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)

1,852 questions in 128 reviews · Effective Practice and Organisation of Care

current versions
No studies 557 · 30.1%Ungraded 53 · 2.9%Very low 446 · 24.1%Low 476 · 25.7%Moderate 255 · 13.8%High 65 · 3.5%

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
Spontaneous vaginal birth · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Instrumental vaginal birth · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Maternal mortality · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRHigh
Intervention NR
Maternal morbidity · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Neonatal mortality · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRHigh
Intervention NR
Neonatal morbidity · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRHigh
Intervention NR
Caesarean section ‐ overall · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRHigh
Intervention NR
Spontaneous vaginal birth · mixed population (women with a fear of childbirth; women with high levels of anxiety; husbands of pregnant women;…
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
RR 2.25 [1.16, 4.36]NRLow
Intervention NR
Caesarean section ‐ low risk group · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRHigh
Intervention NR
Elective repeat caesarean section · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRHigh
Intervention NR
Major maternal morbidity · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
RD 0.03NRHigh
Intervention NR
Minor maternal morbidity · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
RD 0.3NRHigh
Intervention NR
Major neonatal morbidity · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRHigh
Intervention NR
Minor neonatal morbidity · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRHigh
Intervention NR
Intrapartum and neonatal deaths · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRHigh
Intervention NR
Caesarean section – unscheduled · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRHigh
Intervention NR
Maternal mortality or morbidity · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Caesarean section · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
OR 1.29 [0.99, 1.67]NRLow
Intervention NR
Instrumental vaginal birth · mixed population (women with a fear of childbirth; women with high levels of anxiety; husbands of pregnant women;…
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Neonatal mortality or morbidity · nurses, midwives, physicians
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Primary outcome measure
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Caesarean section
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRVery low
Intervention NR
Spontaneous vaginal birth
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Instrumental vaginal birth
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Maternal mortality or morbidity
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Neonatal mortality or morbidity
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Primary caesarean section
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
OR 0.56NRLow
Intervention NR
VBAC
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
OR 2.03NRLow
Intervention NR
Maternal mortality
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Maternal mortality or morbidity · mixed population (women with a fear of childbirth; women with high levels of anxiety; husbands of pregnant women;…
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Maternal morbidity
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
OR 1.07 [0.88, 1.3]NRLow
Intervention NR
Neonatal mortality
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Neonatal morbidity
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
OR 1.09 [0.69, 1.72]NRLow
Intervention NR
Primary outcome measure
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Caesarean section
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRVery low
Intervention NR
Spontaneous vaginal birth
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Instrumental vaginal birth
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Maternal mortality
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Maternal morbidity
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRVery low
Intervention NR
Neonatal morbidity
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Neonatal mortality or morbidity · mixed population (women with a fear of childbirth; women with high levels of anxiety; husbands of pregnant women;…
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Maternal or neonatal mortality
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
VBAC
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRVery low
Intervention NR
Maternal mortality or morbidity
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Neonatal mortality
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Spontaneous vaginal birth – physiologic birth · mixed population (women with a fear of childbirth; women with high levels of anxiety; husbands of pregnant women;…
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
no estimate extractedNRModerate
Intervention NR
Spontaneous vaginal birth – normal vaginal birth · mixed population (women with a fear of childbirth; women with high levels of anxiety; husbands of pregnant women;…
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
RR 0.84 [0.62, 1.14]NRModerate
Intervention NR
Caesarean section – elective · mixed population (women with a fear of childbirth; women with high levels of anxiety; husbands of pregnant women;…
Non‐clinical interventions for reducing unnecessary caesarean section (2018) · Cochrane
RR 0.95 [0.58, 1.56]NRModerate
Interventions targeting patients vs usual care or interventions of the same type
Shared decision making (observer based outcome measure (OBOM), continuous measures) ( · patients, including healthcare consumers and simulated patients
Interventions for increasing the use of shared decision making by healthcare professionals (2018) · Cochrane
no estimate extracted424 participantsVery low
Interventions targeting patients vs usual care or interventions of the same type
Shared decision making (PROM, continuous) ( · patients, including healthcare consumers and simulated patients
Interventions for increasing the use of shared decision making by healthcare professionals (2018) · Cochrane
no estimate extracted1906 participantsVery low