Table 1

Maternal characteristics

CharacteristicPre-interventionPost-interventionP value
(n=4912)(n=8747)
Race and ethnicity 0.024
Non-Hispanic white1773 (36)2931 (34)
Non-Hispanic black940 (19)1789 (20)
Hispanic1804 (37)3332 (38)
Non-Hispanic Asian365 (7)648 (7)
Other30 (1)47 (1)
Age at delivery (years)0.867
<1856 (1)97 (1)
18–251129 (23)2032 (23)
26–352915 (59)5219 (60)
>35812 (17)1399 (16)
Insurance 0.013
Medicaid1872 (38)3559 (41)
Commercial2906 (59)4992 (57)
International or other84 (2)126 (1)
Self-pay50 (1)70 (1)
BMI at delivery (kg/m2 )0.122
<18.51 (0)4 (0)
18.5–25425 (9)673 (8)
25–301417 (29)2378 (27)
30–351256 (26)2065 (24)
35–40717 (15)1246 (14)
>40496 (10)898 (10)
Missing600 (12)1483 (17)
Nulliparous on admission 2048 (42)3592 (41)0.472
Gestational age at delivery (median (IQR))39 (37.7, 39.9)39 (37.6, 39.7)0.585
Prior caesarean birth 1071 (22)1918 (22)0.867
Multiple gestation 153 (3)210 (2)0.013
  • BMI, body mass index.