Table 3.
Alcohol consumption and alcohol problem outcomes in intervention and booster conditions at 3- and 12-month follow up
| Measure | BMI (N = 112) M (SD) | CDI (N = 113) M (SD) | BST (N = 116) M (SD) | No BST (N = 109) M (SD) | df | F (Time) | F (Interv. x Time) | F (BST x Time) |
|---|---|---|---|---|---|---|---|---|
| No. drinking days | ||||||||
| Baseline | 5.23 (4.82) | 6.05 (5.14) | 5.60 (5.27) | 5.69 (4.70) | ||||
| 3 mo. follow up | 4.74 (3.83) | 4.75 (4.37) | 4.75 (4.37) | 4.65 (3.99) | 1,205 | 5.42* | 1.34 | 0.19 |
| 12 mo. follow up | 6.37 (4.67) | 5.89 (4.01) | 5.89 (4.01) | 6.05 (4.18) | 1,207 | 4.23* | 4.67* | 0.73 |
| No. heavy drinking days | ||||||||
| Baseline | 2.77 (3.55) | 3.17 (4.05) | 3.05 (4.05) | 2.88 (3.55) | ||||
| 3 mo. follow up | 2.41 (2.84) | 2.08 (2.61) | 2.56 (3.26) | 1.89 (1.94) | 1,205 | 10.26** | 2.67 | 1.14 |
| 12 mo. follow up | 3.21 (3.91) | 2.95 (3.56) | 3.24 (4.02) | 2.92 (3.43) | 1,207 | 0.38 | 1.67 | 0.63 |
| Ave. no. drinks per drinking day | ||||||||
| Baseline | 4.92 (2.53) | 4.45 (2.36) | 4.90 (2.87) | 4.45 (1.89) | ||||
| 3 mo. follow up | 4.77 (2.89) | 4.49 (2.41) | 4.87 (2.89) | 4.37 (2.39) | 1,173 | 1.56 | 0.58 | 0.24 |
| 12 mo. follow up | 4.64 (2.78) | 4.87 (2.86) | 4.84 (3.07) | 4.66 (2.53) | 1,185 | 0.64 | 4.52* | 1.26 |
| Ave. estimated BAC | ||||||||
| Baseline | .097 (.06) | .088 (.06) | .096 (.06) | .089 (.05) | ||||
| 3 mo. follow up | .085 (.06) | .092 (.06) | .095 (.06) | .091 (.06) | 1,143 | 0.35 | 3.20† | 0.18 |
| 12 mo. follow up | .083 (.05) | .089 (.06) | .091 (.06) | .085 (.06) | 1,154 | 0.98 | 3.40† | 0.67 |
|
| ||||||||
| F (Interv) | F (BST) | |||||||
|
| ||||||||
| Alcohol problems | ||||||||
| 3 mo. follow up | 3.42 (3.03) | 3.03 (2.58) | 3.37 (3.09) | 3.09 (2.52) | 1,194 | 0.17 | 0.61 | |
| 12 mo. follow up | 2.98 (2.59) | 3.17 (3.05) | 3.05 (3.01) | 3.11 (2.63) | 1,204 | 1.84 | 0.22 | |
|
| ||||||||
| N (%) | N(%) | N(%) | N(%) | χ2(Interv) | χ2(BST) | |||
|
| ||||||||
| Help seeking | ||||||||
| 3 mo. follow up | 10 (9.7%) | 3 (2.9%) | 8 (7.5%) | 5 (5.0%) | 1 | 4.09* | 0.59 | |
| 12 mo. follow up | 7 (6.6%) | 7 (6.7%) | 6 (5.7%) | 8 (7.6%) | 1 | 0.00 | 0.31 | |
Note. BMI = Brief Motivational Intervention; CDI = Computer-Delivered Intervention; BST = Booster; BAC = Blood Alcohol Concentration; YAAPST = Young Adult Alcohol Problems Screening Test. On the alcohol consumption measures three participants had missing data at baseline. N’s are slightly different between follow-ups and between measures, due to missing data on self-administered measures. The alcohol consumption measures reflect the past month; alcohol problems and help seeking reflect the past 3 months. Repeated measures analyses conducted with the consumption variables compared follow-up to baseline.
p<.08.
p<.05.
p < .01.
p < .001