Table 1: Characteristics of infants with and without prenatal cocaine exposure and their mothers at enrollment in the Miami Prenatal Cocaine Study.

CharacteristicNon-cocaine-exposed infants
Cocaine-exposed infants
(n = 223)(n = 253)

Maternal characteristics
 Maternal age, mean (SD), y*23.8 (5.4)28.7 (4.8)
 Education, mean (SD), y11.3 (1.4)11.2 (1.5)
 Unemployed, %*8295
 Never married, %8990
 Primigravida, %*236
 Prenatal care ≥ 4 visits, %*8368
Infant characteristics
 Birth weight, mean (SD), g*3303 (504)2971 (474)
 Birth length, mean (SD), cm*50.7 (2.3)48.9 (2.5)
 Birth head circumference, mean (SD), cm*33.8 (1.5)33.0 (1.6)
 Gestational age, mean (SD), weeks*39.7 (1.4)39.4 (1.4)
 Male, %5048

* P < 0.01.