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
Intervention NR
Severe neutropenia (WHO grade IV) Rates of patients · breast cancer patients undergoing chemotherapy
Primary prophylactic colony‐stimulating factors for the prevention of chemotherapy‐induced febrile… (2012) · Cochrane
RR 0.44 [0.17, 1.18]4 studies · 712 participantsModerate
Intervention NR
Infections Rates of patients · breast cancer patients undergoing chemotherapy
Primary prophylactic colony‐stimulating factors for the prevention of chemotherapy‐induced febrile… (2012) · Cochrane
RR 0.86 [0.72, 1.02]3 studies · 210 participantsLow
Intervention NR
Hospitalization Rates of patients · breast cancer patients undergoing chemotherapy
Primary prophylactic colony‐stimulating factors for the prevention of chemotherapy‐induced febrile… (2012) · Cochrane
RR 0.14 [0.06, 0.3]4 studies · 1149 participantsLow
Intervention NR
Antibiotics (i.v.) Rates of patients · breast cancer patients undergoing chemotherapy
Primary prophylactic colony‐stimulating factors for the prevention of chemotherapy‐induced febrile… (2012) · Cochrane
RR 0.35 [0.22, 0.55]4 studies · 1568 participantsLow
Intervention NR
Chemotherapy Rates of patients who received the planned chemotherapy doses at scheduled times and doses · breast cancer patients undergoing chemotherapy
Primary prophylactic colony‐stimulating factors for the prevention of chemotherapy‐induced febrile… (2012) · Cochrane
RR 1.05 [0.97, 1.13]4 studies · 1588 participantsLow
Intervention NR
Bone pain Rates of patients · breast cancer patients undergoing chemotherapy
Primary prophylactic colony‐stimulating factors for the prevention of chemotherapy‐induced febrile… (2012) · Cochrane
RR 5.88 [2.54, 13.6]3 studies · 388 participantsModerate
Azithromycin (single‐ or two‐dose) vs penicillin
HIV seroconversion ‐ penicillin vs single‐dose azithromycin · patients with syphilis
Genital ulcer disease treatment for reducing sexual acquisition of HIV (2012) · Cochrane
no estimate extracted1 study · 19 participantsVery low
Azithromycin (single‐ or two‐dose) vs penicillin
HIV seroconversion ‐ penicillin vs two‐dose azithromycin · patients with syphilis
Genital ulcer disease treatment for reducing sexual acquisition of HIV (2012) · Cochrane
no estimate extracted1 study · 22 participantsVery low
Fleroxacin 200 mg or TMP‐SMZ vs fleroxacin 400 mg
HIV seroconversion ‐ fleroxacin 400 mg vs fleroxacin 200 mg · patients with chancroid
Genital ulcer disease treatment for reducing sexual acquisition of HIV (2012) · Cochrane
RR 3 [0.29, 30.69]1 study · 45 participantsVery low
Fleroxacin 200 mg or TMP‐SMZ vs fleroxacin 400 mg
HIV seroconversion ‐ fleroxacin 400 mg vs TMP‐SMZ · patients with chancroid
Genital ulcer disease treatment for reducing sexual acquisition of HIV (2012) · Cochrane
RR 0.33 [0.04, 3.09]1 study · 98 participantsVery low
Intervention NR
Exchange transfusion · preterm or low birth weight infants
Prophylactic phototherapy for preventing jaundice in preterm or low birth weight infants (2012) · Cochrane
RR 0.22 [0.15, 0.34]3 studies · 2946 participantsModerate
Intervention NR
Cerebral palsy · preterm or low birth weight infants
Prophylactic phototherapy for preventing jaundice in preterm or low birth weight infants (2012) · Cochrane
RR 0.96 [0.5, 1.85]2 studies · 756 participantsModerate
Intervention NR
Peak serum bilirubin · preterm or low birth weight infants
Prophylactic phototherapy for preventing jaundice in preterm or low birth weight infants (2012) · Cochrane
no estimate extracted6 studies · 2319 participantsLow
Intervention NR
Serum bilirubin greater than 10 mg/dl · preterm or low birth weight infants
Prophylactic phototherapy for preventing jaundice in preterm or low birth weight infants (2012) · Cochrane
RR 0.27 [0.22, 0.33]3 studies · 1090 participantsModerate
Intervention NR
Retinopathy of prematurity · preterm or low birth weight infants
Prophylactic phototherapy for preventing jaundice in preterm or low birth weight infants (2012) · Cochrane
RR 0.93 [0.77, 1.13]2 studies · 1687 participantsHigh
Intervention NR
All‐cause mortality · preterm or low birth weight infants
Prophylactic phototherapy for preventing jaundice in preterm or low birth weight infants (2012) · Cochrane
RR 1.08 [0.93, 1.26]4 studies · 3044 participantsModerate
Intervention NR
Global effect: 1a. Medium‐term ‐ Average end point score on various outcomes ‐ CGI‐severity (low = favourable) ( · schizophrenia
Acetylcholinesterase inhibitors for schizophrenia (2012) · Cochrane
no estimate extracted1 study · 11 participantsUngraded
Intervention NR
Leaving the study early ‐ Adverse event: Short‐term · schizophrenia
Acetylcholinesterase inhibitors for schizophrenia (2012) · Cochrane
RR 1.91 [0.8, 4.61]6 studies · 428 participantsUngraded
Intervention NR
Mental state: 1b. Average end point score on various outcomes‐PANSS (medium‐term) ‐ Medium‐term ‐ PANSS negative end point score (low = favourable) · schizophrenia
Acetylcholinesterase inhibitors for schizophrenia (2012) · Cochrane
no estimate extracted2 studies · 31 participantsUngraded
Intervention NR
Mental state: 1b.Average end point score on various outcomes‐PANSS (medium‐term) ‐ Medium term ‐ PANSS general psychopathology end point score (low = favourable) · schizophrenia
Acetylcholinesterase inhibitors for schizophrenia (2012) · Cochrane
no estimate extracted2 studies · 31 participantsUngraded
Intervention NR
Cognitive function: 3. Short‐term ‐ Average end point score on various subscales of WAIS III (high = favourable) ‐ Digit symbol score · schizophrenia
Acetylcholinesterase inhibitors for schizophrenia (2012) · Cochrane
no estimate extracted1 study · 73 participantsUngraded
Intervention NR
Cognitive function: 4. Short‐term ‐ Average end point score on various subscales of HVLT (high = favourable) ‐ Recognition · schizophrenia
Acetylcholinesterase inhibitors for schizophrenia (2012) · Cochrane
no estimate extracted2 studies · 48 participantsUngraded
Intervention NR
Adverse event: 11a. Short‐term ‐ Average end point score on EPSEs scale (low = favourable) ‐ AIMS · schizophrenia
Acetylcholinesterase inhibitors for schizophrenia (2012) · Cochrane
no estimate extracted1 study · 35 participantsUngraded
Summary of findings: Email as additional communication method vs standard methods: Patient participants
Patient's understanding · Healthcare usersa
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted1 study · 74 participantsVery low
Summary of findings: Email as additional communication method vs standard methods: Healthcare professional participants
Health professional outcome · Physicians
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email as additional communication method vs standard methods: Healthcare professional participants
Harms · Physicians
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email counselling vs telephone counselling
Patient health status and wellbeing · Adults (25‐60 years)
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted1 study · 105 participantsVery low
Summary of findings: Email counselling vs telephone counselling
Patient behaviours and actions · Adults (25‐60 years)
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted1 study · 105 participantsVery low
Summary of findings: Email counselling vs telephone counselling
Health service outcomes · Adults (25‐60 years)
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email counselling vs telephone counselling
Health professional outcomes · Adults (25‐60 years)
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email counselling vs telephone counselling
Harms · Adults (25‐60 years)
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted1 study · 105 participantsVery low
Summary of findings: Email as additional communication method vs standard methods: Patient participants
Patient health status and wellbeing · Healthcare usersa
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted2 studies · 147 participantsVery low
Summary of findings: Email as additional communication method vs standard methods: Patient participants
Patient/caregiver views · Healthcare usersa
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted2 studies · 90 participantsVery low
Summary of findings: Email as additional communication method vs standard methods: Patient participants
Patient behaviours and actions · Healthcare usersa
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted2 studies · 147 participantsVery low
Summary of findings: Email as additional communication method vs standard methods: Patient participants
Health service outcome; resource use · Healthcare usersa
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted3 studies · 379 participantsVery low
Summary of findings: Email as additional communication method vs standard methods: Patient participants
Health professional outcomes · Healthcare usersa
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email as additional communication method vs standard methods: Patient participants
Harms · Healthcare usersa
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email as additional communication method vs standard methods: Healthcare professional participants
Patient related outcomes · Physicians
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email as additional communication method vs standard methods: Healthcare professional participants
Health service outcome; resource use · Physicians
Email for clinical communication between patients/caregivers and healthcare professionals (2012) · Cochrane
no estimate extracted2 studies · 230 participantsVery low
Summary of findings: Email communication vs standard mail
Patient or caregiver behaviours/actions · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted2 studies · 96 participantsVery low
Summary of findings: Email communication vs usual care
Healthcare professional outcomes · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email communication vs usual care
Harms · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email communication vs standard mail
Patient or caregiver understanding and support · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted1 study · 44 participantsVery low
Summary of findings: Email communication vs standard mail
Health service outcome: uptake of preventive screening · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted3 studies · 1859 participantsVery low
Summary of findings: Email communication vs standard mail
Healthcare professional outcomes · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email communication vs standard mail
Harms · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings: Email communication vs usual care
Patient or caregiver behaviours/actions · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted2 studies · 132 participantsVery low
Summary of findings: Email communication vs usual care
Patient health status and well‐being · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted1 study · 49 participantsVery low
Summary of findings: Email communication vs usual care
Patient or caregiver understanding and support · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted1 study · 49 participantsVery low
Summary of findings: Email communication vs usual care
Health service outcomes · Adultsa
Email for the provision of information on disease prevention and health promotion (2012) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded