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Table 1 Socio-demographic characteristics of participants (n = 300)

From: Psychometric properties of the medical outcomes study: social support survey among methadone maintenance patients in Ho Chi Minh City, Vietnam: a validation study

Characteristics Frequency Percentage
Sex
 Male 276 92.0
 Female 24 8.0
Marital status
 Single 101 33.7
 Married/live with partners 140 46.7
 Divorced/Separated/Widowed 59 19.6
Highest level of education
 Illiterate 11 3.7
 Primary school 52 17.3
 Secondary school 142 47.3
 High school 75 25.0
 College or more 20 6.7
Occupation   
 Unemployed 113 37.7
 Part-time job 80 26.7
 Full-time job 107 35.6
Have a religious affiliation
 Yes 166 55.3
 No 134 44.7
  Mean (SD) Median (Min - Max)
Age, years 37.0 (5.5) 36.0 (26–58)
Age of first drug use, years 19.7 (4.8) 19.0 (12–41)
Duration on MMT, years 4.7 (2.8) 4.8 (0.17–9)