Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

217 questions · 238 findings · 27 reviews · Airways

No studies found 30 · 12.6%GRADE not reported 14 · 5.9%Very low 51 · 21.4%Low 82 · 34.5%Moderate 57 · 23.9%High 4 · 1.7%

Intervention vs usual care

Exacerbations (number of people experiencing ≥ 1 exacerbations) · COPD and at least one other long‐term condition

It is very uncertain whether intervention changes exacerbations ‐ number of people experiencing one or more  compared with usual care (very low certainty).

1 finding from 1 review