Skip to main content

Psychology: Research and Review

Table 3 Attendance, retention, and crack cocaine abstinence outcomes by treatment condition

From: Contingency management is effective in promoting abstinence and retention in treatment among crack cocaine users with a previous history of poor treatment response: a crossover trial

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

  1. UC usual care, CM contingency management, SD standard deviation
  2. 1p values were obtained using paired t test for continuous variables and the McNemar exact test for dichotomous variables