Table 2: Self-reported drug use during pregnancy among women giving birth to infants with or without prenatal cocaine exposure in the Miami Prenatal Cocaine Study.

Drug Mothers of non-cocaine-exposed infants (n = 223)Mothers of cocaine-exposed infants (n = 253)
Total drug exposure, median (min to max)*% Using (n)Total drug exposure, median (min to max)*% Using (n)

Alcohol (number of drinks)54 (2 to 1680)30.9 (69)96 (1 to 5226)66.8 (169)
Tobacco (number of cigarettes)†‡854 (1 to 5880)17.0 (38)2184 (1 to 8820)73.5 (186)
Marijuana (number of joints)28 (1 to 807)11.7 (26)24 (1 to 1320)45.1 (114)
Cocaine/crack (number of lines/rocks)134 (1 to 19600)68.4 (173)

*Median values based only on mothers reporting use, calculated using total exposure composites: (number of weeks used) × (usual number of days per week) × (usual dose per day).
P < 0.01, between-group comparisons of percentage of maternal drug use (columns 2 and 4).
P < 0.05, between-group comparisons of median maternal drug use (columns 1 and 3).