Gap finder

Search review questions

Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.

Limit to evidence status or GRADE (optional)

2,325 questions in 216 reviews · Airways

current versions
No studies 249 · 10.7%Ungraded 107 · 4.6%Very low 276 · 11.9%Low 751 · 32.3%Moderate 718 · 30.9%High 224 · 9.6%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
Macrolides vs no intervention
Mortality · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted2 studies · 88 participantsVery low
Macrolides vs no intervention
QoL SGRQ: endpoint total score Scale from 0 to 100 · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted2 studies · 89 participantsModerate
Macrolides vs no intervention
QoL SGRQ: change in total score Scale from 0 to 100 · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 30 participantsModerate
Macrolides vs placebo
Exacerbation frequency · children with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
IRR 0.51 study · 89 participantsLow
Macrolides vs placebo
Hospitalisation: all‐cause · children with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
OR 0.28 [0.07, 1.11]1 study · 89 participantsLow
Macrolides vs placebo
Serious adverse events · children with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
OR 0.43 [0.17, 1.05]1 study · 89 participantsLow
Macrolides vs placebo
Mortality · children with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 42 participantsLow
Macrolides vs placebo
Quality of life not reported · children with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Macrolides vs no intervention
Exacerbations ‐ not reported · children with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Macrolides vs no intervention
Hospitalisation ‐ not reported · children with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Macrolides vs placebo
Hospitalisation: all cause · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
OR 0.56 [0.19, 1.62]2 studies · 151 participantsLow
Macrolides vs no intervention
Serious adverse events ‐ not reported · children with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Macrolides vs no intervention
Mortality · children with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 34 participantsLow
Macrolides vs no intervention
Quality of life ‐ not reported · children with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Macrolides vs placebo
Serious adverse events · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
OR 0.49 [0.2, 1.23]3 studies · 326 participantsLow
Macrolides vs placebo
All‐cause mortality · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted7 studies · 540 participantsLow
Macrolides vs placebo
Quality of life: endpoint · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 68 participantsModerate
Macrolides vs placebo
Quality of life: change · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted4 studies · 305 participantsLow
Macrolides vs no intervention
≥ 1 exacerbation · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
OR 0.31 [0.08, 1.15]1 study · 43 participantsModerate
Macrolides vs no intervention
Hospitalisations ‐ not reported · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Macrolides vs no intervention
Serious adverse events ‐ not reported · adults with bronchiectasis
Macrolide antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Oral + inhaled dual therapy vs oral monotherapy
Successful treatment of exacerbation: number of participants cured. Outcome assessed on day 42 · bronchiectasis
Dual antibiotics for bronchiectasis (2018) · Cochrane
OR 0.66 [0.22, 2.01]1 study · 53 participantsVery low
Oral + inhaled dual therapy vs oral monotherapy
Successful treatment of exacerbation: number of participants with P aeruginosa eradication. Outcome assessed on day 21 · bronchiectasis
Dual antibiotics for bronchiectasis (2018) · Cochrane
OR 2.33 [0.66, 8.24]1 study · 53 participantsVery low
Oral + inhaled dual therapy vs oral monotherapy
Serious adverse events. Outcome assessed on day 42 · bronchiectasis
Dual antibiotics for bronchiectasis (2018) · Cochrane
OR 0.48 [0.08, 2.87]1 study · 53 participantsVery low
Oral + inhaled dual therapy vs oral monotherapy
Treatment response: relapse (day 42). Outcome assessed on day 42 · bronchiectasis
Dual antibiotics for bronchiectasis (2018) · Cochrane
OR 0.57 [0.12, 2.69]1 study · 53 participantsVery low
Oral + inhaled dual therapy vs oral monotherapy
Microbiological response: eradicated. Outcome assessed on day 21 · bronchiectasis
Dual antibiotics for bronchiectasis (2018) · Cochrane
OR 2.4 [0.67, 8.65]1 study · 49 participantsVery low
Oral + inhaled dual therapy vs oral monotherapy
Hospitalisations · bronchiectasis
Dual antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Oral + inhaled dual therapy vs oral monotherapy
Death · bronchiectasis
Dual antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Oral + inhaled dual therapy vs oral monotherapy
Quality of life · bronchiectasis
Dual antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Self‐management vs usual care
Health‐related quality of life · people with non‐cystic fibrosis bronchiectasis
Self‐management for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 20 participantsVery low
Self‐management vs usual care
Health‐related quality of life · people with non‐cystic fibrosis bronchiectasis
Self‐management for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 60 participantsLow
Self‐management vs usual care
Exacerbations requiring antibiotics · people with non‐cystic fibrosis bronchiectasis
Self‐management for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Self‐management vs usual care
Serious adverse events: mortality · people with non‐cystic fibrosis bronchiectasis
Self‐management for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 20 participantsUngraded
Self‐management vs usual care
Hospital admissions (number admitted at least once) · people with non‐cystic fibrosis bronchiectasis
Self‐management for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 20 participantsUngraded
Self‐management vs usual care
Lung function · people with non‐cystic fibrosis bronchiectasis
Self‐management for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 20 participantsVery low
Self‐management vs usual care
Self‐efficacy · people with non‐cystic fibrosis bronchiectasis
Self‐management for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 60 participantsLow
Self‐management vs usual care
Economic costs · people with non‐cystic fibrosis bronchiectasis
Self‐management for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Fluoroquinolones vs amoxicillin
Exacerbations · adults aged 18 years and above with diagnosis of non‐cystic fibrosis bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Polymyxins vs aminoglycosides
Response rate ‐ improvement in sputum purulence · adults aged 18 years and above with diagnosis of bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
OR 0.16 [0.01, 3.85]1 study · 20 participantsVery low
Polymyxins vs aminoglycosides
Response rate ‐ P aeruginosa eradication · adults aged 18 years and above with diagnosis of bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
OR 1.4 [0.36, 5.35]1 study · 35 participantsVery low
Polymyxins vs aminoglycosides
Deaths · adults aged 18 years and above with diagnosis of bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 20 participantsVery low
Polymyxins vs aminoglycosides
Quality of life · adults aged 18 years and above with diagnosis of bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Fluoroquinolones vs amoxicillin
Serious adverse events · adults aged 18 years and above with diagnosis of non‐cystic fibrosis bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted2 studies · 83 participantsLow
Fluoroquinolones vs amoxicillin
Response rate ‐ treatment failure · adults aged 18 years and above with diagnosis of non‐cystic fibrosis bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
OR 0.07 [0.01, 0.32]2 studies · 83 participantsLow
Fluoroquinolones vs amoxicillin
Response rate ‐ microbiological response · adults aged 18 years and above with diagnosis of non‐cystic fibrosis bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
Peto OR 20.09 [2.83, 142.59]1 study · 16 participantsLow
Fluoroquinolones vs amoxicillin
Response rate ‐ improvement in sputum purulence (excellent) · adults aged 18 years and above with diagnosis of non‐cystic fibrosis bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
OR 2.35 [0.96, 5.72]2 studies · 83 participantsVery low
Fluoroquinolones vs amoxicillin
Deaths · adults aged 18 years and above with diagnosis of non‐cystic fibrosis bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted2 studies · 83 participantsLow
Fluoroquinolones vs amoxicillin
Quality of life · adults aged 18 years and above with diagnosis of non‐cystic fibrosis bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Polymyxins vs aminoglycosides
Exacerbation · adults aged 18 years and above with diagnosis of bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
no estimate extractedNRNo studies
Polymyxins vs aminoglycosides
Serious adverse events · adults aged 18 years and above with diagnosis of bronchiectasis
Head‐to‐head trials of antibiotics for bronchiectasis (2018) · Cochrane
no estimate extracted1 study · 20 participantsVery low