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. Author manuscript; available in PMC: 2014 Sep 19.
Published in final edited form as: Cochrane Database Syst Rev. 2010 Jun 16;(6):CD007668. doi: 10.1002/14651858.CD007668.pub2

Table 6. Comparison 3: Contingency management + CBT + standard maintenance versus standard maintenance alone: cocaine abstinence (skewed data).

Study Outcome n(Exp) Mean(Exp) SD(Exp) n(Cntrl) Mean(Cntrl) SD(Cntrl) Statistic Notes
Messina 2003 Number cocaine-negative specimens; by 16 weeks (see note 1) 7 37.7 13.3 12 9.3 11.3 P < 0.05 (T wo-way ANOVA; Tukey-Kramer post-hoc test) Favours treatment

1. Outcome is mean number of cocaine-negative specimens per participant; n(Exp) and n(cntrl) are numbers reported as randomised to each condition.