| Variable | 
        Total sample (n=85) | 
        Non-relapse group (n=53) | 
        Relapse group (n=32) | 
        p-value | 
       
      
        | Categorical variables1 | 
          | 
          | 
          | 
          | 
       
      
        | Low nutritional status | 
        29.41 | 
        35.85 | 
        18.75 | 
        0.094 | 
       
      
        | Alcohol withdrawal | 
        83.53 | 
        90.57 | 
        71.88 | 
        0.024 | 
       
      
        | Continuous variables2 | 
          | 
          | 
          | 
          | 
       
      
        | Age | 
        44.05 (9.34) | 
        45.70 (10.43) | 
        41.31 (9.34) | 
        0.054 | 
       
      
        | Baseline number of    cigarettes / day | 
        20.39 (15.57) | 
        16.43 (13.61) | 
        26.94 (16.59) | 
        0.002 | 
       
      
        | Severity index for    legal area | 
        0.71 (2.02) | 
        0.28 (1.25) | 
        1.52 (2.84) | 
        0.046 | 
       
     
      1For categorical variables, percentage of the category of interest for the whole sample and each group (non-relapse vs relapse), with p-value of the chi- 
      2 test between groups
    2For continuous variables, mean value (SD) for the whole sample and each group (non-relapse vs relapse), with the p-value of the Student’s t test comparing groups |