Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

807 questions · 849 findings · 68 reviews · Headline outcomes only

No studies found 236 · 27.8%GRADE not reported 50 · 5.9%Very low 266 · 31.3%Low 168 · 19.8%Moderate 104 · 12.2%High 25 · 2.9%

Antihypertensive drug therapy vs placebo

Number of cases of dementia Range of · participants without prior cerebrovascular disease for prevention of cognitive impairment and dementia

It is very uncertain whether antihypertensive therapy changes number of cases of dementia Range of compared with placebo (very low certainty).

1 finding from 1 review