Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

119 questions · 125 findings · 20 reviews · Airways · Headline outcomes only

No studies found 22 · 17.6%GRADE not reported 6 · 4.8%Very low 18 · 14.4%Low 29 · 23.2%Moderate 38 · 30.4%High 12 · 9.6%

Antibiotics vs placebo

Adverse effects of antibiotics · prolonged wet cough in children

Antibiotics showed no clear difference in children experiencing adverse effects of antibiotics (e.g.… compared with placebo (low certainty).

1 finding from 1 review

Antibiotics vs placebo

Exacerbations · Adults (aged 40 or over) with COPD presenting with 1 or more exacerbations in the previous year. The 2 larger studies (Albert 2011; Sethi…

Antibiotics probably leads to lower number of people with one or more exacerbations WMD of compared with placebo (moderate certainty).

1 finding from 1 review

Antibiotics vs placebo

Annual Exacerbation Rates · Adults (aged 40 or over) with COPD presenting with 1 or more exacerbations in the previous year. The 2 larger studies (Albert 2011; Sethi…

Antibiotics probably leads to lower rate of exacerbation per patient/year WMD of compared with placebo (moderate certainty).

1 finding from 1 review

Antibiotics vs placebo

All‐cause mortality WMD of · Adults (aged 40 or over) with COPD presenting with 1 or more exacerbations in the previous year. The 2 larger studies (Albert 2011; Sethi…

Antibiotics showed no clear difference in all‐cause mortality WMD of compared with placebo (moderate certainty).

1 finding from 1 review

Antibiotics vs placebo

Serious adverse events WMD of · Adults (aged 40 or over) with COPD presenting with 1 or more exacerbations in the previous year. The 2 larger studies (Albert 2011; Sethi…

Antibiotics showed no clear difference in serious adverse events WMD of compared with placebo (moderate certainty).

1 finding from 1 review

Antibiotics vs placebo or usual care

Serious adverse events Duration 3 days to 3 weeks · acute asthma exacerbation

Antibiotics showed no clear difference in serious adverse events Duration 3 days to 3 weeks compared with placebo or usual care (low certainty).

1 finding from 1 review

Antibiotics vs placebo

Children not cured or substantially improved at · prolonged wet cough in children

Antibiotics probably leads to lower children not cured or substantially improved at compared with placebo (moderate certainty).

1 finding from 1 review