Table 1.

Distribution of covariates of cases and controls

CovariatesCases (n = 240)Controls (n = 255)P
Maternal factors
    Age, mean (SD)29 (5.54)30 (5.58)0.06
    Education (%)
        Less than college43.938.80.25
        College or more56.161.2
    Race (%)
        White79.585.50.003
        Black2.15.5
        Hispanic10.53.5
        Other8.05.5
    Household income (%)
        ≤$30,00036.931.90.03
        $30,000-75,00048.744.1
        >$75,00014.424.0
    Smoke (%)25.128.60.38
    Drink (%)65.669.40.36
    Morning sickness (%)70.462.80.07
Infant factors
    Male (%)52.147.50.30
    Birth weight (g), mean (SD)3,537 (539)3,447 (586)0.08