Table 2.
Motivational interviewing (MI) versus control group outcomes among adults in treatment with depression who report hazardous drinking or drug use (N=104).
| MI intervention |
Control |
χ2 | Effect size h |
|||
|---|---|---|---|---|---|---|
| N | % | n | % | |||
| Total study group | 52 | 52 | ||||
| Any 3+ drinking days | ||||||
| Baseline | 37 | 72.6 | 36 | 69.2 | 0.1 | - |
| 3months | 24 | 49.0 | 31 | 63.3 | 2.0 | .29 |
| 6months | 24 | 47.1 | 30 | 57.7 | 1.2 | .21 |
| Any cannabis use | ||||||
| Baseline | 10 | 19.2 | 20 | 38.5 | 4.7.* | - |
| 3months | 8 | 16.3 | 21 | 42.9 | 8.3.* | .61 |
| 6months | 11 | 21.6 | 19 | 36.5 | 2.8 | .23 |
| Mean | SD | Mean | SD | t (df) | Effect size d |
|
| BDI-II Depression score | ||||||
| Baseline | 24.8 | 9.6 | 24.6 | 11.3 | 0.1 (102) | - |
| 3months | 20.3 | 12.0 | 20.8 | 11.8 | 0.2 (96) | .04 |
| 6months | 17.4 | 11.4 | 18.3 | 12.4 | 0.4 (101) | .08 |
Notes: Baseline, 3- and 6-month questions refer to alcohol and drug consumption in the previous 30days. Significance of intervention and control group differences was tested using chi-square and t-tests. We report Cohen's (1988) h for proportions and d for means.
*
p<.05.