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Table 1 Demographic and clinical characteristics of opioid-dependent men and women receiving methadone treatment

From: Sex differences in substance use, health, and social functioning among opioid users receiving methadone treatment: a multicenter cohort study

   Sex
Characteristic Total Men Women
  n = 492 n = 266 n = 226
Age, years; mean (SD) 38.3 (11.0) 39.5 (11.7) 36.9 (9.9)
European ethnicity; n (%) 393 (80.9) 219 (83.0) 174 (78.4)
Completed high school education; n (%) 136 (27.9) 65 (24.6) 71 (32.0)
Substance use and treatment history    
 Age of initial opioid use, years; mean (SD) 25.0 (8.7) 24.9 (9.2) 25.1 (8.0)
 Physician prescribed first opioid use; n (%) 217 (44.2) 100 (37.7) 116 (51.6)
 Daily methadone dose, milligram; mean (SD) 77.6 (44.1) 81.3 (48.3) 73.3 (38.3)
 Age of first MMT, years; mean (SD) 32.2 (9.6) 32.7 (10.1) 31.5 (9.0)
 Duration of MMT, months; mean (SD) 51.6 (49.3) 52.9 (50.7) 49.9 (47.7)
 Previous treatment, any; n (%) 149 (30.7) 90 (34.2) 59 (26.6)
 Previous MMT treatments, number; mean (SD) 1.5 (1.1) 1.6 (1.1) 1.4 (0.9)
  1. SD standard deviation, MMT methadone maintenance treatment