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. Author manuscript; available in PMC: 2010 Aug 1.
Published in final edited form as: Drug Alcohol Depend. 2009 May 14;103(3):148–154. doi: 10.1016/j.drugalcdep.2009.03.007

Table 2.

Number of Arrests during the 6-, 12-, and 24-Month Post-Treatment-Entry Periods: Interim Maintenance (n = 198) v. Control (n = 119)

Number of Arrests 6 Months Post-Treatment-Entry 12 Months Post-Treatment-Entry 24 Months Post-Treatment-Entry
Condition: IM Control IM Control IM Control
0 167 (84.3) 95 (79.8) 145 (73.2) 88 (73.9) 121 (61.1) 65 (54.6)
1 24 (12.1) 15 (12.6) 34 (17.2) 16 (13.4) 41 (2.7) 27 (22.7)
2 5 (2.5) 5 (4.2) 14 (7.1) 9 (7.6) 16 (8.1) 13 (10.9)
3 1 (0.5) 4 (3.4) 1 (0.5) 4 (3.4) 11 (5.6) 6 (5.0)
4 1 (0.5) 0 3 (1.5) 1 (0.8) 6 (3.0) 5 (4.2)
5 0 0 0 1 (0.8) 2 (1.0) 1 (0.8)
6 0 0 1 (0.5) 0 0 2 (1.7)
7 0 0 0 0 0 0
8 0 0 0 0 1 (0.5) 0
M (SE) .20 (.06) .34 (.09) .33 (.09) .39 (.11) .61 (.14) .76 (.18)

Cell entries are n (%) with the exception of the last row, which are model-derived exponentiated Means (M) and their Standard Errors (SE).

There were no Treatment Group differences for arrested (yes v. no) during the 6-, 12-, and 24-month post-treatment-entry periods, all ps > .18.

Mean number of arrests was significantly higher in the Control than in the Interim condition in the 6-month post-treatment-entry period, χ2(1) = 5.56, p < .02; this difference did not persist into the 12- and 24-month post-treatment-entry periods, both ps > .16.