At the @-week follow-up , TLFB results on the @ that continued methadone or the @ on Suboxone showed less opioid ( @ vs. @ % ; p < @ ) , illicit buprenorphine ( @ vs. @ % ; p = @ ) , benzodiazepine ( @ vs. @ % ; p < @ ) , and marijuana ( @ vs. @ % ; p < @ ) use than the @ who did not continue opioid substitution therapy .