TABLE 1

Demographic and Clinical Characteristics of Included Newborns, by Type of Delivery

Vaginal (n = 83 433)Cesarean (n = 25 474)
Birth wt (g)
 Mean (SD)3416.9 (426.2)3487.7 (462.6)
 Median34023470
 Interquartile range(3120–3700)(3170–3790)
 Range(2000–5000)(2010–5000)
Gestational age (wk), n (%)
 361429 (1.7)458 (1.8)
 375817 (7.0)1707 (6.7)
 3815114 (18.1)3830 (15.0)
 3927335 (32.8)11515 (45.2)
 4024011 (28.8)4743 (18.6)
 419375 (11.2)3041 (11.9)
 42352 (0.4)175 (0.7)
 430 (0.0)5 (<0.1)
Gestational age (wk)
 Mean (SD)39.2 (1.2)39.1 (1.1)
 Median3939
 Interquartile range(38–40)(39–40)
 Range(36–42)(36–43)
Maternal race/ethnicity, n (%)
 Hispanic20234 (24.5)5897 (23.1)
 American Indian/Eskimo335 (0.4)104 (0.4)
 Asian19765 (23.7)6079 (23.9)
 Black, non-Hispanic5165 (6.2)1898 (7.5)
 White, non-Hispanic35704 (42.8)10772 (42.3)
 Unknown2230 (2.7)724 (2.8)
Newborn hospital length of stay (d)a
 Mean (SD)1.7 (0.8)2.8 (0.9)
 Median1.62.6
 Interquartile range(1.2–2.0)(2.1–3.2)
  • a There were missing length of stay data for 210 vaginally delivered and 87 Cesarean-delivered newborns.