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Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1 questions · 1 findings · 1 reviews · Headline outcomes only

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No studies found 0 · 0%GRADE not reported 0 · 0%Very low 1 · 100%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

Intervention not reported

Mortality (deaths during trial period) · adults (> 18 years of age) with either COPD or recurrent acute exacerbations of chronic bronchitis

It is very uncertain whether the intervention changes mortality (deaths during trial period) (very low certainty).

1 finding from 1 review