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Table 1 Patient demographics for a cross-section of 161 participants

From: The interaction between vaginal microbiota, cervical length, and vaginal progesterone treatment for preterm birth risk

  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%)
  1. PTB preterm birth, na not applicable
  2. *P < 0.05 Fisher’s exact term vs. preterm birth groups