Characteristics of stillbirth and live birth pregnancies.

aInformation was missing as follows (unweighted missing n for stillbirths and live births, respectively): paternal age (44 and 98), maternal race/ethnicity (1 stillbirth), BMI (21 and 42), maternal education (36 and 82), marital status (34 and 76), insurance (3 and 4), family income (40 and 90), blood type (5 and 6), Rh factor (2 and 6), cigarette smoking (34 and 78), alcohol consumption (37 and 81), drug use (38 and 91), hypertension (2 and 5), diabetes (1 and 5), seizure disorder (2 and 6), male sex (5 and 2).Percentages may not sum to 100 because of rounding.bp-Value for a difference between stillbirths and live births by the median test (continuous variables) or the Wald chi-square test (categorical variables).cAnalysis weights that accounted for the basic study design plus other aspects of the sampling were used.Unweighted sample sizes were 527 stillbirths and 1,821 live births.dAverage number of cigarettes smoked per day during the 3 mo prior to pregnancy or alcohol consumption during the 3 mo prior to pregnancy.Drank without bingeing was defined as 0–6 drinks in a typical week and no occasion where four or more drinks were consumed in a single time period (“binge”). Bingeing was defined as at least one binge and/or seven or more drinks in a typical week.eGA at death (stillbirths) or delivery (live births) by the SCRN algorithm [17].HMO, health maintenance organization; VA, Veterans Affairs.