|   | 
        Overall n=60 | 
        TPC 
          n=31 | 
        CPC 
          n=29 | 
        P for group difference | 
       
      
        | Sex (% female (n)) | 
        65.0%  
          (39) | 
        64.5%  
          (20) | 
        65.5%  
          (19) | 
        0.94 | 
       
      
        | Age at baseline (mean (sd), range) | 
        54.7  
          (10.5)  
          24-72 | 
        55.9  
          (9.4) 
          35-72 | 
        53.4  
          (11.6)  
          24-72 | 
        0.37 | 
       
      
        | Race (% non-Caucasian (n)) | 
        10.0%  
          (6) | 
        9.7%  
          (10) | 
        10.3%  
          (3) | 
        0.85 | 
       
      |