Term birth >37 weeks | Preterm birth <37 weeks | Total | |
---|---|---|---|
n/N (%) | 127/161 (79%) | 34/161 (21%) | 161/161 (100%) |
BMI | |||
Mean ± SD (range) | 24.3 ± 4.4 (18–48) | 24.3 ± 4.4 (18.4–35) | 24.3 ± 4.4 (18–48) |
Ethnicity, n/N (%) | |||
Caucasian | 86/127 (68%) | 18/34 (53%) | 104/161 (65%) |
Asian | 22/127 (17%) | 5/34 (15%) | 27/161 (17%) |
Black | 19/127 (15%) | 11/34 (32%)* | 30/161 (19%) |
Smoker, n/N (%) | 8/127 (6%) | 3/34 (9%) | 11/161 (7%) |
Gestation at sample (weeks) | |||
Mean ± SD (range) | 17+0 ± 1.0 (13+1–18+4) | 16+4 ± 1.4 (12+1–18+4) | 16+6 ± 1.1 (12+1–18+4) |
Cervical length (mm) | |||
Mean ± SD (range) | 32.5 ± 1.0 (18–50) | 30.6 ± 6.4 (10–40) | 32 ± 5.6 (10–50) |
Intervention n/N (%) | |||
No intervention | 60/127 (47%) | 10/32 (29%) | 70/161 (43%) |
Cerclage | 51/127 (40%) | 20/32 (59%) | 71/161 (44%) |
Progesterone | 16/127 (13%) | 4/32 (12%) | 20/161 (12%) |
Gestation at delivery, n/N (%) | |||
Early PTB, <34+0 weeks | na | 18/34 (53%) | 18/161 (11%) |
Late PTB, 34+0 to <37+0 weeks | na | 16/34 (47%) | 16/161 (10%) |
Term, ≥37+0 weeks | 127/127 (100%) | na | 127/161 (79%) |