|   | 
        Region | 
          | 
          | 
       
      
        |   | 
        south-western  | 
        south -    eastern  | 
        Total | 
        p value | 
       
      
        | Genotypes | 
          | 
          | 
          | 
          | 
       
      
        | wt/wt | 
        213 (79.5%) | 
        204 (81%)  | 
        417(80.2%) | 
        0.12 | 
       
      
        | wt/del32 | 
        48 (17.9%) | 
        47 (18.6%)  | 
        95 (18.3%) | 
       
      
        | del32/del32 | 
        7 (2.6%)  | 
        1 (0.4%)  | 
        8 (1.5%) | 
       
      
        | Total | 
        268 | 
        252 | 
        520 | 
          | 
       
      
        | Alleles | 
          | 
          | 
          | 
        0.33 | 
       
      
        | del32 | 
        62 (11.6%)  | 
        49 (9.7%)  | 
        111    (10.7%)  | 
       
      
        | wt | 
        474    (88.4%)  | 
        455    (90.3%)  | 
        929    (89.3%)  | 
       
      
        | Total | 
        536 | 
        504 | 
        1040 | 
          | 
       
      |