Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

3,801 questions · 4,079 findings · 473 reviews

No studies found 669 · 16.4%GRADE not reported 852 · 20.9%Very low 738 · 18.1%Low 903 · 22.1%Moderate 716 · 17.6%High 201 · 4.9%

Pharmacological treatment vs placebo

Prolonged abstinence at longest · smokers with COPD

Pharmacological treatment leads to higher prolonged abstinence at longest compared with placebo (high certainty).

5 findings from 1 review
Show 2 more findings