Table 4.
Discriminant validity testing of substance involvement scores using Youth Self Report criterion questions
| Youth Self Report Responsea |
||||
|---|---|---|---|---|
| Not true | Somewhat true | Very true | ||
| ASSIST score mean (SD) | K-W χ2b | |||
| Tobacco (n=108)c | 20.1 (16.9) | 24.0 (18.9) | 29.4 (17.8) | 4.9 |
| Alcohol (n=157)d | 8.6 (9.5) | 16.0 (10.3) | 21.8 (8.6) | 38.3* |
| Inhalants (n=118) | 11.2 (9.2) | 21.5 (8.6) | 16.8 (12.5) | 14.6* |
| Cannabis (n=96) | 12.8 (10.6) | 22.6 (10.7) | 20 (13.6) | 12.1* |
| Cocaine (n=77) | 10.0 (9.9) | 20.5 (7.5) | 19.2 (11.7) | 15.7* |
| Amphetamines (n=63) | 9.6 (9.7) | 18.1 (10.8) | 18.2 (10.4) | 10.1* |
| Sedatives (n=56) | 11.5 (10.6) | 18.1 (10.3) | 17.4 (13.0) | 3.7 |
| Hallucinogens (n=69) | 9.9 (9.7) | 19.7 (9.7) | 18.2 (11.4) | 12.2* |
| Other substance (n=87) | 9.6 (9.4) | 19.9 (9.4) | 17.7 (10.8) | 15.9* |
| Total substance involvement (n=502) | 12.2 (33.9) | 39.8 (54.2) | 76.7 (87.7) | 95.4* |
*
P<.05
a
Youth Self Report criterion question for all substances except tobacco and alcohol: In the past 4 weeks, I have used drugs for nonmedical purposes
b
Kruskal-Wallis test of one-way analysis of ranks for non-normal data.
c
Tobacco Youth Self Report criterion question: In the past 4 weeks, I have smoked tobacco
d
Alcohol: Youth Self Report criterion question: In the past 4 weeks, I drank alcohol without my parent's permission