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Table 1 Demographics of Study Sample (N = 69,891)

From: Mono- versus polydrug abuse patterns among publicly funded clients

  Frequency
Variable n %
Gender   
   Male 48,168 68.9
   Female 21,723 31.1
Ethnicitya   
   Caucasian 46,910 69.2
   African American 20,393 30.1
   Other 495 0.7
Ageb   
   <18 6,955 10.0
   18–24 10,701 15.3
   25–34 20,671 29.6
   35–44 21,893 31.3
   45–54 8,266 11.8
   ≥ 55 1,404 2.0
Residential Area   
   Urban 35,062 50.2
   Rural 34,829 49.8
Year Admitted to Treatment   
   1998 9,911 14.2
   1999 9,123 13.1
   2000 9,598 13.7
   2001 10,214 14.6
   2002 9,891 14.2
   2003 10,738 15.4
   2004 10,416 14.9
  1. a2,093 missing ethnicity responses were removed from the total N for ethnicity percentages.
  2. b1 missing age response.