Table 1 Relative Rates of Past Six-Month Substance Use and Individual-Level Risk Factors
| Â | Hispanic | Caucasian | African-American | American Indian/Alaska Native | Test for Difference |
|---|---|---|---|---|---|
Alcohol Quantity and Frequency (Abbrev. RAPI) | .20a (.77) | .34a (.78) | -.07b (.81) | .19ab (.69) | F(3,430) = 4.19, p < .01 |
Tobacco | Â | Â | Â | Â | Â |
   Age at first use | 13.00a (2.38) | 12.15b (2.79) | 13.21a (2.57) | 12.68ab (2.11) | F(3,418) = 3.21, p < .05 |
   Number of cigarettes per day* | 3.89a (2.33) | 5.11b (2.31) | 4.16a (2.33) | 4.58ab (2.59) | F(3,426) = 6.00, p < .001 |
Marijuana | Â | Â | Â | Â | Â |
   Age at first use | 11.39a (2.44) | 11.49ab (2.37) | 12.23b (2.19) | 11.69ab (2.27) | F(3,548) = 3.93, p < .01 |
   Frequency of marijuana use** | 5.79 (2.66) | 6.23 (2.71) | 5.69 (2.77) | 5.54 (2.93) | F(3,388) = .85, p = .47 |
Hard Drug Composite | Â | Â | Â | Â | Â |
   Number of hard drugs used | .61a (1.26) | 1.05b (1.49) | .20c (.58) | .69ab (1.38) | F(3,633) = 11.31, p < .001 |
In School (% yes) | 79.3% a | 72.2% b | 92.4% c | 76.5% b | χ²(3, n = 649) = 21.38, p < .001 |
Working (% yes) | 20.9% | 20.4% | 18.8% | 22.0% | χ²(3, n = 651) = .46, p = .93 |
Self esteem | 3.32 ab (.50) | 3.24 b (.56) | 3.43a (.45) | 3.32 ab (.50) | F(3,647) = 3.62, p = .01 |
Reliability by group (α) | .72 | .83 | .71 | .79 |  |
Externalizing behavior | 1.59 a (.29) | 1.72 b (.29) | 1.60a (.31) | 1.75 b (.31) | F(3,647) = 9.85, p < .001 |
Reliability by group (α) | .88 | .87 | .88 | .88 |  |