Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

25 questions · 25 findings · 11 reviews · Airways

No studies found 0 · 0%GRADE not reported 1 · 4%Very low 0 · 0%Low 8 · 32%Moderate 7 · 28%High 9 · 36%

Long‐acting beta2‐agonists vs placebo

Quality of life St George's Respiratory Questionnaire (SGRQ) score · patients with chronic obstructive pulmonary disease

Long‐acting beta2‐agonists showed no clear difference in quality of life1 St George's Respiratory Questionnaire (SGRQ); lower… compared with placebo (moderate certainty).

1 finding from 1 review