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. Author manuscript; available in PMC: 2017 Sep 1.
Published in final edited form as: Am J Addict. 2016 Jul 21;25(6):472–477. doi: 10.1111/ajad.12414

Figure 1. Percent Positive Urine Drug Screens by Dropout Status.

Figure 1

* Results are statistically significant at p <.05.

Note: % Positive for opioids for a given month represents percent of subjects with at least one urine positive for opioids. % Positive for other drugs for a given month represents percent of subjects with at least one urine positive for cocaine, cannabis or non-prescribed benzodiazepine or amphetamine. Percentages reported in the table do not include missing urine drug screens.