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)

2,395 questions in 172 reviews · Gut

current versions
No studies 420 · 17.5%Ungraded 60 · 2.5%Very low 821 · 34.3%Low 602 · 25.1%Moderate 397 · 16.6%High 95 · 4%

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
Biologics vs placebo
Endoscopic improvement (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted3 studies · 197 participantsVery low
Biologics vs placebo
Withdrawals due to adverse events 12 to 44 weeks · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 1.55 [0.88, 2.74]8 studies · 792 participantsLow
Cromolyn sodium vs placebo
Clinical improvement (dichotomous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Cromolyn sodium vs placebo
Clinical improvement (continuous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 14 participantsLow
Cromolyn sodium vs placebo
Histological improvement (dichotomous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Cromolyn sodium vs placebo
Histological improvement (continuous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 15 participantsLow
Cromolyn sodium vs placebo
Endoscopic improvement (dichotomous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Cromolyn sodium vs placebo
Endoscopic improvement (continuous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Cromolyn sodium vs placebo
Withdrawals due to adverse events at 8 weeks · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 0.27 [0.01, 5.7]1 study · 16 participantsLow
PGD2R antagonist OC000459 vs placebo
Clinical improvement (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Corticosteroids vs placebo
Histological improvement (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 11.94 [6.56, 21.75]12 studies · 978 participantsHigh
PGD2R antagonist OC000459 vs placebo
Clinical improvement (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 26 participantsVery low
PGD2R antagonist OC000459 vs placebo
Histological improvement (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
PGD2R antagonist OC000459 vs placebo
Histological improvement (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 26 participantsVery low
PGD2R antagonist OC000459 vs placebo
Endoscopic improvement (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
PGD2R antagonist OC000459 vs placebo
Endoscopic improvement (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 26 participantsVery low
PGD2R antagonist OC000459 vs placebo
Withdrawals due to adverse events · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 26 participantsVery low
Swallowed fluticasone vs oral prednisone
Clinical improvement at 4 weeks (dichotomous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 1.09 [0.9, 1.33]1 study · 80 participantsVery low
Swallowed fluticasone vs oral prednisone
Clinical improvement at 4 weeks (continuous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Swallowed fluticasone vs oral prednisone
Histological improvement at 4 weeks (dichotomous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 1.1 [0.87, 1.38]1 study · 80 participantsVery low
Swallowed fluticasone vs oral prednisone
Histological improvement at 4 weeks (continuous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 68 participantsVery low
Corticosteroids vs placebo
Histological improvement (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted5 studies · 449 participantsLow
Swallowed fluticasone vs oral prednisone
Endoscopic improvement at 4 weeks (dichotomous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 1.13 [0.91, 1.41]1 study · 80 participantsVery low
Swallowed fluticasone vs oral prednisone
Endoscopic improvement (continuous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Swallowed fluticasone vs oral prednisone
Withdrawals due to adverse events at 4 weeks · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 0.5 [0.16, 1.53]1 study · 80 participantsVery low
Oral viscous budesonide vs swallowed fluticasone
Clinical improvement at study endpoint (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Oral viscous budesonide vs swallowed fluticasone
Clinical improvement at 8 weeks (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 84 participantsLow
Oral viscous budesonide vs swallowed fluticasone
Histological improvement at study endpoint (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 1.13 [0.84, 1.51]1 study · 129 participantsLow
Oral viscous budesonide vs swallowed fluticasone
Histological improvement at 8 weeks (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 111 participantsLow
Oral viscous budesonide vs swallowed fluticasone
Endoscopic improvement at study endpoint (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Oral viscous budesonide vs swallowed fluticasone
Endoscopic improvement at 8 weeks (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 111 participantsLow
Oral viscous budesonide vs swallowed fluticasone
Withdrawals due to adverse events at 8 weeks · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 0.98 [0.42, 2.32]1 study · 129 participantsLow
Corticosteroids vs placebo
Endoscopic improvement (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 2.6 [0.82, 8.19]3 studies · 102 participantsLow
Esomeprazole vs fluticasone
Clinical improvement (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Esomeprazole vs fluticasone
Clinical improvement at 8 weeks (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted2 studies · 67 participantsVery low
Esomeprazole vs fluticasone
Histological improvement at 8 weeks (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 1.62 [0.77, 3.41]2 studies · 72 participantsVery low
Esomeprazole vs fluticasone
Histological improvement at 8 weeks (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted2 studies · 70 participantsVery low
Esomeprazole vs fluticasone
Endoscopic improvement (dichotomous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Esomeprazole vs fluticasone
Endoscopic improvement (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
Esomeprazole vs fluticasone
Withdrawals due to adverse events at 8 weeks · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 0.95 [0.07, 13.38]2 studies · 72 participantsVery low
One‐food elimination diet vs four‐food elimination diet
Clinical improvement (dichotomous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
One‐food elimination diet vs four‐food elimination diet
Clinical improvement at 12 weeks (continuous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 50 participantsVery low
One‐food elimination diet vs four‐food elimination diet
Histological improvement at 12 weeks (dichotomous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 2.26 [1.15, 4.43]1 study · 63 participantsVery low
Corticosteroids vs placebo
Endoscopic improvement (continuous) · active EoE patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted5 studies · 596 participantsLow
One‐food elimination diet vs four‐food elimination diet
Histological improvement at study endpoint (continuous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
One‐food elimination diet vs four‐food elimination diet
Endoscopic improvement at study endpoint (dichotomous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
One‐food elimination diet vs four‐food elimination diet
Endoscopic improvement at 12 weeks (continuous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 34 participantsVery low
One‐food elimination diet vs four‐food elimination diet
Withdrawals due to adverse events at 12 weeks · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
RR 0.33 [0.11, 0.98]1 study · 63 participantsVery low
One‐food elimination diet vs six‐food elimination diet
Clinical improvement (dichotomous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extractedNRNo studies
One‐food elimination diet vs six‐food elimination diet
Clinical improvement at 6 weeks (continuous) · active EoE pediatric patients
Medical treatment of eosinophilic esophagitis (2023) · Cochrane
no estimate extracted1 study · 129 participantsVery low