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
Oromucosal cannabis (Sativex) vs placebo
Withdrawal due to adverse events · patients with pain management in patients with rheumatoid arthritis
Neuromodulators for pain management in rheumatoid arthritis (2012) · Cochrane
RR 0.13 [0.01, 2.39]1 study · 58 participantsLow
Oromucosal cannabis (Sativex) vs placebo
Total adverse events · patients with pain management in patients with rheumatoid arthritis
Neuromodulators for pain management in rheumatoid arthritis (2012) · Cochrane
RR 1.82 [1.1, 3]1 study · 58 participantsLow
Muscle relaxant vs control
Pain ‐ 24hrs (Single dose) · patients with pain management in rheumatoid arthritis
Muscle relaxants for pain management in rheumatoid arthritis (2012) · Cochrane
no estimate extracted3 studies · 104 participantsLow
Muscle relaxant vs control
Pain ‐ 1‐2 weeks · patients with pain management in rheumatoid arthritis
Muscle relaxants for pain management in rheumatoid arthritis (2012) · Cochrane
no estimate extracted3 studies · 104 participantsVery low
Muscle relaxant vs control
Withdrawal due to Adverse Events · patients with pain management in rheumatoid arthritis
Muscle relaxants for pain management in rheumatoid arthritis (2012) · Cochrane
RR 2.84 [0.31, 26.08]5 studies · 180 participantsVery low
Muscle relaxant vs control
Total Number of Adverse Events ‐ only studies >24hrs duration · patients with pain management in rheumatoid arthritis
Muscle relaxants for pain management in rheumatoid arthritis (2012) · Cochrane
RR 4.03 [1.08, 15.1]2 studies · 74 participantsVery low
Muscle relaxant vs control
Total Number of Adverse Events ‐ single dose studies · patients with pain management in rheumatoid arthritis
Muscle relaxants for pain management in rheumatoid arthritis (2012) · Cochrane
RR 1.4 [0.58, 3.41]3 studies · 106 participantsVery low
Muscle relaxant vs control
CNS adverse events · patients with pain management in rheumatoid arthritis
Muscle relaxants for pain management in rheumatoid arthritis (2012) · Cochrane
RR 5.96 [1.77, 20.08]2 studies · 74 participantsVery low
CBT vs control
Gambling symptom severity ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced gambling symptom severity, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted7 studies · 402 participantsVery low
Integrative therapy vs control
Gambling symptom severity ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced gambling symptom severity, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted2 studies · 137 participantsVery low
Integrative therapy vs control
Financial loss from gambling ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced financial loss from gambling, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted2 studies · 137 participantsVery low
Integrative therapy vs control
Frequency of gambling ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced financial loss from gambling, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted1 study · 52 participantsLow
CBT vs control
Financial loss from gambling ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced financial loss from gambling, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted7 studies · 505 participantsLow
CBT vs control
Frequency of gambling ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced severity of gambling, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted7 studies · 505 participantsLow
CBT vs control
Diagnoses of pathological gambling ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced rates of pathological gambling, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
RR 0.13 [0.05, 0.31]2 studies · 81 participantsLow
CBT vs control
Depression symptoms ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced depression symptoms, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted4 studies · 276 participantsLow
CBT vs control
Anxiety symptoms ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced anxiety symptoms, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted4 studies · 276 participantsLow
MI therapy vs control
Gambling symptom severity ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced gambling symptom severity, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted2 studies · 163 participantsVery low
MI therapy vs control
Financial loss from gambling ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced financial loss from gambling, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted3 studies · 244 participantsVery low
MI therapy vs control
Frequency of gambling ‐ comparisons at 0 to 3 months post‐treatment Lower scores indicate reduced financial loss from gambling, and thus positive outcomes1 · patients with pathological and problem gambling
Psychological therapies for pathological and problem gambling (2012) · Cochrane
no estimate extracted2 studies · 145 participantsVery low
Embryo culture with low oxygen concentration vs embryo culture with atmospheric oxygen concentration
Live birth rate · Patients with live birth rate
Low oxygen concentrations for embryo culture in assisted reproductive technologies (2012) · Cochrane
OR 1.39 [1.11, 1.76]3 studies · 1291 participantsModerate
Embryo culture with low oxygen concentration vs embryo culture with atmospheric oxygen concentration
Ongoing pregnancy rate · Patients with ongoing pregnancy
Low oxygen concentrations for embryo culture in assisted reproductive technologies (2012) · Cochrane
OR 1.4 [1.11, 1.77]3 studies · 1291 participantsModerate
Embryo culture with low oxygen concentration vs embryo culture with atmospheric oxygen concentration
Clinical pregnancy rate · Patients with clinical pregnancy rate
Low oxygen concentrations for embryo culture in assisted reproductive technologies (2012) · Cochrane
OR 1.35 [1.08, 1.67]4 studies · 1382 participantsModerate
Embryo culture with low oxygen concentration vs embryo culture with atmospheric oxygen concentration
Multiple‐pregnancy rate · Patients with multiple pregnancy rate
Low oxygen concentrations for embryo culture in assisted reproductive technologies (2012) · Cochrane
OR 1.33 [0.91, 1.95]4 studies · 1382 participantsLow
Embryo culture with low oxygen concentration vs embryo culture with atmospheric oxygen concentration
Miscarriage rate · patients with miscarriage rate
Low oxygen concentrations for embryo culture in assisted reproductive technologies (2012) · Cochrane
OR 1.28 [0.86, 1.9]3 studies · 1291 participantsLow
Embryo culture with low oxygen concentration vs embryo culture with atmospheric oxygen concentration
Congenital abnormalities · patients with congenital abnormalities
Low oxygen concentrations for embryo culture in assisted reproductive technologies (2012) · Cochrane
OR 0.2 [0.01, 4.09]1 study · 647 participantsVery low
Intervention NR
Overall survival Median · patients with indolent B cell lymphoid malignancy
Bendamustine for patients with indolent B cell lymphoid malignancies including chronic lymphocytic leukaemia (2012) · Cochrane
no estimate extracted2 studies · 481 participantsModerate
Intervention NR
All‐cause mortality Median · patients with indolent B cell lymphoid malignancy
Bendamustine for patients with indolent B cell lymphoid malignancies including chronic lymphocytic leukaemia (2012) · Cochrane
no estimate extracted4 studies · 1202 participantsModerate
Intervention NR
Smoking abstinence · s
Interventions for smoking cessation in Indigenous populations (2012) · Cochrane
RR 1.43 [1.03, 1.98]4 studies · 1081 participantsVery low
Intervention NR
Attitudes ‐ readiness to quit · s
Interventions for smoking cessation in Indigenous populations (2012) · Cochrane
RR 1.64 [0.82, 3.3]1 study · 92 participantsVery low
Intervention NR
Clinically apparent hepatitis A (low risk of bias trials) Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.09 [0.03, 0.3]3 studies · 41430 participantsHigh
Intervention NR
Clinically apparent hepatitis A (Dose of live attenuated HAV vaccine, titre < TCID50 ) all included trials Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.11 [0.05, 0.26]3 studies · 628420 participantsVery low
Intervention NR
Clinically apparent hepatitis A (low endemicity) low risk of bias Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.19 [0.08, 0.42]1 study · 1037 participantsHigh
Intervention NR
Clinically apparent hepatitis A (low endemicity) all included trials Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.19 [0.08, 0.42]1 study · 1037 participantsHigh
Intervention NR
Clinically apparent hepatitis A (high endemicity) low risk of bias Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.05 [0.01, 0.17]2 studies · 40393 participantsHigh
Intervention NR
Clinically apparent hepatitis A (high endemicity) all included trials Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.08 [0.04, 0.15]8 studies · 731343 participantsVery low
Intervention NR
Clinically apparent hepatitis A (single dose regimen) low risk of bias Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.03 [0, 0.47]1 study · 274 participantsHigh
Intervention NR
Clinically apparent hepatitis A (single dose regimen) all included studies Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.07 [0.03, 0.15]6 studies · 690707 participantsVery low
Intervention NR
Clinically apparent hepatitis A (multiple doses) low risk of bias Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.11 [0.03, 0.4]2 studies · 41156 participantsHigh
Intervention NR
Clinically apparent hepatitis A (multiple doses) all included trials Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.14 [0.05, 0.37]3 studies · 41416 participantsModerate
Intervention NR
Clinically apparent hepatitis A ( · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.19 [0.08, 0.42]1 study · 1037 participantsHigh
Intervention NR
Clinically apparent hepatitis A (all included trials) Dienstag 1999 · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.09 [0.05, 0.17]9 studies · 732380 participantsVery low
Intervention NR
Clinically apparent hepatitis A ( · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.2 [0.1, 0.37]3 studies · 2377 participantsVery low
Intervention NR
Clinically apparent hepatitis A ( · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.05 [0.01, 0.17]2 studies · 40393 participantsHigh
Intervention NR
Clinicially apparent hepatitis A ( · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.06 [0.02, 0.17]4 studies · 164776 participantsVery low
Intervention NR
Clinically apparent hepatitis A ( · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Clinicially apparent hepatitis A ( · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.05 [0.02, 0.13]1 study · 564642 participantsLow
Intervention NR
Clinically apparent hepatitis A ( · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Clinically apparent hepatitis A ( · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 0.06 [0.01, 0.41]1 study · 585 participantsLow
Intervention NR
All‐cause mortality low risk of bias Mortality · patients with preventing hepatitis A.
Hepatitis A immunisation in persons not previously exposed to hepatitis A (2012) · Cochrane
RR 1.4 [0.62, 3.16]1 study · 585 participantsHigh