Gestational age (preterm birth < 37 weeks) · healthy pregnant women receiving calcium supplementation vs placebo or no treatment
Calcium supplementation showed no clear difference in preterm birth (a) Birth prior to 37 weeks compared with placebo or no treatment (maternal outcomes) (moderate certainty).
1 finding from 1 review
Preterm birth less than 34 weeks' gestation · healthy pregnant women receiving calcium supplementation vs placebo or no treatment
Calcium supplementation showed no clear difference in preterm birth (b) Birth prior to 34 weeks compared with placebo or no treatment (maternal outcomes) (moderate certainty).
1 finding from 1 review
Preterm birth · pregnant women
All diet and/or exercise interventions showed no clear difference in preterm birth compared with standard/other care (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
Intervention not reported
Preterm birth · Pregnant women
The intervention showed no clear difference in preterm birth (low certainty).
1 finding from 1 review
Preterm birth · pregnant women
Vitamin A alone showed no clear difference in preterm birth compared with placebo or no treatment (high certainty).
1 finding from 1 review
Preterm birth · pregnant women with a history of one or more UTI before or during pregnancy
It is very uncertain whether nitrofurantoin and close surveillance changes preterm birth (< 37 weeks) compared with close surveillance alone (very low 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
Preterm birth · women during pregnancy
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Preterm birth · women during pregnancy
Universal screening showed no clear difference in preterm birth compared with case finding (high certainty).
1 finding from 1 review
Intervention not reported
Preterm birth · Pregnant women (parity 0‐1)
The intervention showed no clear difference in preterm birth (low certainty).
1 finding from 1 review
Intervention not reported
Preterm birth · Pregnant women (parity 2+)
1 finding from 1 review
Intervention not reported
Preterm birth · Pregnant women (all parities)
The intervention showed no clear difference in preterm birth (low certainty).
1 finding from 1 review
Intervention not reported
Preterm birth · Pregnant women (parity 0‐1)
The intervention showed no clear difference in preterm birth (low certainty).
1 finding from 1 review
Intervention not reported
Utilisation of research (Thailand) (for six obstetric practices: social support during labour, magnesium sulphate for eclampsia, corticosteroids to women with preterm birth, selective episiotomy, antibiotic use at caesarean section and vacuum extr... · Healthcare decision makers, health system managers or policy makers
1 finding from 1 review
no estimate extracted
Studies not reported
Moderate
Intervention not reported
Utilisation of research (Mexico) (for six obstetric practices: social support during labour, magnesium sulphate for eclampsia, corticosteroids to women with preterm birth, selective episiotomy, antibiotic use at caesarean section and vacuum extrac... · Healthcare decision makers, health system managers or policy makers
1 finding from 1 review
no estimate extracted
Studies not reported
Moderate
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