Treatment retention for people with heroin dependence receiving ambulatory treatment with buprenorphine or symptomatic medications

RetentionBuprenorphine % (n=56)Symptomatic drugs % (n=58)Number needed to treat to benefit 1 with buprenorphine (95% CI)Relative risk reduction (95% CI)
At 8 days86573 (2 to 7)51 (14 to 88)
At 35 days62394 (2 to 19)59 (0 to 120)