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.* 美沙酮平均剂量的计算方式为：所有美沙酮给药剂量之和除以接受美沙酮治疗的总天数。 ** 仅HIV阳性服务对象可纳入「抗反转录病毒治疗（Antiretroviral Therapy, ART）」类别中。 † 治疗期间阿片类药物尿液检测阳性率的计算方式为：以6年随访期内常规尿液毒品检测的阳性总次数，占同期总检测次数的百分比计算得出。