Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,041 questions · 1,056 findings · 283 reviews

No studies found 346 · 32.8%GRADE not reported 111 · 10.5%Very low 326 · 30.9%Low 195 · 18.5%Moderate 66 · 6.3%High 12 · 1.1%

Homocysteine‐lowering interventions (Folic Acid, Vitamin B6 and Vitamin B12) vs placebo or usual care

Adverse events · people with or without existing cardiovascular disease, men and women

Homocysteine‐lowering interventions (Vitamin B6 (pyridoxine;… showed no clear difference in adverse events compared with placebo or standard care (high certainty).

1 finding from 1 review

Pharmacological interventions vs placebo

Gastrointestinal adverse events · people with depression after stroke

It is very uncertain whether pharmacological interventions changes adverse events: all ‐ gastrointestinal effects (e.g. constipation,… compared with placebo (very low certainty).

1 finding from 1 review

Pharmacological interventions vs placebo

Adverse effects (central nervous system) · people with depression after stroke

It is very uncertain whether pharmacological interventions changes adverse events: all ‐ central nervous system events (e.g. confusion,… compared with placebo (very low certainty).

1 finding from 1 review

Lay health worker‐ vs enhanced usual care

Adverse events ‐ death in past 12 months (RR > 1 denotes higher risk of death) · adult patients with alcohol dependence

It is very uncertain whether lay health worker‐led interventions changes adverse events ‐ death in past 12 months (RR > 1 denotes higher risk… compared with enhanced usual care (very low certainty).

1 finding from 1 review