Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,520 questions · 1,575 findings · 175 reviews · Headline outcomes only

No studies found 239 · 15.2%GRADE not reported 59 · 3.7%Very low 337 · 21.4%Low 406 · 25.8%Moderate 410 · 26%High 124 · 7.9%

Intervention not reported

Number of participants requiring oral corticosteroids over the study period · Adults from minority groups with doctor diagnosed asthma

It is very uncertain whether the intervention changes number of participants requiring oral corticosteroids over the study… (very low certainty).

1 finding from 1 review

Intervention not reported

Antibiotic prescriptions (number of courses/person/year) **Corticosteroids not meta‐analysed · adults (> 18 years of age) with either COPD or recurrent acute exacerbations of chronic bronchitis

The intervention may leads to higher antibiotic prescriptions (number of courses/person/year)… (low certainty).

1 finding from 1 review

Self‐management interventions vs usual care

Courses of oral corticosteroids · patients with chronic obstructive pulmonary disease

Self‐management interventions including action plans for exacerbations showed no clear difference in courses of oral steroids compared with usual care (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

Intervention not reported

Exacerbations requiring oral corticosteroids 7.3‐month · people with asthma

The intervention showed no clear difference in exacerbations requiring oral corticosteroids 7.3‐month (low certainty).

1 finding from 1 review

Intervention not reported

Exacerbations requiring oral corticosteroids3 months · adults or children with asthma

The intervention showed no clear difference in exacerbations requiring oral corticosteroids3 months (low certainty).

1 finding from 1 review

Maintenance LTRA vs placebo

Number of participants experiencing one or more episode requiring treatment with oral steroids · episodic viral wheeze in children

Maintenance LTRA showed no clear difference in number of participants experiencing one or more episode requiring… compared with placebo (moderate certainty).

1 finding from 1 review