Table 3.
| Variables | Model 1: STS vs. BI-Y + BI-YP | Model 2: STS vs. BI-Y | ||||
|---|---|---|---|---|---|---|
| Estimate | S.E. | Est./S.E. | Estimate | S.E. | Est./S.E. | |
|
| ||||||
| Baseline Marijuana Use$1 | 1.161 | 0.745 | 1.559 | 0.438 | 0.878 | 0.499 |
| Baseline Marijuana Use$2 | 1.937** | 0.758 | 2.554 | 1.277 | 0.890 | 1.434 |
| Baseline Marijuana Use$3 | 2.745*** | 0.767 | 3.581 | 2.159* | 0.900 | 2.398 |
| 3-Month Follow-Up Marijuana Use$1 | 2.418* | 1.159 | 2.087 | 1.915 | 1.376 | 1.392 |
| 3-Month Follow-Up Marijuana Use$2 | 2.797* | 1.165 | 2.401 | 2.320 | 1.384 | 1.677 |
| 3-Month Follow-Up Marijuana Use$3 | 3.050** | 1.165 | 2.618 | 2.545 | 1.384 | 1.839 |
| 6-Month Follow-Up Marijuana Use$1 | 6.242*** | 1.321 | 4.725 | 5.831*** | 1.570 | 3.715 |
| 6-Month Follow-Up Marijuana Use$2 | 6.674*** | 1.324 | 5.040 | 6.353*** | 1.576 | 4.031 |
| 6-Month Follow-Up Marijuana Use$3 | 7.012*** | 1.324 | 5.296 | 6.602*** | 1.574 | 4.195 |
| 12-Month Follow-Up Marijuana Use$1 | 5.059** | 1.596 | 3.170 | 5.394** | 1.843 | 2.926 |
| 12-Month Follow-Up Marijuana Use$2 | 5.434*** | 1.604 | 3.387 | 5.867** | 1.855 | 3.163 |
| 12-Month Follow-Up Marijuana Use$3 | 5.941*** | 1.619 | 3.670 | 6.303*** | 1.871 | 3.370 |
| 18-Month Follow-Up Marijuana Use$1 | 2.974* | 1.417 | 2.099 | 2.436 | 1.720 | 1.416 |
| 18-Month Follow-Up Marijuana Use$2 | 3.321* | 1.424 | 2.333 | 2.754 | 1.729 | 1.592 |
| 18-Month Follow-Up Marijuana Use$3 | 3.536* | 1.428 | 2.476 | 3.011 | 1.734 | 1.736 |
| R2 | Model 1 | Model 2 | ||
| Estimate | Scale Factors | Estimate | Scale Factors | |
|
| ||||
| Baseline | 0.073 | 1.000 | 0.060 | 1.000 |
| 3-Month Follow-Up Marijuana Use | 0.389 | 0.809 | 0.299 | 0.848 |
| 6-Month Follow-Up Marijuana Use | 0.604 | 0.685 | 0.569 | 0.704 |
| 12-Month Follow-Up Marijuana Use | 0.639 | 0.633 | 0.610 | 0.651 |
| 18-Month Follow-Up Marijuana Use | 0.478 | 0.750 | 0.531 | 0.766 |
Note. Two-tailed p-values:
*
p < .05;
**
p < .01;
***
p < .001