Table 1.
Means, standard deviations, effect sizes, and significance tests of during-treatment change in process variables
| Process Variable | Intake Mean (SD) | Discharge Mean (SD) | % Change | Effect size d | Effect size interpretation | Est1 (se) | z |
|---|---|---|---|---|---|---|---|
| Distress | 63.4 (10.0) | 53.4 (8.7) | −16% | 1.09 | Large | −5.09 (.26) | −19.43** |
| Abstinence Motivation | 9.1 (1.8) | 9.4 (1.3) | 3% | 0.17 | Small | 1.09 (.04) | 2.39* |
| Abstinence Self-efficacy | 7.0 (2.5) | 8.4 (1.8) | 20% | 0.55 | Medium | 1.23 (.03) | 8.02** |
| Abstinence Coping | 42.4 (10.8) | 48.6 (9.0) | 15% | 0.66 | Medium–large | 3.13 (.28) | 11.00** |
| AA/NA Commitment | 21.8 (5.0) | 24.4 (4.1) | 12% | 0.66 | Medium–large | 1.30 (.12) | 10.45** |
1
Regression coefficient (distress, abstinence coping, and AA/NA commitment) or rate ratio (abstinence motivation and self-efficacy) indicating during-treatment change, controlling for age, race, education, baseline PDA
*
p<.05,
**
p<.01