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Table 1 Demographic and clinical characteristics according to the HIV serostatus of methadone patients from four hospitals

From: Psychometric properties of the Chinese craving beliefs questionnaire for heroin abusers in methadone treatment

   Participants
   N = 505
Age (years, mean ± SD) 40.7 ± 9.4
Age at first heroin use (years, mean ± SD) 27.4 ± 7.5
Education (years, mean ± SD) 9.18 ± 2.22
Average methadone dose at interview (mg, mean ± SD) 48.0 ± 32.8
Duration from intake to interview (days, mean ± SD) 184 ± 149
Gender Male 440 (87%)
  Female 65 (13%)
Employed No 181 (36%)
  Yes 324 (64%)
HCV Negative 79 (16%)
  Positive 426 (84%)
HIV Negative 439(87%)
  Positive 66 (13%)
Urine test at interview Negative 307 (61%)
  Positive 198 (39%)