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Table 1 Socio-demographic and clinical characteristics of the methadone patient population in Basel-City, Switzerland, 1996 and 2003

From: There is no age limit for methadone: a retrospective cohort study

Variables Sample 1996 (n = 1,195) Sample 2003 (n = 958) Statistical data
Age in years, mean (SD) 30.3 (6.3) 38.0 (7.1) T[1602,7] = 24.39; p < 0.001
Age category    Chi2 [3] = 419.32; p < 0.001
   20-29 yrs 52.8 12.3  
   30-39 yrs 39.0 48.9  
   40-49 yrs 7.8 34.2  
   > 50 yrs 0.4 4.6  
Men 67.7 68.3  
Dose in mg, mean (SD) 70.4 (39.9) 80.9 (59.4) T[1213] = 3.71; p < 0.001
Yrs in current treatment, mean (SD) 3.2 (3.2) 8.6 (4.3) T[1296,3] = 29.12; p < 0.001
1-year retention rate 65.4 86.9 Chi2 [1] = 111.13; p < 0.001
Educational level    Chi2 [2] = 20.70; p < 0.001
   Regular school 56.5 45.4  
   Apprenticeship 40.2 51.1  
   Higher education 3.3 3.5  
Employment status/source of income    Chi2 [2] = 104.55; p < 0.001
   Employed (unemployment ins. incl.) 48.9 24.1  
   Social welfare 24.0 33.9  
   Disability pension 27.1 42.0  
Heroin use in the past month 74.5 47.1 Chi2 [1] = 95.37; p < 0.001
Cocaine use in the past month 36.5 49.6 Chi2 [1] = 13.83; p < 0.001
  1. Values are percentages unless otherwise indicated.