Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

65 questions · 65 findings · 32 reviews · Airways

No studies found 4 · 6.2%GRADE not reported 1 · 1.5%Very low 8 · 12.3%Low 18 · 27.7%Moderate 26 · 40%High 8 · 12.3%

Tiotropium vs placebo

Exacerbations (number of people experiencing ≥ 1 exacerbations) · people with COPD who have smoked for ≥ 10 pack‐years

Tiotropium leads to lower number of patients with one or more exacerbations compared with placebo (high certainty).

1 finding from 1 review

Tiotropium vs placebo

Hospital admissions due to exacerbations: number of participants · people with COPD who have smoked for ≥ 10 pack‐years

Tiotropium showed no clear difference in number of patients with one or more exacerbations requiring… compared with placebo (moderate certainty).

1 finding from 1 review

Intervention not reported

SGRQ Scores range from 0 to 100, with higher scores indicating more limitations · 18 to 80 years of age with bronchiectasis

The intervention showed no clear difference in SGRQ Scores range from 0 to 100, with higher scores indicating more… (low certainty).

1 finding from 1 review

Anti‐leukotrienes & ICS vs same‐dose ICS

Number of participants experiencing one or more episode requiring treatment with oral steroids · children with asthma

Anti‐leukotrienes & ICS may leads to lower participants with one or more exacerbations requiring oral… compared with same dose ICS (low certainty).

1 finding from 1 review

Anti‐leukotrienes & ICS vs ICS dose increase

Number of participants experiencing one or more episode requiring treatment with oral steroids · children with asthma

Anti‐leukotrienes & ICS may leads to lower participants with one or more exacerbations requiring oral… compared with higher dose ICS (low certainty).

1 finding from 1 review

Intermittent 'as needed' ICS vs daily ICS

Number of participants experiencing one or more episode requiring treatment with oral steroids · Children and adults with persistent asthma.

Intermittent 'as needed' ICS showed no clear difference in patients with 1 or more exacerbations requiring oral corticosteroids… compared with daily ICS (low certainty).

1 finding from 1 review

Long‐acting beta2‐agonists vs placebo

Participants with one or more serious adverse event (non‐fatal) · patients with chronic obstructive pulmonary disease

Long‐acting beta2‐agonists showed no clear difference in participants with one or more serious adverse event (non‐fatal) compared with placebo (moderate certainty).

1 finding from 1 review

Asthma Clinics (Intervention) vs controls

Number of participants experiencing one or more episodes requiring ED visit · people with asthma

It is very uncertain whether asthma Clinics (Intervention) changes A&E visits Number of people experiencing one or more A&E visit compared with controls (very low certainty).

1 finding from 1 review

Asthma Clinics (Intervention) vs controls

Hospital admissions · people with asthma

Asthma Clinics (Intervention) showed no clear difference in hospital admissions Number of people experiencing one or more… compared with controls (low certainty).

1 finding from 1 review

Intervention not reported

Readmission to hospital, inpatient. Number of people experiencing one or more readmissions ( · exacerbations of COPD

The intervention probably leads to lower readmission to hospital, inpatient. Number of people experiencing… (moderate certainty).

1 finding from 1 review

Tiotropium vs long‐acting beta‐agonists

Hospitalisations, number of participants with 1 or more exacerbations · patients with stable chronic obstructive pulmonary disease and > 10 pack years smoking history

Tiotropium probably leads to lower patients with 1 or more exacerbations compared with long‐acting beta‐agonists (moderate certainty).

1 finding from 1 review

Intervention not reported

Number of subjects who had one or more exacerbations over the study period in adults ( · Adults and children with asthma

The intervention showed no clear difference in number of subjects who had one or more exacerbations over the study… (moderate certainty).

1 finding from 1 review

Intervention not reported

Number of subjects who had one or more exacerbations over the study period in children and adolescents ( · Adults and children with asthma

The intervention showed no clear difference in number of subjects who had one or more exacerbations over the study… (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