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)

15,213 questions in 2,394 reviews

current versions
No studies 15,213 · 100%Ungraded 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

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
Posterior cruciate ligament retention vs posterior stabilised sacrifice
Global assessment (patient) · Patients receiving total knee arthroplasty with or without posterior stabilised design for the treatment of…
Retention versus sacrifice of the posterior cruciate ligament in total knee arthroplasty for treating… (2013) · Cochrane
no estimate extractedNRNo studies
Posterior cruciate ligament retention vs posterior stabilised sacrifice
Complications · Patients receiving total knee arthroplasty with or without posterior stabilised design for the treatment of…
Retention versus sacrifice of the posterior cruciate ligament in total knee arthroplasty for treating… (2013) · Cochrane
no estimate extractedNRNo studies
Posterior cruciate ligament retention vs posterior stabilised sacrifice
Re‐operation rate (not involving implant change, short‐ and long‐term) · Patients receiving total knee arthroplasty with or without posterior stabilised design for the treatment of…
Retention versus sacrifice of the posterior cruciate ligament in total knee arthroplasty for treating… (2013) · Cochrane
no estimate extractedNRNo studies
Posterior cruciate ligament retention vs sacrifice (all types of arthroplasty designs)
Survival rate of the implant (Revision surgery reported) · Patients receiving total knee arthroplasty with or without posterior stabilised design for the treatment of…
Retention versus sacrifice of the posterior cruciate ligament in total knee arthroplasty for treating… (2013) · Cochrane
no estimate extractedNRNo studies
Posterior cruciate ligament retention vs sacrifice (all types of arthroplasty designs)
Complications · Patients receiving total knee arthroplasty with or without posterior stabilised design for the treatment of…
Retention versus sacrifice of the posterior cruciate ligament in total knee arthroplasty for treating… (2013) · Cochrane
no estimate extractedNRNo studies
Posterior cruciate ligament retention vs sacrifice (all types of arthroplasty designs)
Re‐operation rate (not involving implant change, short and long term) · Patients receiving total knee arthroplasty with or without posterior stabilised design for the treatment of…
Retention versus sacrifice of the posterior cruciate ligament in total knee arthroplasty for treating… (2013) · Cochrane
no estimate extractedNRNo studies
Posterior cruciate ligament retention vs sacrifice (using the same arthroplasty design)
Knee pain Knee Society Score, sub score pain (possible range 0 (severe pain) ‐ 50 (no pain) points) · Patients receiving total knee arthroplasty with or without resection of the posterior cruciate ligament for the…
Retention versus sacrifice of the posterior cruciate ligament in total knee arthroplasty for treating… (2013) · Cochrane
no estimate extractedNRNo studies
Herbal preparations vs placebo
Change in fibroid related symptoms · Women with uterine fibroids
Herbal preparations for uterine fibroids (2013) · Cochrane
no estimate extractedNRNo studies
Herbal preparations vs placebo
Adverse events · Women with uterine fibroids
Herbal preparations for uterine fibroids (2013) · Cochrane
no estimate extractedNRNo studies
Herbal preparations vs medication
Change in fibroid related symptoms · Women with uterine fibroids
Herbal preparations for uterine fibroids (2013) · Cochrane
no estimate extractedNRNo studies
Herbal preparations plus medication vs medication
Change in fibroid related symptoms · Women with uterine fibroids
Herbal preparations for uterine fibroids (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Visual field defects · people with glaucoma or ocular hypertension
Interventions for improving adherence to ocular hypotensive therapy (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Quality of life · people with glaucoma or ocular hypertension
Interventions for improving adherence to ocular hypotensive therapy (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Adverse effects · people with glaucoma or ocular hypertension
Interventions for improving adherence to ocular hypotensive therapy (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Patient outcome · Health professionals
Educational games for health professionals (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Professional behavior (process of care outcomes) · Health professionals
Educational games for health professionals (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Interferon vs. control · patients undergoing liver transplantation for chronic hepatitis C viral infection.
Antiviral prophylaxis for the prevention of chronic hepatitis C virus in patients undergoing liver… (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
HCV antibody vs. placebo · patients undergoing liver transplantation for chronic hepatitis C viral infection.
Antiviral prophylaxis for the prevention of chronic hepatitis C virus in patients undergoing liver… (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Interferon vs. control · patients undergoing liver transplantation for chronic hepatitis C viral infection.
Antiviral prophylaxis for the prevention of chronic hepatitis C virus in patients undergoing liver… (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
HCV antibody vs. placebo · patients undergoing liver transplantation for chronic hepatitis C viral infection.
Antiviral prophylaxis for the prevention of chronic hepatitis C virus in patients undergoing liver… (2013) · Cochrane
no estimate extractedNRNo studies
DANCE THERAPY vs STANDARD CARE
Service utilisation‐days in hospital · patients with schizophrenia
Dance therapy for schizophrenia (2013) · Cochrane
no estimate extractedNRNo studies
Acupuncture vs medication
Physical function · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Acupuncture vs medication
Global well‐being: rated by participants · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Acupuncture vs medication
Sleep · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Acupuncture vs medication
Fatigue · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Acupuncture vs non‐acupuncture
Physical function · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Acupuncture vs medication
Stiffness · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Physical function MOS SF‐363 · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Global well‐being: rated by participants · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Sleep · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Fatigue · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Stiffness · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Deep invasive acupuncture stimulation vs non‐stimulated acupuncture
Global well‐being: rated by participants · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Deep invasive acupuncture stimulation vs non‐stimulated acupuncture
Sleep · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Deep invasive acupuncture stimulation vs non‐stimulated acupuncture
Stiffness · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Deep invasive acupuncture stimulation vs non‐stimulated acupuncture
Adverse events · patients with fibromyalgia
Acupuncture for treating fibromyalgia (2013) · Cochrane
no estimate extractedNRNo studies
Probiotic vs placebo
Death from any cause ‐ not measured · Children with persistent diarrhoea
Probiotics for treating persistent diarrhoea in children (2013) · Cochrane
no estimate extractedNRNo studies
Probiotic vs placebo
Weight‐for‐age z score ‐ not measured · Children with persistent diarrhoea
Probiotics for treating persistent diarrhoea in children (2013) · Cochrane
no estimate extractedNRNo studies
Mobile phone text message reminders vs no reminders
Other outcomes · Patients with healthcare appointments
Mobile phone messaging reminders for attendance at healthcare appointments (2013) · Cochrane
no estimate extractedNRNo studies
Mobile phone message text reminders plus postal reminders vs postal reminders alone
Other outcomes · Patients with healthcare appointments
Mobile phone messaging reminders for attendance at healthcare appointments (2013) · Cochrane
no estimate extractedNRNo studies
Mobile phone message reminders vs phone call reminders
Adverse outcomes · patients with healthcare appointments
Mobile phone messaging reminders for attendance at healthcare appointments (2013) · Cochrane
no estimate extractedNRNo studies
Mobile phone message reminders vs phone call reminders
Other outcomes · patients with healthcare appointments
Mobile phone messaging reminders for attendance at healthcare appointments (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Sustained pain‐free at 24 h · adults with migraine headache ‐ moderate or severe pain
Ibuprofen with or without an antiemetic for acute migraine headaches in adults (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Serious AE · adults with migraine headache ‐ moderate or severe pain
Ibuprofen with or without an antiemetic for acute migraine headaches in adults (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Sustained pain‐free at 24 h · adults with migraine headache ‐ moderate or severe pain
Paracetamol (acetaminophen) with or without an antiemetic for acute migraine headaches in adults (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Sustained headache relief at 24 h · adults with migraine headache ‐ moderate or severe pain
Paracetamol (acetaminophen) with or without an antiemetic for acute migraine headaches in adults (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Serious AE · adults with migraine headache ‐ moderate or severe pain
Paracetamol (acetaminophen) with or without an antiemetic for acute migraine headaches in adults (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Sustained pain‐free at 24 h · migraine headache ‐ moderate or severe pain
Aspirin with or without an antiemetic for acute migraine headaches in adults (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Serious AE · migraine headache ‐ moderate or severe pain
Aspirin with or without an antiemetic for acute migraine headaches in adults (2013) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Serious AE · adults with cluster headache
Triptans for acute cluster headache (2013) · Cochrane
no estimate extractedNRNo studies