| 
      
        | Characteristic | ADHD | Non ADHD Group | T Test |  
        | Group N= 40 | N= 77 | T | DDL | p value |  
        |  | Mean | SD | Mean | SD |  
        | Age | 42,70 | 10,63 | 43,50 | 12,40 | -0,752 | 2-111 | ns |  
        | Age at beginning | 19,80 | 7,16 | 24,70 | 10,30 |  |  | * |  
        | Tobacco : cig./day | 16,60 | 11,20 | 11,70 | 12,30 | 2,19 | 2-112 | 0,03 |  
        | Tobacco : cig./Before | 1,12 | 0,32 | 1,34 | 0,51 | -2,32 | févr-93 | 0,02 |  | 
  
    | 
      
        | Characteristic | ADHD | Non ADHD Group |  | T Test (criterion yes) |  
        | Group N= 40 | N= 77 | Total | T | DDL | p value |  
        | criterion | Yes | No | Yes | No |  
        |  | Number | % | number | % | Number | % | number | % |  
        | Cannabis | 15 | 13,64 | 25 | 22,73 | 9 | 8,18 | 61 | 55,45 | 110 | -2,56 | 2-109 | 0,012 |  
        | Ecstasy | 2 | 1,83 | 37 | 33,94 | 3 | 2,75 | 67 | 61,47 | 109 | 0,341 | 2-108 | 0,733 |  
        | Heroin | 5 | 4,55 | 35 | 31,82 | 8 | 7,27 | 62 | 56,36 | 110 | 0,216 | 2-109 | 0,829 |  
        | Cocaine | 4 | 3,64 | 36 | 32,73 | 6 | 5,45 | 64 | 58,18 | 110 | 0,188 | 2-109 | 0,851 |  
        | Alcool | 32 | 28,83 | 8 | 7,21 | 53 | 47,75 | 18 | 16,22 | 111 | -0,41 | 2-110 | 0,679 |  
        | Bulimia nervosa | 9 | 7,89 | 32 | 28,07 | 22 | 19,30 | 51 | 44,74 | 114 | 0,938 | 2-112 | 0,082 |  
        | Anorexie | 4 | 3,51 | 37 | 32,46 | 15 | 13,16 | 58 | 50,88 | 114 | 1,485 | 2-112 | 0,14 |  
        | Compulsive buying | 10 | 8,77 | 31 | 27,19 | 14 | 12,28 | 59 | 51,75 | 114 | -0,65 | 2-112 | 0,517 |  |