| Variables | 
        Cases           | 
        Controls | 
        p-value           | 
      
      
        | Age | 
        Mean ± Sd | 
        28.61 ± 8.51 | 
        28.61 ± 8.35 | 
        0.91* | 
      
      
        | 
            Sex           | 
        Male
            
            Female | 
        27(57.4%)
            20(42.6%) | 
        27(57.4%) 20(42.6%)
           | 
        1.# | 
      
      
        | 
            Material status | 
        Single
            Married
              
          Divorced | 
        25(53.2%)
            22(46.8%)
              
          0(.0%) | 
        24(51.1%)
            22(46.8%)
            
          1(2.1%) | 
        0.6# | 
      
      
        | Income (Toman) | 
        <200000
            200000-400000
              
            400000-600000
        >600000 | 
        9(19.1%)
          
          12(25.5%)
          14(29.8%)
          12(25.5%)
           | 
        9(19.1%)
            
            13(27.7%)
          13(27.7%)
          
          12(25.7%) | 
        0.99# | 
      
      
        | Occupation | 
        Employee
            
            Workman
            
            Housewife
            
            Businessman
          Student
          Unemployed
          Engineer | 
        15(31.9%)
            
            2(4.3%)
            
            7
          (14.9%)
          11(23.4%)
          8(17.0%)
          
          1(2.1%)
          
          3(6.4%) | 
        12(25.5%)
            
            1(2.1%)
            
            10(21.3%)
            
            13(27.7%)
            
            8(17.0%)
          1(2.1%)
          
          2(4.3%) | 
        0.95# | 
      
      
        |     Education | 
        No diploma
            Diploma
              
            Bachelor or master
            
          Doctoral degree | 
        12(25.5%)
            
            22(46.8%)
            
            13(27.7%)
            
          0(.0%) | 
        14(29.8%)
          17(36.2%)
          
          15(31.9%)
          1(2.1%)
           | 
        0.58# | 
      
      
        | Score | 
        Mean ± Sd | 
        6.97 ± 1.01 | 
        7.12 ± 0.91 | 
        0.95# |