Table 1.

Characteristics of the Study Population by Glucose Challenge Test Categories.

Characteristic	Glucose Challenge Test Categories
	Less than 120 mg/dL (n=436)	135–139 mg/dL (n=135)	140–199 mg/dL (n=1,268)	P
Age, y	24 [21–29]	28 [24–32]	28 [24–32]	<0.001
Primiparous	162(37.2%)	39(28.9%)	425(33.5%)	0.162
Race or ethnic group				<0.001
Black	56(12.8%)	27(20.0%)	142(11.2%)
White	118(27.1%)	46(34.1%)	319(25.2%)
Hispanic	255(58.5%)	58(43.0%)	750(59.2%)
Other	7(1.6%)	4(3.0%)	57(4.5%)
Smoking	34(7.8%)	20(14.8%)	95(7.5%)	0.012
Alcohol use	13(3.0%)	6(4.4%)	43(3.4%)	0.711
Body mass index at entry, kg/m2	29.1 [26.1–32.5]	29.5 [ 26.3–33.3]	29.7 [26.7–32.8]	0.215
Glucose level after 50-g glucose challenge test, mg/dL	100 [86–109]	137 [136–138]	154 [145–165]	<0.001
Duration of gestation at enrollment, wk	29.6 [28.3–30.4]	29 [28–29.7]	28.7 [27.6–30.0]	<0.001

Data are n (%) or median [interquartile range] unless otherwise specified.