. Author manuscript; available in PMC: 2019 Jan 1.

Published in final edited form as: Am J Perinatol. 2017 Aug 14;35(1):78–83. doi: 10.1055/s-0037-1606119

Table 1.

Subject demographics

Variable	Duke N = 402	Pithagore6 N = 6,907	p-Value
Age, y^a	27.0 ± 6.6	29.9 ± 5.2	<0.0001
Race/ethnicity, n (%)		Not available
White	129 (32.1)
Black	149 (37.1)
Hispanic	95 (23.6)
Asian/Pacific Islander	22 (5.5)
Other	2 (0.5)
Missing	5 (1.2)
BMI, kg/m²^a,^b	33.0 ± 7.2	27.9 ± 4.4	<0.0001
Gestational age at delivery, wk^a	38.8 ± 2.4	39.8 ± 1.6	<0.0001
Induced labor, n (%)	306 (76.1)	2,115 (30.6)	<0.0001
Mode of delivery, n (%)
Vaginal	288 (71.6)	6062 (87.8)	<0.0001
Cesarean	114 (28.4)	845 (12.2)
Birthweight, g^a	3,196 ± 627	3,389 ± 374	<0.0001

Abbreviation: BMI, body mass index.

Mean ± standard deviation.

BMI at delivery.