Table 3.

Estimated substance use profile prevalence at each age by race

Substance use profile prevalence at each age
Black girls	No Use	Alcohol use	Polydrug use
Age 13	.77	.19	.04
Age 14	.66	.25	.09
Age 15	.53	.34	.13
Age 16	.48	.33	.18
Age 17	.41	.40	.18

White girls	No Use	Alcohol use	Polydrug use
Age 13	.76	.18	.05
Age 14	.61	.25	.14
Age 15	.56	.22	.22
Age 16	.46	.28	.26
Age 17	.38	.32	.29

Note: Black subsample n=611; White subsample n=465.

The “Poludrug use” class generally represents some combination (i.e., 2 or more) of alcohol, cigarettes, and marijuana use in the past year.