Table 3.
Intervention effects of alcohol use at 1-, 3-, and 6-month follow-ups by condition (intervention vs control): linear regression analyses unadjusted and adjusted for the outcome measures at baseline assessment (N=907).
| Intervention effects at follow-up intervals | Group, mean (SD) | Beta (SE) | Cohen’s d | P | ||
|
|
Intervention (n=456) | Control (n=451) |
|
|
|
|
| Weekly alcohol consumption: unadjusted |
|
|
|
|
|
|
|
|
Baseline (4 pretests) | 22.2 (12.9) | 22.1 (13.8) |
|
|
|
|
|
1 month (posttests 1-4) | 24.0 (15.0) | 26.5 (17.4) | –2.44 (1.09) | 0.20 | .03 |
|
|
3 months (posttests 1-12) | 23.1 (13.2) | 24.9 (14.7) | –1.66 (0.94) | 0.13 | .08 |
|
|
6 months (posttests 1-25) | 22.9 (13.0) | 24.0 (13.7) | –1.11 (0.89) | 0.09 | .21 |
| Weekly alcohol consumption: adjusted |
|
|
|
|
|
|
|
|
Baseline (4 pretests) | 22.2 (12.9) | 22.1 (13.8) |
|
|
|
|
|
1 month (posttests 1-4) | 24.0 (15.0) | 26.5 (17.4) | –2.56 (0.74) | 0.20 | .001 |
|
|
3 months (posttests 1-12) | 23.1 (13.2) | 24.9 (14.7) | –1.76 (0.60) | 0.13 | .003 |
|
|
6 months (posttests 1-25) | 22.9 (13.0) | 24.0 (13.7) | –1.21 (0.58) | 0.09 | .04 |
| Binge drinking: unadjusted |
|
|
|
|
|
|
|
|
Baseline (4 pretests) | 1.8 (1.0) | 1.7 (1.1) |
|
|
|
|
|
1 month (posttests 1-4) | 1.9 (1.1) | 2.0 (1.1) | –0.13 (0.08) | 0.16 | .08 |
|
|
3 months (posttests 1-12) | 1.8 (0.9) | 1.9 (1.0) | –0.10 (0.06) | 0.09 | .12 |
|
|
6 months (posttests 1-25) | 1.8 (0.9) | 1.8 (0.9) | –0.07 (0.25) | 0.03 | .25 |
| Binge drinking: adjusted |
|
|
|
|
|
|
|
|
Baseline (4 pretests) | 1.8 (1.0) | 1.7 (1.1) |
|
|
|
|
|
1 month (posttests 1-4) | 1.9 (1.1) | 2.0 (1.1) | –0.15 (0.06) | 0.16 | .01 |
|
|
3 months (posttests 1-12) | 1.8 (0.9) | 1.9 (1.0) | –0.12 (0.05) | 0.09 | .01 |
|
|
6 months (posttests 1-25) | 1.8 (0.9) | 1.8 (0.9) | –0.09 (0.05) | 0.03 | .045 |