|   | 
        HIV-uninfected 
          non-IDUs 
          (N=13)  | 
        HIV-uninfected 
          IDUs 
          (N=19)  | 
        HIV-infected non-IDUs 
          (N=8)  | 
        HIV-infected IDUs 
          (N=10)  | 
       
      
        | Gender (% male) | 
        61.5 | 
        68.4 | 
        87.5 | 
        90.0 | 
       
      
        | Age (mean yrs, sd) | 
        39.0 (9.5) | 
        37.4 (8.5) | 
        40.5 (8.6) | 
        42.1 (8.1) | 
       
      
        | Race/Ethnicity (%)* | 
       
      
        | Black | 
        15.4 | 
        10.5 | 
        75.0 | 
        20.0 | 
       
      
        | Hispanic | 
        69.2 | 
        73.7 | 
        25.0 | 
        80.0 | 
       
      
        | White | 
        15.4 | 
        15.8 | 
        0 | 
        0 | 
       
      
        | Education (%)* | 
       
      
        | <HS | 
        7.7 | 
        42.1 | 
        25.0 | 
        50.0 | 
       
      
        | GED/HS | 
        23.1 | 
        36.8 | 
        25.0 | 
        50.0 | 
       
      
        | >HS | 
        69.2 | 
        21.1 | 
        50.0 | 
        0 | 
       
      
        | Homelessness (%) | 
        0 | 
        10.5 | 
        0 | 
        0 | 
       
      
        HIV viral load  
          (copies/ml plasma),  
          mean, (range) | 
        <48 | 
        <48 | 
        58,409  
          (13,571-214,696) | 
        63,046 
          (7,259-111,609) | 
       
      
        CD4 count (cells/mm3),  
          mean, (range) | 
        925 
          (442-1449) | 
        950 
          (456-2021) | 
        456 
          (37-645) | 
        264 
          (9-819) | 
       
      
        | HCV-infected (number, %) | 
        0/13 | 
        14/19 (74) | 
        1/9 (11) | 
        9/10 (90) | 
       
      |