Table 1. Descriptive Statistics for Predictor Variables.
Variable | Mean | S.D. | Range | Frequency |
---|---|---|---|---|
Substance Use at 17.5 by SU Group | ||||
| ||||
Alcohol Use (Past 6 months) | ||||
Abstainers (n = 18) | 0 | 0 | 0 | |
Experimenters (n = 58) | 1.02 | 2.83 | 0-20 | |
At-risk (n = 58) | 4.16 | 6.64 | 0-38 | |
Abusers (n = 25) | 16.67 | 29.25 | 0-124 | |
Marijuana Use (Past 6 months) | ||||
Abstainers | 0 | 0 | 0 | |
Experimenters | .48 | 2.67 | 0-20 | |
At-risk | 6.29 | 18.59 | 0-100 | |
Abusers | 66.50 | 75.04 | 0-224 | |
Other Drug Use (Past 6 months) | ||||
Abstainers | 0 | 0 | 0 | |
Experimenters | 0 | 0 | 0 | |
At-risk | .36 | 2.04 | 0-15 | |
Abusers | 2.00 | 5.47 | 0-25 | |
| ||||
Control Variables | ||||
| ||||
Gender | Male = 79 Female = 80 |
|||
I.Q. | 104.30 | 15.37 | 56-142 | |
Externalizing Behaviors at 16 years | 55.46 | 9.07 | 40-80 | |
Internalizing Behaviors at 16 years | 53.67 | 8.24 | 38-76 | |
Peer Competence at 16 years | 51.90 | 25.82 | 3.33-100 | |
Parental Monitoring | 1.99 | .55 | 1-3 | |
Current Substance Use at 26 | ||||
Abstainers | 1.28 | .9 | 0-3 | |
Experimenters | 1.50 | 1.06 | 0-4 | |
At-risk | 1.84 | 1.34 | 0-5 | |
Abusers | 2.56 | 1.45 | 0-6 |