Table 3.
Means (and standard deviations) and within-group effect sizes for each outcome variable for subgroups of participants that had or had not stopped drinking for more than one day before enrollment.
| Variable and group | Baseline, mean (SD) | 3-month follow-up, mean (SD) |
6-month follow-up, mean (SD) | Improvement from baseline to average follow-up, mean |
Within group effect size da | |
| Percent days abstinent | ||||||
|
|
Break (n=87) |
51.28 (26.57) |
84.65 (21.84) |
80.15 (25.39) |
31.12 | 1.26 |
|
|
No break (n=44) |
25.53 (25.90) |
47.63 (33.09) |
48.99 (35.90) |
22.78 | 0.71 |
| Standard drinks per drinking dayb | ||||||
|
|
Break (n=87) |
8.41 (4.81) |
3.80 (4.21) |
4.25 (5.32) |
4.39 | 0.91 |
|
|
No break (n=45) |
6.87 (3.73) |
5.99 (3.84) |
5.26 (4.47) |
1.25 | 0.31 |
| Inventory of Drug Use Consequences recent scorec | ||||||
|
|
Break (n=87) |
40.71 (18.73) |
14.37 (14.37) |
16.07 (18.06) |
25.49 | 1.49 |
|
|
No break (n=45) |
39.24 (18.02) |
29.60 (21.45) |
26.84 (25.27) |
11.02 | 0.51 |
aCohen d for change from baseline to average of 3-month and 6-month follow-ups .
bStandard drink is equal to 12 oz (355 mL) of 5% beer, 5 oz (149 mL) of 12% wine, or 1.5 oz (44 mL) of 80 proof liquor.
cAlcohol-related problems.