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. Every word you type has to appear somewhere in the question, and the closest matches are ranked first.

Limit to evidence status or GRADE (optional)

75,239 questions in 5,342 reviews

current versions
No studies 15,213 · 20.2%Ungraded 10,323 · 13.7%Very low 17,528 · 23.3%Low 17,951 · 23.9%Moderate 11,190 · 14.9%High 3,034 · 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
Doxepin cream vs oral antihistamine
Adverse events (somnolence) · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
RR 0.64 [0.32, 1.25]1 study · 24 participantsVery low
Extracorporeal shock wave therapy vs sham
Adverse events · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
no estimate extractedNRNo studies
Extracorporeal shock wave therapy vs sham
Pain Pressure pain threshold (PPT) ( · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
MD 2.96 [1.76, 4.16]1 study · 45 participantsLow
Pulsed high‐intensity laser vs placebo laser
Change in burn‐related pruritus Itch Severity Scale (ISS) ( · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
no estimate extracted1 study · 49 participantsModerate
Pulsed high‐intensity laser vs placebo laser
Adverse events · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
no estimate extractedNRNo studies
Pulsed high‐intensity laser vs placebo laser
Pain VAS ( · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
no estimate extracted1 study · 49 participantsModerate
Doxepin cream vs oral antihistamine
Pain · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
no estimate extractedNRNo studies
Gabapentin vs cetirizine (antihistamine)
Change in burn‐related pruritus (VAS) ( · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
no estimate extracted1 study · 40 participantsLow
Gabapentin vs cetirizine (antihistamine)
Adverse events (somnolence) · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
RR 0.02 [0, 0.38]1 study · 40 participantsLow
Gabapentin vs cetirizine (antihistamine)
Pain · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
no estimate extractedNRNo studies
Pregabalin vs cetirizine with pheniramine maleate (antihistamine)
Change in burn‐related pruritus (VAS) ( · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
no estimate extracted1 study · 40 participantsLow
Pregabalin vs cetirizine with pheniramine maleate (antihistamine)
Adverse events (drowsiness) · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
RR 0.04 [0, 0.69]1 study · 40 participantsLow
Pregabalin vs cetirizine with pheniramine maleate (antihistamine)
Pain · people with postburn pruritus
Interventions for postburn pruritus (2024) · Cochrane
no estimate extractedNRNo studies
Anti‐CD20 mAb maintenance therapy vs observation
Overall survival · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
HR 0.94 [0.73, 1.2]3 studies · 1152 participantsModerate
Immunomodulatory drug maintenance therapy vs placebo/observation
Grade 3/4 adverse events · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
Rate ratio 1.82 [1.38, 2.38]2 studies · 400 participantsLow
Immunomodulatory drug maintenance therapy vs placebo/observation
Progression‐free survival · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
HR 0.37 [0.19, 0.73]3 studies · 461 participantsModerate
Immunomodulatory drug maintenance therapy vs placebo/observation
Treatment‐related mortality · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
Risk ratio 1.22 [0.35, 4.29]3 studies · 458 participantsLow
Immunomodulatory drug maintenance therapy vs placebo/observation
Treatment discontinuation · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
Risk ratio 0.71 [0.47, 1.05]2 studies · 400 participantsVery low
Immunomodulatory drug maintenance therapy vs placebo/observation
All adverse events · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
Rate ratio 1.41 [1.28, 1.54]3 studies · 458 participantsModerate
Anti‐CD52 mAb maintenance therapy vs observation
Overall survival – not reported · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
no estimate extractedNRNo studies
Anti‐CD52 mAb maintenance therapy vs observation
Health‐related quality of life – not reported · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
no estimate extractedNRNo studies
Anti‐CD52 mAb maintenance therapy vs observation
Grade 3/4 adverse events – not reported · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
no estimate extractedNRNo studies
Anti‐CD52 mAb maintenance therapy vs observation
Progression‐free survival · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
HR 0.55 [0.32, 0.95]1 study · 21 participantsVery low
Anti‐CD52 mAb maintenance therapy vs observation
Treatment‐related mortality – not reported · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
no estimate extractedNRNo studies
Anti‐CD20 mAb maintenance therapy vs observation
Health‐related quality of life · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
no estimate extracted1 study · 480 participantsLow
Anti‐CD52 mAb maintenance therapy vs observation
Treatment discontinuation – not reported · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
no estimate extractedNRNo studies
Anti‐CD52 mAb maintenance therapy vs observation
All adverse events – not reported · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
no estimate extractedNRNo studies
Anti‐CD20 mAb maintenance therapy vs observation
Grade 3/4 adverse events · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
Rate ratio 1.34 [1.06, 1.71]5 studies · 1284 participantsLow
Anti‐CD20 mAb maintenance therapy vs observation
Progression‐free survival · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
HR 0.61 [0.5, 0.73]5 studies · 1255 participantsModerate
Anti‐CD20 mAb maintenance therapy vs observation
Treatment‐related mortality · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
Risk ratio 0.82 [0.39, 1.71]4 studies · 1189 participantsLow
Anti‐CD20 mAb maintenance therapy vs observation
Treatment discontinuation · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
Risk ratio 0.93 [0.72, 1.2]6 studies · 1321 participantsLow
Anti‐CD20 mAb maintenance therapy vs observation
All adverse events · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
Rate ratio 1.23 [1.03, 1.47]6 studies · 1321 participantsLow
Immunomodulatory drug maintenance therapy vs placebo/observation
Overall survival · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
HR 0.91 [0.61, 1.35]3 studies · 461 participantsModerate
Immunomodulatory drug maintenance therapy vs placebo/observation
Health‐related quality of life – not reported · people with chronic lymphocytic leukaemia
Maintenance therapy for chronic lymphocytic leukaemia (2024) · Cochrane
no estimate extractedNRNo studies
Pressure‐garment therapy (PGT) vs no treatment/lanolin
Scar improvement (VSS) (0–13, higher score = more severe scarring) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted3 studies · 187 participantsVery low
Pressure‐garment therapy (PGT) vs silicone
Pain (POSAS 0–10, higher score = more severe pain, VAS 0–10, higher score = more severe pruritus) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted2 studies · 263 participantsVery low
Pressure‐garment therapy (PGT) vs silicone
Pruritus (POSAS 0–10, higher score = more severe pruritus; TPIS 0–3, higher score = more severe pruritus; VAS 0–10, higher score = more severe pruritus) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted2 studies · 263 participantsVery low
Pressure‐garment therapy (PGT) vs silicone
Quality of life (CHU‐9D 0–1, with 1 representing full health; BBSIP 0–5, higher scores = more severe impact) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted1 study · 159 participantsVery low
Pressure‐garment therapy (PGT) vs silicone
Adverse events · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted1 study · 159 participantsVery low
Pressure‐garment therapy (PGT) vs silicone
Adherence · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted1 study · 159 participantsVery low
Pressure‐garment therapy (PGT) plus silicone vs no treatment/lanolin
Scar improvement (VSS) (0–13, higher score = more severe scarring) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted1 study · 96 participantsVery low
Pressure‐garment therapy (PGT) plus silicone vs no treatment/lanolin
Scar improvement (POSAS) (0–10, higher score = more severe scarring) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extractedNRNo studies
Pressure‐garment therapy (PGT) plus silicone vs no treatment/lanolin
Pain (VAS 0–10, higher score = more severe pain) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted1 study · 104 participantsVery low
Pressure‐garment therapy (PGT) plus silicone vs no treatment/lanolin
Pruritus (VAS 0–10, higher score = more severe pruritus) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted1 study · 104 participantsVery low
Pressure‐garment therapy (PGT) plus silicone vs no treatment/lanolin
Quality of life · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extractedNRNo studies
Pressure‐garment therapy (PGT) vs no treatment/lanolin
Scar improvement (POSAS) (0–10, higher score = more severe scarring) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extractedNRNo studies
Pressure‐garment therapy (PGT) plus silicone vs no treatment/lanolin
Adverse events · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted1 study · 104 participantsVery low
Pressure‐garment therapy (PGT) plus silicone vs no treatment/lanolin
Adherence · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extractedNRNo studies
Pressure‐garment therapy (PGT) plus silicone vs silicone
Scar improvement (VSS) (0–13, higher score = more severe scarring) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted1 study · 96 participantsVery low
Pressure‐garment therapy (PGT) plus silicone vs silicone
Scar improvement (POSAS) (0–10, higher score = more severe scarring) · people with burn wounds likely to develop hypertrophic scarring
Pressure‐garment therapy for preventing hypertrophic scarring after burn injury (2024) · Cochrane
no estimate extracted1 study · 159 participantsVery low