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Evidence found and GRADE certainty

4,751 questions · 12,775 findings · 807 reviews · Headline outcomes only

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No studies found 3,413 · 26.7%GRADE not reported 709 · 5.5%Very low 3,483 · 27.3%Low 3,165 · 24.8%Moderate 1,628 · 12.7%High 377 · 3%

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Endovenous laser ablation (EVLA) vs foam sclerotherapy

Technical success · people with GSV incompetence

Endovenous laser ablation (EVLA) showed no clear difference in technical success (< 5 years) compared with ultrasound‐guided foam sclerotherapy (UGFS) (low certainty).

2 findings from 1 review

Nicotine replacement therapy vs placebo

Change in weight (kg) · People who have quit smoking

Nicotine replacement therapy for smoking cessation showed no clear difference in mean weight change (kg) at end of treatment compared with placebo (moderate certainty).

3 findings from 1 review

Varenicline vs placebo

Change in weight (kg) · People who have quit smoking

Varenicline for smoking cessation showed no clear difference in mean weight change (kg) at end of treatment compared with placebo (high certainty).

3 findings from 1 review

Fluoexetine vs placebo

Change in weight (kg) · People who have quit smoking

Fluoexetine showed no clear difference in mean weight change (kg) at end of treatment compared with placebo (low certainty).

2 findings from 1 review