evidencegaps
Findings

What do systematic reviews say?

Refine by population, intervention, comparison or outcome
More filters
Evidence found and GRADE certainty

130 questions · 132 findings · 60 reviews

Sort:Best matchNewestHighest certaintyDownload CSV
No studies found 4 · 3%GRADE not reported 34 · 25.8%Very low 19 · 14.4%Low 38 · 28.8%Moderate 23 · 17.4%High 14 · 10.6%

Periodontal treatment (scaling and root planing, polishing, or surgery), alone or with oral hygiene counselling, antiseptics, or antimicrobials vs no treatment

Gestational age (preterm birth < 37 weeks) · Pregnant women considered to have periodontal disease (gingivitis or periodontitis) after dental examination

Periodontal treatment (scaling and root planing, polishing, or… showed no clear difference in gestational age (preterm birth < 37 weeks) compared with no treatment (low certainty).

1 finding from 1 review

Periodontal treatment (scaling and root planing, alone or with antimicrobials) vs Alternative (less intensive) periodontal treatment, alone or with placebo

Gestational age (preterm birth < 37 weeks) · Pregnant women considered to have periodontal disease (gingivitis or periodontitis) after dental examination

It is very uncertain whether periodontal treatment (scaling and root planing, alone or with… changes gestational age (preterm birth < 37 weeks) compared with alternative (less intensive) periodontal treatment, alone or with… (very low certainty).

3 findings from 1 review

Summary of findings: lipid‐based nutrient supplements (LNS) vs multiple micronutrients (MMN)

Preterm birth · pregnant women

Summary of findings: lipid‐based nutrient supplements (LNS) showed no clear difference in preterm births (births before 37 weeks of gestation) compared with multiple micronutrients (MMN) (moderate certainty).

1 finding from 1 review

Summary of findings: lipid‐based nutrient supplements (LNS) vs iron folic acid (IFA)

Preterm birth · pregnant women

Summary of findings: lipid‐based nutrient supplements (LNS) showed no clear difference in preterm births (births before 37 weeks of gestation) compared with iron folic acid (IFA) (moderate certainty).

1 finding from 1 review

Intervention not reported

Preterm birth < 37 weeks · pregnant women and their babies

The intervention leads to lower preterm birth < 37 weeks (high certainty).

1 finding from 1 review

Community and primary care based maternal oral health interventions vs Usual antenatal care or no structured oral health intervention

Preterm birth (<37 weeks) · Pregnant women and postpartum mothers

Maternal oral health interventions may reduce preterm birth, but the pooled RCT estimate was not statistically significant (low certainty).

1 finding from 1 review

Summary of findings table ‐ Midwife continuity models vs other models of care

Preterm birth · childbearing women and their infants (all) (important/secondary outcomes)

Summary of findings table ‐ Midwife continuity of care models showed no clear difference in preterm birth (< 37 weeks) compared with other models of care (low certainty).

1 finding from 1 review

Summary of findings table ‐ Vitamin B12 supplementation vs no supplementation or placebo

Preterm birth · pregnant women

Summary of findings table ‐ Vitamin B12 supplementation showed no clear difference in preterm birth (< 37 weeks) compared with placebo/no vitamin B12 supplementation (low certainty).

1 finding from 1 review

Nitrofurantoin and close surveillance vs close surveillance alone

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

Intervention not reported

Early preterm birth < 34 weeks · pregnant women and their babies

The intervention leads to lower early preterm birth < 34 weeks (high certainty).

1 finding from 1 review

Outcomes for all interventions for smoking cessation in pregnancy vs control: subgrouped by main intervention strategy (comparison 20)

Gestational age (preterm birth < 37 weeks) · Pregnant women who smoke

Outcomes for all interventions for smoking cessation in pregnancy showed no clear difference in preterm birth (under 37 weeks) compared with control: subgrouped by main intervention strategy (comparison 20) (high certainty).

1 finding from 1 review