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)

2,280 questions in 114 reviews · Cystic Fibrosis and Genetic Disorders

current versions
No studies 856 · 37.5%Ungraded 58 · 2.5%Very low 550 · 24.1%Low 502 · 22%Moderate 271 · 11.9%High 43 · 1.9%

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
Hypertonic saline vs sodium‐2‐mercaptoethane sulphonate (Mistabron®)
LCI · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline vs sodium‐2‐mercaptoethane sulphonate (Mistabron®)
Mortality · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline vs sodium‐2‐mercaptoethane sulphonate (Mistabron®)
Measures of sputum clearance · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 29 participantsVery low
Hypertonic saline vs sodium‐2‐mercaptoethane sulphonate (Mistabron®)
Pulmonary exacerbations · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 29 participantsVery low
Hypertonic saline vs sodium‐2‐mercaptoethane sulphonate (Mistabron®)
Adverse events · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 29 participantsVery low
Hypertonic saline vs mannitol
FEV1: short‐term · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 12 participantsVery low
Hypertonic saline vs mannitol
FEV1: long‐term · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline vs mannitol
LCI · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline vs mannitol
Mortality · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 3% to 7% vs isotonic saline
Mortality · adults and children with cystic fibrosis (stable lung disease)
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline vs mannitol
Measures of sputum clearance · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 12 participantsVery low
Hypertonic saline vs mannitol
Pulmonary exacerbations · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline vs mannitol
Adverse events · adults and children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 12 participantsVery low
Hypertonic saline 7% vs xylitol
FEV1 (% predicted) change from baseline, short‐term · adults with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted2 studies · 89 participantsVery low
Hypertonic saline 7% vs xylitol
FEV1 (% predicted) change from baseline, long‐term · adults with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 7% vs xylitol
LCI · adults with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 7% vs xylitol
Mortality · adults with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 7% vs xylitol
Measures of sputum clearance · adults with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 7% vs xylitol
Pulmonary exacerbations · adults with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 59 participantsLow
Hypertonic saline 7% vs xylitol
Adverse events: serious adverse events · adults with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted2 studies · 89 participantsVery low
Hypertonic saline 3% to 7% vs isotonic saline
Measures of sputum clearance · adults and children with cystic fibrosis (stable lung disease)
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted4 studies · 80 participantsVery low
Hypertonic saline 7% vs hypertonic saline 3%
FEV1 (% predicted) change from baseline, short‐term · children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 30 participantsVery low
Hypertonic saline 7% vs hypertonic saline 3%
FEV1 (% predicted) change from baseline, long‐term · children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 7% vs hypertonic saline 3%
LCI · children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 7% vs hypertonic saline 3%
Mortality · children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 7% vs hypertonic saline 3%
Measures of sputum clearance · children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 7% vs hypertonic saline 3%
Pulmonary exacerbations · children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 7% vs hypertonic saline 3%
Adverse events · children with cystic fibrosis
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Hypertonic saline 3% to 7% vs isotonic saline
Pulmonary exacerbations · adults and children with cystic fibrosis (stable lung disease)
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted4 studies · 607 participantsVery low
Hypertonic saline 3% to 7% vs isotonic saline
Adverse events · adults and children with cystic fibrosis (stable lung disease)
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted3 studies · 513 participantsLow
Hypertonic saline 3% to 7% vs isotonic saline
FEV1 (% predicted) change from baseline, short‐term · adults and children with cystic fibrosis (during acute exacerbations of lung disease)
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 130 participantsLow
Hypertonic saline 3% to 7% vs isotonic saline
FEV1 (% predicted) change from baseline, long‐term · adults and children with cystic fibrosis (during acute exacerbations of lung disease)
Nebulised hypertonic saline for cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Bisphosphonates vs control
New vertebral fractures · adults with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted5 studies · 142 participantsVery low
Bisphosphonates vs placebo
BMD: % change in BMD at the hip or femur · children with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Bisphosphonates vs placebo
QoL · children with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Bisphosphonates vs placebo
Adverse events · children with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 113 participantsLow
Bisphosphonates vs no bisphosphonates
New vertebral fractures · adults with cystic fibrosis who have had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted12 participantsUngraded
Bisphosphonates vs no bisphosphonates
New non‐vertebral fractures · adults with cystic fibrosis who have had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted12 participantsUngraded
Bisphosphonates vs no bisphosphonates
BMD: % change in BMD at the lumbar spine · adults with cystic fibrosis who have had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted12 participantsUngraded
Bisphosphonates vs no bisphosphonates
BMD: % change in BMD at the hip or femur · adults with cystic fibrosis who have had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted12 participantsUngraded
Bisphosphonates vs no bisphosphonates
QoL · adults with cystic fibrosis who have had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extractedNRNo studies
Bisphosphonates vs no bisphosphonates
Adverse events · adults with cystic fibrosis who have had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted12 participantsUngraded
Bisphosphonates vs control
New non‐vertebral fractures · adults with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted4 studies · 95 participantsVery low
Bisphosphonates vs control
BMD: % change in BMD at the lumbar spine · adults with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted6 studies · 171 participantsLow
Bisphosphonates vs control
BMD: % change in BMD at the hip or femur · adults with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted5 studies · 155 participantsLow
Bisphosphonates vs control
QoL: change in physical and mental component scores (SF36v2) · adults with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 47 participantsLow
Bisphosphonates vs control
Adverse events: bone pain (all routes of bisphosphonate administration) · adults with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted7 studies · 206 participantsModerate
Bisphosphonates vs placebo
New vertebral fractures · children with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
OR 0.32 [0.03, 3.13]1 study · 113 participantsLow
Bisphosphonates vs placebo
New non‐vertebral fractures · children with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
OR 0.19 [0.01, 4.04]1 study · 113 participantsLow
Bisphosphonates vs placebo
BMD: % change in BMD at the lumbar spine · children with cystic fibrosis who have not had a lung transplant
Bisphosphonates for osteoporosis in people with cystic fibrosis (2023) · Cochrane
no estimate extracted1 study · 113 participantsLow