TABLE 1.

Study Population Demographics (N = 8285)

Demographic%
Male51
Race
 Black51
 White46
 Other3
<37 weeks’ gestation24
Mothers who completed high school59
Household income <$20 00050
Ever breastfed40
Cigarette smoker in home27
Enrolled in child care27
Multivitamin supplementation
 Before 3 mo of age32
 Before 6 mo of age41
 At 3 y of age42