Table 1.

Socio-demographic and clinical characteristics of assessed women and their infants in the ELGAN cohort (N=805)

	n	%
Maternal characteristics
Maternal age
Mean (SD), years	29.2 (6.72)	--
Race
White	510 / 804	63.4
Black	206 / 804	25.6
Other	88 / 804	10.9
Latina ethnicity	75/802	9.3
Pre-pregnancy body mass index, kg/m2
Mean (SD)	25.5 (6.88)	--
Normal or below	402 / 777	59.5
Overweight	143 / 777	18.4
Obese	171 / 777	22.0
Multifetal gestation	282 / 805	35.0
Education, years
≤12	314 / 780	40.2
13 or more	466 / 780	59.7
Single marital status	322 / 804	40.0
Public insurance	287 / 805	35.6
Tobacco use during pregnancy	109 / 787	13.8
Mode of delivery, cesarean	539 / 805	66.9
Duration of labor, mean (SD), hours	87.8 (201.97)	--
Duration of rupture of membranes, hours
<12	587 / 805	72.9
12–24	33 / 805	4.1
>24	185 / 805	22.9
Newborn characteristics
Infant sex, female	383 / 794	48.2
5 minute Apgar score <7	222 / 803	27.6
Gestational age at birth, weeks
Mean (SD)	25.6 (1.24)	--
23–24	171 / 794	21.5
25–26	360 / 794	45.3
27–28	263 / 794	33.1
Birthweight, mean (SD), grams	833.1 (196.61)	--
NICU length of stay, mean (SD), days	78.4 (47.24)	--
Chorioamnionitis characteristics
Chorioamnionitis diagnosis on delivery discharge	153 / 805	19.0
Chorioamnionitis diagnosis as maternal fever >101.4F and/or WBC >20,000 cells/mm3	190 / 776	24.4
Intrapartum antibiotic receipt	522 / 805	64.8
Maternal fever >101.4F	44 / 778	5.6
Maternal WBC >20,000 cells/mm3	162 / 795	20.3

Missing: race (n=1), ethnicity (n=3), body mass index (n=28), education (n=25), tobacco (n=18), sex (n=11), Apgar score (n=2), fever (n=27)

Abbreviations: WBC (white blood cell count), SD (standard deviation)