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.

Population

Intervention or exposure

Comparison

Outcome

Any field or review title

Field or topic

Source

Review versions

103 questions in 57 reviews

current versions

No studies 4 · 3.9%Ungraded 9 · 8.7%Very low 19 · 18.4%Low 37 · 35.9%Moderate 20 · 19.4%High 14 · 13.6%

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.

Question	Effect	Evidence	Status / GRADE
Intervention NR Preterm birth < 37 weeks Gestational age was based on date of last menstrual period and was obtained at baseline · Pregnant women with HIV infection Micronutrient supplementation in pregnant women with HIV infection (2012) · Cochrane	RR 1.01 [0.74, 1.37]	1 study · 842 participants	Moderate
Intervention NR Preterm birth < 37 weeks Gestational age based on the date of last menstrual period · Pregnant women with HIV infection Micronutrient supplementation in pregnant women with HIV infection (2012) · Cochrane	RR 1.04 [0.81, 1.35]	1 study · 1030 participants	Moderate
Multivitamins vs no multivitamins Preterm birth < 37 weeks Gestational age was determined using date of last menstrual period obtained at randomisation · Pregnant and lactating women with HIV Micronutrient supplementation in pregnant women with HIV infection (2012) · Cochrane	RR 0.86 [0.68, 1.1]	1 study · 888 participants	Moderate