Caesarean section · preterm prelabour rupture of membranes (PPROM)
Planned early birth leads to higher caesarean section compared with expectant management (high certainty).
1 finding from 1 review
Chorioamnionitis · preterm prelabour rupture of membranes (PPROM)
Planned early birth probably leads to lower chorioamnionitis compared with expectant management (moderate certainty).
1 finding from 1 review
Length of maternal hospital stay (days) · preterm prelabour rupture of membranes (PPROM)
Planned early birth showed no clear difference in length of hospital stay (maternal) compared with expectant management (moderate certainty).
1 finding from 1 review
Gestational age (preterm birth < 37 weeks) · pregnant women in second trimester of pregnancy
Antihelminthics showed no clear difference in preterm birth (birth before 37 weeks of gestation) compared with control (low certainty).
1 finding from 1 review
Intervention not reported
Preterm birth (before 37 weeks' gestation) · pregnant women considered to be at risk of developing pre‐eclampsia
The intervention leads to lower preterm birth (before 37 weeks' gestation) (high certainty).
1 finding from 1 review
Preterm birth · pregnant women and their infants..
Vitamin D + calcium supplementation may leads to higher preterm birth (less than 37 weeks' gestation) compared with placebo or no intervention (low certainty).
1 finding from 1 review
Preterm birth · pregnant women and their infants..
Vitamin D + calcium + other vitamins and minerals showed no clear difference in preterm birth (less than 37 weeks' gestation) compared with calcium + other vitamins and minerals (but no vitamin D) (low certainty).
1 finding from 1 review
Preterm birth · pregnant women and their infants..
Vitamin D supplementation showed no clear difference in preterm birth (less than 37 weeks' gestation) compared with placebo or no intervention (low certainty).
1 finding from 1 review
Preterm birth · pregnant women, either during the prenatal period or during labour.
1 finding from 1 review
no estimate extracted
0 participants
GRADE not reported
Preterm birth · pregnant women receiving vitamin E supplementation or control, living in areas where there is either inadequate dietary intake of vitamin…
Any vitamin E supplementation showed no clear difference in preterm birth (less than 37 weeks' gestation) compared with placebo, no placebo or other supplements (high certainty).
1 finding from 1 review
Intervention not reported
Preterm birth (< 37 weeks' gestation) · All pregnant women receiving either vitamin C supplementation or control either in areas where there is inadequate dietary intake or where…
The intervention showed no clear difference in preterm birth (< 37 weeks' gestation) (high certainty).
1 finding from 1 review
Preterm birth less than 34 weeks' gestation · Women with a multiple pregnancy
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Intervention not reported
Preterm birth (< 37 weeks gestation) (Any psychosocial intervention vs. control)
The intervention showed no clear difference in preterm birth (< 37 weeks gestation) (Any psychosocial intervention… (moderate certainty).
1 finding from 1 review
Gestational age (preterm birth < 37 weeks) · pregnant women accessing prenatal care
Group antenatal care showed no clear difference in preterm birth (gestational age at time of birth less than 37 weeks'… compared with individual antenatal care (adjusted data) (moderate certainty).
1 finding from 1 review
Preterm birth · women during pregnancy
1 finding from 1 review
no estimate extracted
0 participants
GRADE not reported
Preterm birth · women during pregnancy
1 finding from 1 review
no estimate extracted
0 participants
GRADE not reported
Preterm birth · women in the third trimester of pregnancy
Test of placental function showed no clear difference in preterm birth (before 37 weeks' gestation) reported gestation at birth compared with standard care (low certainty).
1 finding from 1 review
Intervention not reported
Preterm birth < 37 weeks Gestational age was based on date of last menstrual period and was obtained at baseline · Pregnant women with HIV infection
The intervention showed no clear difference in preterm birth < 37 weeks Gestational age was based on date of last… (moderate certainty).
1 finding from 1 review
Intervention not reported
Preterm birth < 37 weeks Gestational age based on the date of last menstrual period · Pregnant women with HIV infection
The intervention showed no clear difference in preterm birth < 37 weeks Gestational age based on the date of last… (moderate certainty).
1 finding from 1 review
Gestational age (preterm birth < 37 weeks) · Pregnant and lactating women with HIV
Multivitamins showed no clear difference in preterm birth < 37 weeks Gestational age was determined using date… compared with no multivitamins (moderate certainty).
1 finding from 1 review