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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 3. Comparison 1: Contingency management + standard maintenance versus standard maintenance alone: percentage drug-negative specimens.

Study Outcome Experimental group Control group Statistic Notes
Neufeld 2008 P ercentage opioid-negative specimens; at 6 months 80.5% 73.7% OR 1.31 (95% CI 0.71 to 2.42; P = 0.393) Favours neither condition
Neufeld 2008 Percentage cocaine-negative specimens; at 6 months 77.3% 66.7% OR 1.59 (95% CI 0.86 to 2.96; P = 0.139) Favours neither condition
Neufeld 2008 Percentage sedative-negative specimens; at 6 months 96.2% 90.8% OR 1.82 (95% CI 0. 715 to 4.42; P = 0.184) Favours neither condition
Neufeld 2008 Percentage (any) drug-negative specimens; at 6 months 68.7% 54.2% OR 1.70 (95% CI 0.94 to 3.07; P = 0.081) Favours neither condition

Statistics provided by trial investigators; data relate to proportion of specimens that are negative, rather than proportion of participants who provided negative specimens.