Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

3,454 questions · 3,562 findings · 816 reviews · Headline outcomes only

No studies found 538 · 15.1%GRADE not reported 239 · 6.7%Very low 933 · 26.2%Low 1,041 · 29.2%Moderate 612 · 17.2%High 199 · 5.6%

14 days on/off antibiotic regimen vs 14 days on/off placebo regimen

Exacerbation frequency · people with bronchiectasis

14 days on/off antibiotic regimen probably leads to lower exacerbation frequency compared with 14 days on/off placebo regimen (moderate certainty).

2 findings from 1 review

28 days on/off antibiotic regimen vs 28 days on/off placebo regimen

Pulmonary exacerbations: number of hospitalisations due to respiratory exacerbations · people with bronchiectasis

28 days on/off antibiotic regimen showed no clear difference in hospitalisation for pulmonary exacerbations compared with 28 days on/off placebo regimen (high certainty).

1 finding from 1 review

14 days on/off antibiotic regimen vs 28 days on/off antibiotic regimen

Exacerbation frequency · people with bronchiectasis

14 days on/off antibiotic regimen showed no clear difference in exacerbation frequency compared with 28 days on/off antibiotic regimen (moderate certainty).

2 findings from 1 review