Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

14 questions · 14 findings · 6 reviews · Headline outcomes only

No studies found 6 · 42.9%GRADE not reported 0 · 0%Very low 3 · 21.4%Low 4 · 28.6%Moderate 0 · 0%High 1 · 7.1%

Continuous positive airway pressure (CPAP) vs phosphodiesterase type 5 inhibitors

Minor adverse events · erectile dysfunction in men with obstructive sleep apnoea

It is very uncertain whether continuous positive airway pressure (CPAP) changes minor adverse events compared with phosphodiesterase type 5 inhibitors (very low certainty).

1 finding from 1 review

Intervention not reported

Minor adverse events · for effects on cramps, people (other than pregnant women) with muscle cramps (largely older adults); for adverse events, all populations

The intervention showed no clear difference in minor adverse events (low certainty).

1 finding from 1 review

Vitamin A vs placebo

Adverse events: minor gastrointestinal symptoms · healthy people and healthy male physicians

Vitamin A leads to higher adverse events: minor gastrointestinal symptoms compared with placebo (high certainty).

1 finding from 1 review