Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

539 questions · 553 findings · 58 reviews · Airways

No studies found 37 · 6.7%GRADE not reported 8 · 1.4%Very low 27 · 4.9%Low 161 · 29.1%Moderate 219 · 39.6%High 101 · 18.3%

Group 2 Pulmonary hypertension due to left‐heart disease ‐ PDE5i vs placebo

Improvement in WHO functional class · people with pulmonary hypertension due to left‐heart disease

Group 2 Pulmonary hypertension due to left‐heart disease ‐ PDE5i probably leads to lower improvement in WHO functional class compared with placebo (moderate certainty).

1 finding from 1 review