Findings

What do systematic reviews say?

25 questions · 25 findings · 1 reviews

No studies found 0 · 0%GRADE not reported 24 · 96%Very low 0 · 0%Low 0 · 0%Moderate 1 · 4%High 0 · 0%

Preterm birth (<37 weeks) · Pregnant women

Periodontitis definition: >=3 mm CAL: OR 2.50 (1.60 to 3.90) for preterm birth, significant.

1 finding from 1 review

The Risk of Preterm Birth in Women With Periodontitis: A Systematic Review and Meta-Analysis. 2026 All outcomes
Delivery · Periodontitis definition: >=3 mm CAL
OR 2.50 [1.60, 3.90]
6 studies
GRADE not reported

Preterm birth (<37 weeks) · Pregnant women

Periodontitis definition: >=1 mm CAL: OR 2.87 (1.65 to 4.99) for preterm birth, significant.

1 finding from 1 review

The Risk of Preterm Birth in Women With Periodontitis: A Systematic Review and Meta-Analysis. 2026 All outcomes
Delivery · Periodontitis definition: >=1 mm CAL
OR 2.87 [1.65, 4.99]
2 studies
GRADE not reported

Preterm birth (<37 weeks) · Pregnant women

Studies including participants with co-morbidities: OR 2.16 (1.54 to 3.03) for preterm birth, significant.

1 finding from 1 review

The Risk of Preterm Birth in Women With Periodontitis: A Systematic Review and Meta-Analysis. 2026 All outcomes
Delivery · Studies including participants with co-morbidities
OR 2.16 [1.54, 3.03]
4 studies
GRADE not reported

Preterm birth (<37 weeks) · Pregnant women

Examined teeth: full mouth without specification on third molars: OR 2.77 (1.72 to 4.44) for preterm birth, significant.

1 finding from 1 review

The Risk of Preterm Birth in Women With Periodontitis: A Systematic Review and Meta-Analysis. 2026 All outcomes
Delivery · Examined teeth: full mouth without specification on third molars
OR 2.77 [1.72, 4.44]
6 studies
GRADE not reported

Preterm birth (<37 weeks) · Pregnant women

Risk of bias: high: OR 1.60 (0.75 to 3.44) for preterm birth, not significant.

1 finding from 1 review

The Risk of Preterm Birth in Women With Periodontitis: A Systematic Review and Meta-Analysis. 2026 All outcomes
Delivery · Risk of bias: high
OR 1.60 [0.75, 3.44]
2 studies
GRADE not reported