Table 2.
Means (and standard deviations) and within-group effect sizes for each outcome variable for each treatment condition.
| 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 |
Improvement from 3 to 6 months, mean |
Within group effect size da | |
| Percent days abstinent | |||||||
|
|
OAa+SRb
(n=73) |
42.13 (29.01) |
74.03 (30.65) |
67.28 (33.64) |
28.53 | −6.75 | 0.98 |
|
|
SR only (n=58) |
43.26 (29.11) |
69.92 (32.43) |
72.72 (31.57) |
28.06 | 2.80 | 0.97 |
| Mean standard drinks per drinking dayd | |||||||
|
|
OA+SR (n=73) |
7.64 (4.45) |
4.33 (3.70) |
5.08 (5.20) |
2.56 | −0.75 | 0.65 |
|
|
SR only (n=59) |
8.19 (4.61) |
4.82 (4.77) |
3.99 (4.84) |
4.20 | 0.83 | 0.84 |
| Inventory of Drug Use Consequences recent scoree | |||||||
|
|
OA+SR (n=73) |
39.37 (17.43) |
19.01 (17.78) |
19.88 (21.52) |
19.92 | −0.87 | 1.08 |
|
|
SR only (n=58) |
41.25 (19.72) |
20.24 (19.50) |
19.58 (21.27) |
21.01 | 0.66 | 1.14 |
aCohen d for change from baseline to average of 3-month and 6-month follow-ups .
bOA: Overcoming Addictions.
bSR: SMART Recovery.
dStandard 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.
eAlcohol-related problems.