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Table 4 Routes of using drugs prior to treatment among MMT patients (n = 810) in Tehran according to their main drug of abuse

From: Patterns of pre-treatment drug abuse, drug treatment history and characteristics of addicts in methadone maintenance treatment in Iran

Variable Opium (N %) Crystalline heroin (N %) Other drugs (N %) Total (N %)
Smoking route
Yes 425 (77) 180 (94) 29 (48) 634 (79)
No 126 (23) 11 (6) 32 (52) 169 (21)
Total (N) 551 191 61 803
Snorting (Sniffing) route
Yes 4 (1) 14 (7) 10 (16) 28 (4)
No 547 (99) 177 (93) 51 (84) 775 (96)
Total (N) 551 191 61 803
Oral route
Yes 322 (58) 33 (17) 32 (53) 387 (48)
No 229 (42) 158 (83) 29 (47) 416 (52)
Total (N) 551 191 61 803
Injection route
Yes 3(1) 19 (10) 16 (26) 38 (5)
No 548 (99) 172 (90) 45 (74) 765 (95)
Total 551 191 61 803