TABLE 1

Demographic and Clinical Characteristics of Included Newborns by Type of Delivery

Vaginal, N = 108 745Cesarean, N = 35 144
Birth weight, g
 Mean (SD)3415 (443)3495 (496)
 2000–2999, N (%)18 508 (17.0)5412 (15.4)
 3000–3999, N (%)79 651 (73.2)24 235 (69.0)
 4000–4999, N (%)10 586 (9.7)5497 (15.6)
Gestational age, wk
 Median (interquartile range)39 (38–40)39 (38–40)
 36–38, N (%)30 361 (27.9)9212 (26.2)
 39–40, N (%)66 085 (60.8)21 739 (61.9)
 41–43, N (%)12 299 (11.3)4193 (11.9)
Maternal race or ethnicity, N (%)
 Hispanic27 551 (25.3)8619 (24.5)
 American Indian or Eskimo444 (0.4)144 (0.4)
 Asian26 436 (24.3)8734 (24.9)
 Black, non-Hispanic7368 (6.8)2830 (8.1)
 White, non-Hispanic44 056 (40.5)13 832 (39.4)
 Other or unknown2890 (2.7)985 (2.8)
Newborn hospital stay in days, median (interquartile range)1.5 (1.2–2.0)2.6 (2.1–3.1)
Weights recorded per child, median (interquartile range)
 Totala5 (4–6)6 (5–7)
 Birth hospital1 (1–2)2 (2–3)
 Outpatient3 (2–4)2 (2–3)
  • a Subsequent inpatient data not presented because only 4% and 2% were readmitted for any reason after vaginal and cesarean delivery, respectively.