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Table 1 Demographic and substance use characteristics of participants

From: Treatment adherence amongst drug users attending public and private methadone maintenance clinics in a northern province of Vietnam

Characteristics Completely adherence Incompletely adherence Total p-value
n % n % n %
Age group
 Under 30 10 5.9 38 17.0 48 12.2 0.01*
 30–40 77 45.0 92 41.1 169 42.8  
 41–50 61 35.7 65 29.0 126 31.9  
 Above 50 23 13.5 29 13.0 52 13.2  
Education
 Less than secondary 30 17.5 36 16.1 66 16.7 0.38*
 Secondary school 107 62.6 130 58.0 237 60.0  
 More than secondary 34 19.9 58 25.9 92 23.3  
Marital status
 Single 20 11.7 47 21.0 67 17.0 0.05*
 Living with partners/ spouses 141 82.5 163 72.8 304 77.0  
 Divorced/widow 10 5.9 14 6.3 24 6.1  
Employment
 Unemployment 10 5.9 23 10.3 33 8.4 0.01*
 Freelancer 49 28.7 90 40.2 139 35.2  
 Blue collar worker/farmer 45 26.3 47 21.0 92 23.3  
 Self-employed 11 6.4 17 7.6 28 7.1  
 Others 56 32.8 47 21.0 103 26.1  
Quintile monthly family income
 First 35 20.5 45 20.1 80 20.3 0.65*
 Second 37 21.6 45 20.1 82 20.8  
 Third 29 17.0 52 23.2 81 20.5  
 Fourth 38 22.2 44 19.6 82 20.8  
 Fifth 32 18.7 38 17.0 70 17.7  
Alcohol drinking 88 51.5 123 54.9 211 53.4 0.50*
Smoking 139 81.3 181 80.8 320 81.0 0.90*
  Mean SD Mean SD Mean SD p-value
Average family income (USD) 375.9 246.7 472.1 679.5 430.5 538.4 0.92#
  1. *Chi square test, # Mann-Whiney rank sum test