Table 3.
Modeling changes in substance use and negative consequences baseline to three and 12-months post recruitment
| Measure | Effect | DF | Statistic |
|---|---|---|---|
| Days alcohol use in past | Group | 1, 397 | F=6.12; p = .01 |
| 30 days (AMD)* | Time | 2,798 | F = 27.37; p < .001 |
| Group*Time | 2,798 | F = 2.67; p = .07 | |
| Days THC use in past 30 | Group | 1, 397 | F=0.12; p = .73 |
| days (AMD)* | Time | 2,798 | F = 13.36; p < .001 |
| Group*Time | 2,798 | F = 0.18; p = .83 | |
| Days conjoint alcohol and | Group | 1, 331 | F=7.77; p = .01 |
| THC use in past 30 days | Time | 2,662 | F = 10.77; p < .001 |
| (AMD)* | Group*Time | 2,662 | F = 3.78; p = .02 |
| Days alcohol binge in | Group | 1, 397 | F=6.33; p = .01 |
| past 30 days (AMD)* | Time | 2,798 | F = 9.91; p < .001 |
| Group*Time | 2,798 | F = 3.07; p = .05 | |
| Days THC heavy use in | Group | 1, 257 | F=0.01; p = .93 |
| past 30 days (AMD)* | Time | 2,514 | F = 9.48; p < .001 |
| Group*Time | 2,514 | F = 1.21; p = .30 | |
| Total negative | Group | 1,348 | F=0.70; p = .40 |
| consequences (NIP)* | Time | 2,696 | F = 39.99; p < .001 |
| Group*Time | 2,698 | F = 0.14; p = .86 | |
| Alcohol negative | Group | 1,348 | F=2.18; p = .14 |
| consequences (NIP)* | Time | 2,696 | F = 32.82; p < .001 |
| Group*Time | 2,698 | F = 0.25; p = .77 | |
| THC negative | Group | 1,348 | F=0.24; p = .62 |
| consequences (NIP)* | Time | 2,696 | F = 28.67; p < .001 |
| Group*Time | 2,698 | F = 0.49; p = .61 |
*
square root transformation