Table 3.
Attendance, retention, and crack cocaine abstinence outcomes by treatment condition
| Variable | During UC intervention (n = 16) | During to CM intervention (n = 16) | t/OR | p value1 | ||
|---|---|---|---|---|---|---|
| n (%) | Mean ± SD | n (%) | Mean ± SD | |||
| Treatment attendance (sessions) | 5.3 ± 7.9 | 19.9 ± 15.4 | 4.02 | 0.001 | ||
| Retention in treatment (weeks) | 3.9 ± 4.2 | 9.5 ± 3.3 | 4.89 | 0.001 | ||
| Proportion of negative samples submitted | 12.2 ± 19.9 | 45.3 ± 40.9 | 3.21 | 0.005 | ||
| Longest duration of abstinence (weeks) | 3.4 ± 6.4 | 12.6 ± 14.7 | 2.29 | 0.047 | ||
| Retained and abstinent at the last week of treatment | 0 (0) | 7 (43.5) | – | 0.016 | ||
| 3 or more weeks of abstinence | 2 (12.5) | 7 (43.5) | 6 | 0.125 | ||
| Completely abstinent during treatment | 0 (0) | 4 (25) | – | 0.125 | ||
UC usual care, CM contingency management, SD standard deviation
1p values were obtained using paired t test for continuous variables and the McNemar exact test for dichotomous variables