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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 1 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, 1 row. Every row links to its source.
Exposure Question Direction Outcome measured Design People Effect size, as the source reported it Source
Cannabinoid (THC/CBD) for agitation in severe dementia Medicines Treatment No effect
why

No difference from placebo on the primary agitation outcome or other main behavioural outcomes. As-needed psychotropic use was lower during the active period, and no serious drug-related adverse events occurred.

 Agitation on the Cohen-Mansfield Agitation Inventory (primary); as-needed psychotropic use; safety randomised trial 25 not established — pubmed abstract results: "no significant difference was observed between active treatment and placebo for the cmai and other main behavioural… Age and ageing 2026
✓ Peer-reviewed PMID 42613673

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