Table 2.
Lifetime prevalence and age at initiation of alcohol, cigarette, and marijuana use by race
| Any use (%) |
Age at first use: M (SD) |
|||||
|---|---|---|---|---|---|---|
| Black girls | White girls | χ2(1) | Black girls | White girls | t(df) | |
| Alcohola,b | 52.8 | 67.7 | 48.62 | 14.08 (2.00) | 13.70 (1.98) | t(1282) = 3.42 |
| Cigarettesa | 26.2 | 34.7 | 18.16 | 14.53 (2.02) | 14.70 (1.75) | t(633.85) = 1.15 |
| Marijuanaa,b | 41.8 | 31.2 | 25.53 | 14.99 (1.58) | 15.33 (1.36) | t(682.73) = 3.24 |
M mean, SD standard deviation
a
Difference in prevalence significant at p < 0.05
b
Difference in age at first use significant at p < 0.05