Table 1 Patient and pregnancy characteristics.
Training cohort
(n = 18)
Validation cohort
(n = 10)
Demographics
Age (years, mean ± SD)31.9 ± 3.432.8 ± 5.1
Body mass index (kg/m2,
mean ± SD)
23.8 ± 6.526.3 ± 2.2
Gravity [median (interquartile
range)]
1.5 (1, 7)2 (1, 5)
Parity (% nulliparous)5030
Race (%)
  Caucasian15 (83)7 (70)
  Others (Asian, African, or
American Indian)
2 (11)3 (30)
  Unknown1 (6)0
Ethnicity (% Hispanic)3 (11)2 (20)
Married (%)14 (78)8 (80)
Level of education (%)
  ≤High school2 (11)1 (10)
  >High school16 (89)9 (90)
Current pregnancy parameters
Gestational age at delivery
(weeks, mean ± SD)
38.9 ± 1.439.5 ± 1.3
Mode of delivery (%)
  Spontaneous13 (72)5 (50)
  Cesarian section5 (18)5 (50)
Birth weight (kg, mean ± SD)3.2 ± 0.43.7 ± 0.4
Five-minute Apgar score [media
(range)]
9 (8–9)9 (8–9)