TABLE 1

Clinical Characteristics of Study Population

CDC2002, n = 920CDC2010, n = 476P Value
LB≥3672827004
Total evaluations (1000 LB≥36)920 (126)476 (68)<.001
Birth weight, g, mean (SD)3385 (450)3437 (444).04
GA, wk, mean (SD)39.6 (1.3)39.7 (1.3).22
Male, n (% of total evaluated)490 (53.3)242 (50.9).42
Multiple gestation, n (% of total evaluated)27 (2.9)12 (2.5).73
Epidural analgesia, n (% of total evaluated)746 (81.1)448 (94.1)<.001
Vaginal deliveries, n (% of total evaluated)678 (73.7)307 (64.5)<.001