Table 4.
Multilevel Models Predicting Frequency of Stimulant Use in Past Month to “Get High”.
| Parameter | b | SE | t | p | 95% CI | |
|---|---|---|---|---|---|---|
| Intercept | 1.40 | 0.30 | 4.63 | < .001 | (0.76, | 2.04) |
| Age | − 0.02 | 0.07 | − 0.28 | .780 | (− 0.16, | 0.12) |
| Peer Modeling | 0.09 | 0.02 | 4.45 | < .001 | (0.05, | 0.13) |
| Parental Monitoring (Linear) | 0.02 | 0.03 | 0.82 | .414 | (− 0.03, | 0.08) |
| Parental Monitoring (Quadratic) | 0.01 | 0.00 | 2.09 | .039 | (0.00, | 0.01) |
| School Performance | − 0.06 | 0.07 | − 0.79 | .433 | (− 0.20, | 0.09) |
| Region | ||||||
| Northern Plains | − 0.59 | 0.29 | − 2.01 | .062 | (− 1.20, | 0.03) |
| Northwest | − 0.26 | 0.70 | − 0.37 | .715 | (− 1.76, | 1.24) |
| Southeast + Texas | − 0.74 | 0.86 | − 0.85 | .408 | (− 2.57, | 1.10) |
| Upper Great Lakes | − 0.24 | 0.29 | − 0.84 | .413 | (− 0.85, | 0.37) |
| Southwest | ||||||
| Female gender | 0.08 | 0.20 | 0.38 | .705 | (− 0.33, | 0.48) |
| Male gender | ||||||
| Prescribed by doctor | 0.58 | 0.21 | 2.81 | .006 | (0.17, | 0.99) |
| Not prescribed by doctor | ||||||
Note. CI = confidence interval. Continuous predictors were centered at the grand mean. Bolded typeface indicates fixed effects that were significant at the p < .05 level.