declines can precede dementia and that early neurological changes may be responsible, while explicitly leaving the direction of causation uncertain. The Incident Dementia results report an association specifically for midlife hypertension followed by late-life hypotension, not late-life decline generally. They give an adjusted HR of 1.62 (95% CI 1.11–2.37), not the cited HR of 2.4 (1.4–4.2). (LLM, conf=0.88)

  cites [77] sourceExperimental — accuracy not yet measured

In the paper

“The first included 39 RCTs with an unclear total number of participants examining moderate or vigorous exercise of any frequency lasting 45–60 min per session in cognitively normal adults aged older than 50 years. This analysis reported global cognitive improvements (standard mean difference [SMD]=0·3, 95% CI 0·2–0·4) for moderate or vigorous resistance (13 studies) or aerobic exercise (18 studies”

What the sources say

• Partly supported

  The Results report 39 studies in the review, including 18 aerobic and 13 resistance-training studies; the Effect of exercise on cognition section reports an overall SMD of 0.29 (95% CI 0.17–0.41) across 36 studies. The Exercise moderators section reports positive estimates for aerobic and resistance exercise and no statistically significant estimate for yoga (p=0.27), not proof of no yoga effect. The review included participants with and without mild cognitive impairment, so its overall estimate is not limited to cognitively normal adults; it also does not establish that aerobic and resistance exercise have identical effects. (LLM, conf=0.86)

  cites [93] sourceExperimental — accuracy not yet measured

In the paper

“The UK Whitehall study, in a follow-up of 10 189 people, reports that in late life these symptoms increase dementia risk but not at younger ages (follow-up 11 years HR 1·7; 95% CI 1·2–2·4; follow-up 22 years 1·0, 0·7–1·4).”

What the sources say

• Partly supported

  The Results report the cited 11-year and 22-year hazard ratios in 10,189 participants, supporting a late-life association but not an earlier-life one. The Discussion cautions that depressive symptoms may be a prodromal feature of dementia or share common causes with it, and explicitly says the findings do not support the hypothesis that depressive symptoms increase dementia risk. (LLM, conf=0.88)

  cites [34] sourceExperimental — accuracy not yet measured
• Partly supported

  The Discussion (page unavailable) reports that depression was associated with dementia in this paper’s cohort of older men, chiefly during the first five years of follow-up. It does not report a UK Whitehall study of 10,189 people, the stated 11- and 22-year hazard ratios, or a comparison of symptoms at younger and older ages; the Discussion says age of symptom onset was unavailable. (LLM, conf=0.87)

  cites [117] sourceExperimental — accuracy not yet measured

In the paper

“sleep disturbance has been linked with β-amyloid (Aβ) deposition,131, 132 reduced glymphatic clearance pathways activation,133 low grade inflammation, increased Tau, hypoxia132, 134 and cardiovascular disease.135”

What the sources say

• ?Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  cites [131]
• ?Not checked — no full text of the sourcecites [132] source
• Partly supported

  Part I (‘Sleep deprivation exacerbates Aβ pathology,’ ‘Control of Aβ levels by the sleep–wake cycle,’ and ‘Sleep deprivation mediates Aβ-independent neuronal injury’; page unavailable) links poor sleep with Aβ plaques, sleep-enhanced glymphatic clearance of injected Aβ in mice, and tau phosphorylation. Part II (‘Circadian rhythms are critical to human health’; page unavailable) reports an association between disturbed circadian rhythms and coronary disease. The passages do not establish the claimed links with low-grade inflammation or hypoxia; glymphatic clearance is discussed as a possible mechanism rather than demonstrated for endogenous Aβ. (LLM, conf=0.87)

  cites [133] sourceExperimental — accuracy not yet measured

In the paper

“Differences persisted in studies that adjusted for education and physical health so might be attributable to married people having more social contact, rather than solely because they tend to have better physical health and more education, although residual confounding is possible.”

What the sources say

• Supported

  The Discussion (page not provided) says that increased dementia risk for lifelong single people remained after adjustment for education and physical health, and suggests differences in social engagement as an explanation. It also acknowledges that the review could assess only confounders measured in the included studies, leaving residual confounding possible. (LLM, conf=0.88)

  cites [120] source

In the paper

“It reported obesity (BMI ≥30; RR 1·3, 95% CI 1·1–1·6) but not being overweight (BMI 25–30; 1·1, 1·0–1·2) was associated with late-life dementia.”

What the sources say

• Supported

  The Abstract Results report that midlife obesity, but not overweight, was associated with dementia in late life. The relative risks and confidence intervals in the citing sentence match the paper’s figures when rounded. (LLM, conf=0.94)

  cites [109] source

In the paper

“It found the score to be linearly associated with reduced dementia risk; those who scored highest on the five-point scale were 46% less likely to develop incident dementia compared with those in the lowest category.”

What the sources say

• Supported

  The Results report a significant dose–response association: respondents scoring 5 were 46% less likely to develop incident dementia than those scoring 0 or 1, after adjustment for covariates. The Discussion describes the association as negative and linear. The paper calls this a social relationship diversity score, rather than a social contact score. (LLM, conf=0.95)

  cites [124] source

In the paper

“A new meta-analysis found that in long-term studies (≥10 years), good social engagement was modestly protective (n=8876, RR=0·9, 95% CI 0·8–1·0); but loneliness was not associated with dementia risk.”

What the sources say

• Partly supported

  The Subgroup analyses report a modest protective association for good social engagement in studies with ≥10 years of follow-up (RR 0.88, 95% CI 0.80–0.96), consistent with the citing sentence’s rounded figures. The Quantitative synthesis reports a nonsignificant trend toward increased risk with loneliness, while the Summary and significance of findings says the evidence is inconclusive—not that loneliness has no association. The cited n=8876 is not reported for that subgroup in the passages found. (LLM, conf=0.86)

  cites [122] sourceExperimental — accuracy not yet measured

In the paper

“High nitrogen dioxide (NO2) concentration (>41·5 μg/m3; adjusted HR 1·2, 95% CI 1·0–1·3), fine ambient particulate matter (PM)2·5 from traffic exhaust (1·1, 1·0–1·2)127, 128, 129 and PM2·5 from residential wood burning (HR=1·6, 95% CI 1·0–2·4 for a 1 μg/m3 increase) are associated with increased dementia incidence.”

What the sources say

• Supported

  The Results report that a 1 μg/m³ increase in PM2.5 from residential wood burning was associated with dementia incidence (HR 1.55, 95% CI 1.00–2.41). This matches the citing sentence’s rounded wood-burning estimate, the portion attributed to this source; the NO2 and traffic estimates appear with other citations. (LLM, conf=0.93)

  cites [127] source
• Partly supported

  The Results report an association between higher traffic-related pollution exposure and dementia incidence, but the Methods identify the measured exposure as NOx, a marker of vehicle exhaust—not traffic-exhaust PM2.5. The paper does not provide the cited NO2 threshold and hazard ratio; the Discussion says exposure to wood smoke was not controlled for. The residential wood-burning clause appears after the citation in the citing sentence. (LLM, conf=0.87)

  cites [128] sourceExperimental — accuracy not yet measured
• Partly supported

  The Results report increased dementia incidence with NO2 above 41.5 µg/m³ and with traffic-related PM2.5. But the NO2 estimate is HR 1.40 (95% CI 1.12–1.74), not the quoted 1.2; the Methods define traffic PM2.5 as including tyre, brake and other road sources, not exhaust alone. The paper does not assess PM2.5 from residential wood burning. (LLM, conf=0.88)

  cites [129] sourceExperimental — accuracy not yet measured

In the paper

“One study indicated that in women aged 55–64 years, second-hand smoke exposure was associated with more memory deterioration and the risk increased with exposure duration even after controlling for other confounding factors.”

What the sources say

• Supported

  The Results (Table 3) report that among women aged 55–64, each additional year of secondhand-smoke exposure was associated with a further decline in memory score. The Discussion (p. 913) says the association remained after controlling for education, residence, household expenditures, chronic diseases, and baseline memory score. (LLM, conf=0.94)

  cites [115] source

In the paper

“A 14-year longitudinal study of 4922 initially cognitively healthy men, aged 71–89 years, found depression was associated with 1·5 (95% CI 1·2- 2·0) times the incidence of dementia but this association was accounted for by people developing dementia within 5 years of depression.”

What the sources say

• ?Could not verify

  The Results section summarizes studies of social relationships and cognitive functioning, but does not report the described study of 4,922 men or its dementia-incidence estimate. A Background passage mentions depressive symptoms in relation to social support and cognitive abilities, not dementia developing within five years of depression. Searches for the study size, 14-year follow-up, depression, and the five-year finding did not locate the claim in our copy. (LLM, conf=0.76)

  cites [118] sourceExperimental — accuracy not yet measured

In the paper

“Hypnotic use might increase risks although this is unclear and a 2018 study139 suggests that findings of a connection were related to reverse causality and confounders.”

What the sources say

• ?Not checked — no full text of the sourcecites [139] source
• Supported

  The Abstract (page not provided) says earlier studies suggested increased dementia risk with long-term benzodiazepine use, while other studies found no association. The Discussion (page not provided) reports no evidence of an association for benzodiazepines or Z-drugs in this study, supporting the claim’s uncertainty rather than an established increase in risk. (LLM, conf=0.88)

  cites [143] source

In the paper

“A larger effect was observed in the younger age group (65–70 years) and those with the lowest level of education, who had a higher baseline risk”

What the sources say

• ?Could not verify

  The Methods and Statistical analyses sections describe a planned trial and its intended analyses, not observed effects. The Discussion says the study’s varied population will allow later analyses of intervention effects, but reports no larger effect among participants aged 65–70 or those with the lowest education level. Searches for those age, education, and baseline-risk subgroup findings found no supporting passage in our copy. (LLM, conf=0.78)

  cites [157] sourceExperimental — accuracy not yet measured
• Supported

  The Discussion (p. 10) says prespecified subgroup analyses suggested the largest effect in participants aged 65–70 and those with the lowest education. It also says these groups had higher baseline risk, leaving more room for improvement. (LLM, conf=0.93)

  cites [158] source

In the paper

“Reduction of these risk factors might be protective for people with or without a genetic risk, although study findings have not been entirely consistent.175, 176, 177, 178”

What the sources say

• ?Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  cites [175]
• ?Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  cites [176]
• ?Could not verify

  The Statistical Analyses section (page not available) mentions vascular diseases and ApoE ε4 genotype, but only as covariates in analyses of amyloid-related progression. Searches for risk-factor reduction, protection across genetic-risk groups, and inconsistent prevention findings found no passage addressing those points. (LLM, conf=0.76)

  cites [177] sourceExperimental — accuracy not yet measured

In the paper

“The authors comment that the control group's cognitive decline was much lower than expected, leading to an inadequately powered trial.”

What the sources say

• Supported

  The Discussion says the control group had only a quarter of the projected 24-month decline on the NTB primary endpoint. It also says that lower-than-expected cognitive decline rendered the primary endpoint inadequately powered. (LLM, conf=0.94)

  cites [152] source

In the paper

“A 2019 systematic review synthesised observational studies, finding consistently increased risk of dementia from air pollution, but heterogeneous comparator groups precluded meta-analysis.24”

What the sources say

• Partly supported

  The Results section reports an association between greater air-pollution exposure and increased dementia risk. It says variation in statistical methods and frequent use of pollutant-exposure quantiles prevented meta-analysis; it does not identify heterogeneous comparator groups as the reason. Page numbers are not available in our copy. (LLM, conf=0.88)

  cites [24] sourceExperimental — accuracy not yet measured

In the paper

“However, the results in one study which reported the effect of air pollution on incident dementia showed very little difference in estimates before and after adjustment for education and other risk factors, suggesting little residual confounding exists.174”

What the sources say

• ?Could not verify

  The Methods (Candidate exposures) and Results discuss education and several dementia risk factors, but do not report an air-pollution analysis. Searches for air pollution and particulate or traffic exposure found no comparison of estimates before and after adjustment for education or other risk factors. (LLM, conf=0.75)

  cites [174] sourceExperimental — accuracy not yet measured

In the paper

“New onset late-life sleep disturbance, a few years before clinical dementia, might be part of the natural history of the dementia syndrome, appearing to be a risk factor, or reflect other disorders, for example, mood disturbances or cardiovascular disease.”

What the sources say

• ?Not checked — no full text of the sourcecites [135] source
• Partly supported

  The Discussion says increased sleep duration was associated with incident dementia and might be an early sign of dementia, supporting the risk-factor and natural-history possibilities. It does not establish the claim for new-onset sleep disturbance generally or specify that it appears a few years before diagnosis. Nor does it say the sleep change may reflect mood disturbance or cardiovascular disease; the Results mention psychological distress and cardiovascular histories as adjustment variables, not explanations. (LLM, conf=0.87)

  cites [142] sourceExperimental — accuracy not yet measured

In the paper

“Risk also increases per 1 year of age (HR 1·05, 95% CI 0·55–2·0/year), and APOEε4 status (2·6, 1·4–5·0).184”

What the sources say

• ?Could not verify

  The Methods (Participants; page unavailable) report participants’ ages and APOE genotypes, but not their effects on Alzheimer’s disease risk. Searches for the stated hazard ratios, confidence intervals, and age- or APOE-related risk estimates found no such results in our copy. (LLM, conf=0.76)

  cites [184] sourceExperimental — accuracy not yet measured

In the paper

“As we noted in the 2017 Commission, others have previously calculated an estimate of the risk associated with APOε4 at 7% taking into account some other risk factors and this estimate highlights how relatively important potentially modifiable risk factors are in dementia.2, 179”

What the sources say

• Partly supported

  The Abstract says that around one third of dementia may theoretically be preventable and identifies potentially modifiable risk factors, supporting their importance. The passages retrieved for APOE and 7% do not substantiate the specific estimate or its adjustment for other risk factors. (LLM, conf=0.78)

  cites [2] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [179] source

In the paper

“Over 80% of the 266 people who were PET amyloid-positive did not go onto develop a cognitive impairment within 8 years, showing positive status does not predict impairment for most people in a timeframe that might be a useful prognostic window.”

What the sources say

• ?Could not verify

  The Methods (Participants; page unavailable) describe 41 participants, including 18 classified as amyloid-positive, not a cohort of 266 PET-positive people. The Discussion (page unavailable) says longitudinal follow-up would be needed; the copy does not report eight-year cognitive-impairment outcomes or the claimed 80% figure (searched: 266, eight years, longitudinal cognitive impairment). (LLM, conf=0.78)

  cites [184] sourceExperimental — accuracy not yet measured

In the paper

“risperidone in low doses (0·5 mg daily) and some other antipsychotics are sometimes effective but often ineffective and have adverse effects.2”

What the sources say

• ?Could not verify

  The supplied passages contain repository and publication metadata, not the paper’s discussion of treatment. Searches for risperidone, the 0.5 mg dose, antipsychotic effectiveness, and adverse effects found no relevant passage in our copy, so the claim cannot be checked against it. (LLM, conf=0.72)

  cites [2] sourceExperimental — accuracy not yet measured

In the paper

“a 65-year-old woman with only amyloid biomarkers but who is cognitively normal and has no neurodegeneration has a 10-year Alzheimer's disease risk of 2·5% and a man 2·3%, but the risk is higher with accompanying neurodegeneration (table 2 ).185”

What the sources say

• ?Could not verify

  The Discussion reports a general association between a low plasma Aβ42/Aβ40 ratio and future Alzheimer’s disease risk, but gives no 10-year risk estimates by age or sex. Searches for the 2.5% and 2.3% figures and for risk with accompanying neurodegeneration found no passage addressing those claims. (LLM, conf=0.76)

  cites [185] sourceExperimental — accuracy not yet measured

In the paper

“Although CSF Aβ1–42/1–40 ratio and amyloid PET are now considered interchangeable,191 CSF tau biomarkers have only correlated weakly with brain tau as currently measured by radioligands.192”

What the sources say

• ?Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  cites [191]
• ?Could not verify

  Citation 192 is attached to the claim about CSF tau biomarkers and radioligand-measured brain tau. The Methods and Discussion of the IU CHOICE trial address primary-care cognitive screening, not that biomarker correlation; searches for CSF tau, tau PET, and radioligands found no relevant passage in our copy. No page numbers were provided for the indexed passages. (LLM, conf=0.77)

  cites [192] sourceExperimental — accuracy not yet measured

In the paper

“These symptoms might precede dementia and are associated with tau and amyloid neuropathology.210”

What the sources say

• ?Could not verify

  The Introduction (page unavailable) says neuropsychiatric symptoms are common in people with Alzheimer’s disease, but does not say they precede dementia. Searches for symptoms preceding dementia and for tau and amyloid neuropathology found no passage addressing either claim. (LLM, conf=0.73)

  cites [210] sourceExperimental — accuracy not yet measured

In the paper

“The intervention, compared with care as usual, was associated with better outcomes for neuropsychiatric symptoms (Neuropsychiatric Inventory [NPI] score −7·5, 95% CI −11·1 to −3·8), however this effect could be because of deterioration in care as usual (in the care as usual group NPI increased from 7·2 to 15·2; in the intervention group NPI increased from 7·6 to 8·2).”

What the sources say

• ?Could not verify

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

  cites [212] sourceExperimental — accuracy not yet measured

In the paper

“Whether non-prescribing of this drug will help patients by removing an intervention with known benefit or be detrimental to them is unknown.201”

What the sources say

• ?Could not verify

  The Methods (Patients; page unavailable) say participants could continue a stable dose of an acetylcholinesterase inhibitor, but do not examine non-prescribing or withdrawal. The Discussion concerns verubecestat, not whether withholding cholinesterase inhibitors helps or harms patients. Searches for non-prescribing, discontinuation, and withdrawal found no passage addressing that question. (LLM, conf=0.76)

  cites [201] sourceExperimental — accuracy not yet measured

In the paper

“Cholinesterase inhibitors have a useful, modest role in improving cognition and activities of daily living in patients with mild-to-moderate Alzheimer's disease and memantine can be prescribed in combination or each drug used separately for moderate and severe Alzheimer's disease.2, 199, 200”

What the sources say

• ?Could not verify

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

  cites [2] sourceExperimental — accuracy not yet measured
• Partly supported

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

  cites [199] sourceExperimental — accuracy not yet measured
• ?Could not verify

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

  cites [200] sourceExperimental — accuracy not yet measured

In the paper

“Using amyloid PET in patients with cognitive impairment of uncertain causes, results in changes to the clinical diagnosis of Alzheimer's disease187 and sometimes to medication prescription.”

What the sources say

• Partly supported

  The Introduction (page not available) says amyloid-PET can inform whether mild cognitive impairment may be due to Alzheimer’s disease. It does not report that using amyloid-PET changed patients’ clinical diagnoses; nor does it report changes in medication prescriptions. (LLM, conf=0.78)

  cites [187] sourceExperimental — accuracy not yet measured

In the paper

“A Cochrane review207 found 33 trials of cognitive training, only one of which overlapped with the study above, with around 2000 participants with mild-to-moderate dementia, most with a high or uncertain risk of bias.207”

What the sources say

• ?Could not verify

  The Introduction (page unavailable) describes a Cochrane review of 13 care-management trials, not a review of cognitive training. Searches for 33 cognitive-training trials, approximately 2000 participants, and risk of bias found no passage in our copy addressing those claims. (LLM, conf=0.76)

  cites [207] sourceExperimental — accuracy not yet measured

In the paper

“A composite blood biomarker for amyloid tested in a discovery dataset and then a validation cohort of participants aged 60–90 years who were already taking part in studies in Japan or Australia had areas under the receiver operating characteristic curves of 96·7% for discovery and 94·1% for validation. The blood biomarker had sensitivity and specificity above 80% against amyloid PET measurement188”

What the sources say

• ?Could not verify

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

  cites [188] sourceExperimental — accuracy not yet measured

In the paper

“Neuropsychiatric symptoms are common and often clustered in people with dementia.”

What the sources say

• Partly supported

  The Introduction (page not provided) says neuropsychiatric symptoms affect almost all patients with Alzheimer’s disease, supporting the claim that they are common in that form of dementia. It does not say that the symptoms often cluster, and its statement is specific to Alzheimer’s disease rather than dementia generally. (LLM, conf=0.85)

  cites [210] sourceExperimental — accuracy not yet measured

In the paper

“No advances have been reported in Aβ therapeutics, with negative results from phase 3 trials of monoclonal antibodies (eg, solanezumab, crenezumab) and inhibitors of β-secretase, a protease involved in the production of Aβ peptides.202”

What the sources say

• Partly supported

  In “Why it is important to do this review” (page not available), the paper says disease-modifying Alzheimer’s treatment trials have generally failed to improve clinically meaningful outcomes. It does not identify phase 3 results for solanezumab, crenezumab, or β-secretase inhibitors, or explain β-secretase’s role in Aβ production. (LLM, conf=0.86)

  cites [202] sourceExperimental — accuracy not yet measured

In the paper

“The study reported a large reduction in overall neuropsychiatric symptoms immediately after the intervention, which were better in the group receiving home-based tailored activity programme on the neuropsychiatric inventory (mean difference in score 24·3, 95% CI 3·1–45·6), and on functional dependence and pain but this was not sustained 4 months later.”

What the sources say

• ?Could not verify

  The Materials and methods (Measures and Setting and sampling; page unavailable) describe a care-home survey that used the Neuropsychiatric Inventory, not a home-based tailored activity trial. Searches for the eight-session programme, the reported mean difference, functional dependence, pain, and four-month follow-up found no passage reporting the claimed intervention results. (LLM, conf=0.77)

  cites [213] sourceExperimental — accuracy not yet measured

In the paper

“People completing cognitive training, compared with usual treatment or non-specific activities, had small-to-moderate effects on overall cognition (SMD 0·4, 95% CI 0·2–0·6) and specific cognitive abilities such as verbal fluency and improvements lasted for a few months to 1 year.”

What the sources say

• ?Could not verify

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

  cites [207] sourceExperimental — accuracy not yet measured

In the paper

“Specific initiatives have led to a decrease in antipsychotic prescriptions for people with dementia, although often replaced with other psychotropics (figure 8 ), such as benzodiazepines, antidepressants, and mood stabilisers.211”

What the sources say

• ?Could not verify

  The Discussion (Main findings; page unavailable) reports an association between agitation and antipsychotic or hypnotic prescriptions, not a change in prescribing over time. Searches for initiatives, decreased antipsychotic prescribing, and replacement with benzodiazepines, antidepressants or mood stabilisers found no passage addressing those claims. (LLM, conf=0.77)

  cites [211] sourceExperimental — accuracy not yet measured

In the paper

“were able to follow up 140 (54·9%).”

What the sources say

• ?Could not verify

  The Included studies section describes antidepressant trials in dementia, but does not identify the US Reducing Disability in Dementia study. Searches for the study name and for 140, 255, and 54.9% found no passage reporting the claimed follow-up figure. Page numbers were not available in our copy. (LLM, conf=0.76)

  cites [209] sourceExperimental — accuracy not yet measured

In the paper

“The intervention did not reduce agitation symptoms, although it was cost-effective, improving quality of life.223”

What the sources say

• ?Not checked — no full text of the sourcecites [222] source
• Partly supported

  The Results (Group activities vs control condition; page unavailable) report better engagement and mood during group activities, and the Conclusions describe potential benefits for quality of life. But the Methods describe 20 activity sessions, not a six-session staff intervention, and the paper does not report an agitation outcome or cost-effectiveness finding. (LLM, conf=0.84)

  cites [223] sourceExperimental — accuracy not yet measured

In the paper

“Care home residents with agitation often find sitting still difficult and therefore might not be included in activities.217, 218”

What the sources say

• ?Could not verify

  The DICE Approach (Steps 1–3; page unavailable) discusses agitation and recommends meaningful activities, but does not say that agitated care-home residents have difficulty sitting still or are excluded from activities as a result. Searches for sitting still, restlessness, and activity participation found no passage making that connection. (LLM, conf=0.73)

  cites [217] sourceExperimental — accuracy not yet measured
• Partly supported

  The Introduction (p. 2) lists restlessness and pacing as forms of agitation, and Evidence before this study (p. 3) says people with agitation do not necessarily attend care-home activities. The paper does not say that difficulty sitting still is why they might be left out of activities, so the causal link is not supported. (LLM, conf=0.82)

  cites [218] sourceExperimental — accuracy not yet measured

In the paper

“There is no evidence that medication for sleep in dementia is effective230 and considerable evidence for harm—ie, earlier death, increased hospitalisation, and falls—exists.139, 144”

What the sources say

• ?Could not verify

  Citation 230 is attached to the assertion that sleep medication is not effective in dementia; the separate harm claims cite other sources. The retrieved Introduction and trial-methods passages discuss cognitive rehabilitation and dementia-specific medication, not the effectiveness of medication for sleep. Searches for sleep medication, hypnotics, insomnia, and sedatives found no passage addressing that assertion in our copy. (LLM, conf=0.72)

  cites [230] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [139] source
• ?Not checked — no full text of the sourcecites [144] source

In the paper

“Like people without dementia, those with dementia engage more in preferred activities, but require additional support to do so.227”

What the sources say

• ?Could not verify

  The Methods describe informants familiar with participants’ daily activities, and the Conclusions discuss supporting caregivers in managing behavioral symptoms. Neither section addresses whether people with dementia engage more in preferred activities or need additional support to do so compared with people without dementia. Searches for preferred activities and activity participation found no passage addressing that claim. (LLM, conf=0.76)

  cites [227] sourceExperimental — accuracy not yet measured

In the paper

“A Cochrane review of the few people who had been in drug RCTs of methylphenidate versus placebo for apathy in dementia found small improvements on the apathy evaluation scale (MD −5·0, 95% CI −9·6 to−0·4, n=145, three studies, low-quality evidence) but not on the NPI apathy subscale (MD −0·1, 95% CI −3·9 to 3·7, n=85, two studies).229”

What the sources say

• ?Could not verify

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

  cites [229] sourceExperimental — accuracy not yet measured

In the paper

“People who are physically more frail are more likely to have dementia, but the relationship between pathology and symptoms in these people is comparatively weak suggesting that dementia might be from other causes.22”

What the sources say

• Supported

  The Results report that participants with higher frailty scores were more likely to have a dementia diagnosis. The Discussion says increasing frailty weakens the relationship between Alzheimer’s pathology and dementia, and suggests that other mechanisms associated with frailty may contribute to dementia. The Methods describe a frailty index based on health deficits, with cognitive variables excluded. (LLM, conf=0.91)

  cites [22] source

In the paper

“These effect sizes are similar to those seen for medications, but without harmful side-effects.2, 221”

What the sources say

• ?Could not verify

  The available copy contains a repository listing and bibliographic metadata, not the paper's discussion of treatment effects. Searches for medication comparisons, effect sizes, and side effects found no relevant passage, so the claim cannot be checked against this copy. (LLM, conf=0.75)

  cites [2] sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [221] source

In the paper

“People with dementia might forget to tell their family or health professionals of symptoms, struggle to understand or follow agreed plans, and are more likely to forget to drink and eat, increasing falling and infection rates.237”

What the sources say

• Partly supported

  The Introduction (page not available) says dementia can complicate the management of comorbid conditions, which broadly supports the claim about difficulty following care plans. It does not describe forgetting to report symptoms or to eat and drink, or link those difficulties to falls and infections. Searches for those specific mechanisms found no supporting passage. (LLM, conf=0.78)

  cites [237] sourceExperimental — accuracy not yet measured

In the paper

“Severity and mortality of the associated disease (COVID-19) worsen with increasing age251 and with pre-existing illnesses such as hypertension and diabetes,252 and thus many people with dementia are at particular risk.”

What the sources say

• Partly supported

  In “Implement Physical, Not Social Distancing” (page unavailable), the paper says older adults and people with physical illnesses, including diabetes, are at particularly high risk of dying from COVID-19. It does not specifically identify hypertension or establish that people with dementia are at particular risk, and it does not describe a graded increase in severity with age. (LLM, conf=0.86)

  cites [251] sourceExperimental — accuracy not yet measured
• Partly supported

  In the main text (page unavailable), the paper says most people who died from COVID-19 were older adults, many with underlying health problems, and describes particular concerns for people with dementia. It does not establish that COVID-19 severity increases progressively with age. Hypertension and diabetes appear beside a separate citation in the citing sentence and are not assessed as claims attributed to this paper. (LLM, conf=0.85)

  cites [252] sourceExperimental — accuracy not yet measured

In the paper

“Compared to the general older population, people with dementia have increased rates of cerebrovascular disease,243, 244, 245, 246 stroke,247 Parkinson's disease,243, 245 diabetes,245, 247 skin ulcers, anxiety and depression,243, 245 pneumonia, incontinence, and electrolyte disturbance.245”

What the sources say

• Partly supported

  The Results and Table 1 (page not provided) show that participants with dementia had more chronic diseases overall than non-demented participants. Table 2 lists cerebrovascular disease, Parkinson disease, diabetes, and depression, but groups them by number of diseases—not dementia status—so it does not establish higher rates of those specific conditions in people with dementia. The copy does not report electrolyte disturbance. (LLM, conf=0.86)

  cites [243] sourceExperimental — accuracy not yet measured
• ?Could not verify

  The Results > Patients section describes three adults hospitalized with pneumonia in Wuhan; it does not compare people with dementia against the general older population. Searches for dementia, stroke, diabetes, and comparative comorbidity rates found no passage addressing the claim. The shared mention of pneumonia does not establish an increased rate in people with dementia. (LLM, conf=0.76)

  cites [245] sourceExperimental — accuracy not yet measured
• ?Could not verify

  The Results section on comorbidities reports cerebrovascular disease and diabetes among patients with COVID-19, not among people with dementia. Searches for dementia, Parkinson’s disease, incontinence, and electrolyte disturbance found no comparison with the general older population in our copy. (LLM, conf=0.77)

  cites [247] sourceExperimental — accuracy not yet measured

In the paper

“These were: in-home physiotherapist delivered aerobic exercise (two studies, larger one positive, 140 people with Alzheimer's disease; smaller study negative, 30 people with Alzheimer's disease), individualised cognitive rehabilitation (mild or moderate dementia; two studies; 257 cognitive reserve intervention groups and 255 controls), and in-home activities-focused occupational therapy (people”

What the sources say

• ?Could not verify

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

  cites [236] sourceExperimental — accuracy not yet measured

In the paper

“Multimorbidity in people with dementia is associated with faster functional decline248 and worse quality of life for people with dementia and their family carers.249”

What the sources say

• ?Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  cites [248]
• ?Could not verify

  Citation 249 is attached to the claim about worse quality of life for people with dementia and their family carers; citation 248 covers faster functional decline. The cited paper’s Encephalopathies and Neurodegenerative disorders sections (page numbers unavailable) discuss COVID-19-related neurological outcomes, but the passages found when searching for dementia, multimorbidity, carers and quality of life do not address that association. (LLM, conf=0.75)

  cites [249] sourceExperimental — accuracy not yet measured

In the paper

“The treatment did not improve participants' quality of life, mood, self-efficacy, cognition, carer stress, or health status and was not cost-effective.”

What the sources say

• ?Could not verify

  The Results section’s overview lists quality of life, mood, cognition and carer stress as outcomes considered across studies, but does not report that one treatment failed to improve them or was not cost-effective. A separate Results passage reports increased self-efficacy after personalised education sessions. Searches for the combined outcomes and cost-effectiveness found no passage establishing the claimed treatment result. (LLM, conf=0.73)

  cites [235] sourceExperimental — accuracy not yet measured