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Home › Research › What the research found › Every row

Every row of the evidence table

One row per finding: what was tested, which way the result went, and how the study was built. The answer by area, and where the studies disagree, are on the main page.

Every row

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Area All 382 Care, carers and services 140 Medicines 85 Genes (not modifiable) 35 All modifiable factors together 27 Diet and supplements 23 Exercise and activity 21 Sleep, mood and social life 19 Hearing and vision 8 Alcohol, tobacco and cannabis 6 Infection and vaccination 5 Heart and metabolic health 4 Injury, delirium and falls 4 Environment 3 Cognitive activity 2
Question Both Prevention 190 Treatment 192
Direction Any Benefit 144 Harm 105 No effect 38 Mixed 37 No direction reported 58
Design Any meta-analysis 57 randomised trial 44 phase 3 trial 15 systematic review 9 phase 2 trial 10 cohort study 136 phase 1 trial 2 cross-sectional study 31 case-control study 14 modelling study 20 regulatory decision 7 company announcement 1 coverage determination 1 None 35
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Showing 2 of 382 rows. One row per study per exposure: a study that tested two different things appears twice, once for each.

Scroll the table sideways to see every column.

Research and outcomes, 2 rows. Every row links to its source.
Exposure Question Direction Outcome measured Design People Effect size, as the source reported it Source
Blood biomarker test (p-tau217 / amyloid ratio) Care, carers and services Treatment Mixed
why

The review's own summary points two ways: CSF biomarker tests were mostly cost-effective against cognitive assessment or imaging, while blood biomarker tests showed mixed results; every included study was model-based.

 Cost-effectiveness of CSF and blood biomarker testing for AD diagnosis across nine model-based economic evaluations systematic review not stated not established — systematic review without meta-analysis; the abstract reports no pooled estimate. European Journal of Health Economics 2026
✓ Peer-reviewed PMID 41385058
Cost-effectiveness of anti-amyloid antibody Care, carers and services Treatment Mixed
why

The review splits by drug class: at $100,000 per QALY every study found memantine cost-effective and more than half found the cholinesterase inhibitors so, whereas aducanumab, lecanemab and donanemab were not cost-effective in any study. A value result, not a clinical harm.

 Cost-effectiveness of FDA-approved AD drugs across 23 published analyses (memantine, cholinesterase inhibitors, anti-amyloid antibodies) systematic review not stated At a willingness-to-pay (WTP) threshold of $100,000/QALY, all studies found memantine cost-effective, and more than half reported cost-effectiveness for donepezil, rivastigmine, and galantamine. Aducanumab, lecanemab, and donanemab were not cost-effective in any study. Under the WTP threshold of $150,000/QALY, value-based prices for aducanumab, lecanemab, and donanemab were estimated below $5,960, $15,700, and $33,700, respectively Journal of Alzheimer's Disease 2026
✓ Peer-reviewed PMID 41837605

How this table was built, and where it is weak →