| Variable | Odds Ratio | CI (95%) | P-value | 
      
        | Smoking (Currently) | 12.15 | 1.17-41.81 | .017 | 
      
        | First consumed drug (other than cigarettes and alcohol)
 |  |  |  | 
      
        | Cannabis | 1 | - | - | 
      
        | Opium | 3.04 | 0.78-11.90 | 0.112 | 
      
        | Heroin | 6.87 | 0.64-24.40 | 0.109 | 
      
        | Have drug user in the family | 2.54 | 1.05-7.65 | 0.026 | 
      
        | Having lower hope to quit | 2.61 | 1.05-5.48 | 0.036 | 
      
        | Unemployed after quitting | 2.78 | 1.17- 7.41 | 0.032 | 
      
        | Stayed connected with drug user friends after quitting | 46.7 | 12.7-80.9 | P<0.001 |