Comparisons of mortality rate by demographic and drug use history on enrollment and MMT treatment characteristics of clients.

*Average methadone dose is calculated as the sum of all methadone doses divided by the number of days methadone was received. **Only HIV-positive clients are included in the category “Antiretroviral therapy (ART).” †Urine tests positive for opiates during treatment is calculated by the total number of routine urine drug tests that yielded positive results as a percentage of the total number of tests taken during the six years of follow-up.