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Comparison 4 Contingency management versus standard care, Outcome 4 Substance use: 2. Number of continuous days alcohol negative urine tests, 3 months (skewed data).
| Substance use: 2. Number of continuous days alcohol negative urine tests, 3 months (skewed data) | ||||
|---|---|---|---|---|
| Study | Intervention | Mean | SD | N |
| McDonell 2017 | Treatment | 8.56 | 12.59 | 40 |
| McDonell 2017 | Control | 4.11 | 1.22 | 39 |
