Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

105 questions · 111 findings · 19 reviews · Airways

No studies found 18 · 16.2%GRADE not reported 3 · 2.7%Very low 14 · 12.6%Low 26 · 23.4%Moderate 38 · 34.2%High 12 · 10.8%

Antibiotics vs placebo

Treatment failure within 4 weeks ‐ current drugs only ‐ inpatient · exacerbations of COPD

Antibiotics showed no clear difference in treatment failure within 4 weeks ‐ current drugs only ‐ inpatient compared with placebo (moderate certainty).

1 finding from 1 review

Antibiotics vs placebo or no treatment

Number of participants who were not cured at · children < 24 months with ongoing symptoms (cough/wheeze) post‐acute bronchiolitis

Antibiotics showed no clear difference in number of participants who were not cured at compared with placebo or no treatment (low certainty).

1 finding from 1 review

Antibiotics vs placebo or no treatment

Number of participants rehospitalised for a respiratory illness · children < 24 months with ongoing symptoms (cough/wheeze) post‐acute bronchiolitis

Antibiotics showed no clear difference in number of participants rehospitalised for a respiratory illness compared with placebo or no treatment (low certainty).

1 finding from 1 review

Antibiotics vs placebo or no treatment

Proportion of participants with recurrent wheeze · children < 24 months with ongoing symptoms (cough/wheeze) post‐acute bronchiolitis

Antibiotics showed no clear difference in proportion of participants with recurrent wheeze compared with placebo or no treatment (low certainty).

1 finding from 1 review

Summary of findings table ‐ immunostimulant vs placebo

Number of participants requiring antibiotics · adults with chronic bronchitis or chronic obstructive pulmonary disease

Summary of findings table ‐ immunostimulant probably leads to lower number of participants requiring antibiotics compared with placebo (moderate certainty).

1 finding from 1 review

Fixed‐dose combination aclidinium/formoterol vs aclidinium alone

Exacerbations requiring steroids or antibiotics or both: number of participants · patients with chronic obstructive pulmonary disease

Fixed‐dose combination aclidinium/formoterol showed no clear difference in exacerbations requiring steroids or antibiotics or both: number of… compared with aclidinium alone (moderate certainty).

1 finding from 1 review

Fixed‐dose combination aclidinium/formoterol vs placebo

Exacerbations requiring steroids or antibiotics or both: number of participants · patients with chronic obstructive pulmonary disease

Fixed‐dose combination aclidinium/formoterol showed no clear difference in exacerbations requiring steroids or antibiotics or both: number of… compared with placebo (moderate certainty).

1 finding from 1 review

Fixed‐dose combination aclidinium/formoterol vs formoterol

Exacerbations requiring steroids or antibiotics or both: number of participants · patients with chronic obstructive pulmonary disease

Fixed‐dose combination aclidinium/formoterol leads to lower exacerbations requiring steroids or antibiotics or both: number of… compared with formoterol (high certainty).

1 finding from 1 review

Once‐daily ICS/LABA combined inhalers vs once‐daily LAMA

Any COPD exacerbation that requires short‐burst oral corticosteroids or antibiotics, or both · patients with chronic obstructive pulmonary disease

It is very uncertain whether once‐daily ICS/LABA combined inhalers changes any COPD exacerbation that requires short‐burst oral corticosteroids… compared with once‐daily LAMA (very low certainty).

1 finding from 1 review

Umeclidinium bromide vs placebo

Exacerbations requiring steroids or antibiotics or both: number of participants · patients with chronic obstructive pulmonary disease

Umeclidinium bromide leads to lower number of participants with exacerbations requiring steroids,… compared with placebo (high certainty).

1 finding from 1 review