|   | 
        Mustard Gass Keratitis | 
          | 
       
      
        | No | 
        Rule out MGK | 
        Mild MGK | 
        Moderate MGK | 
        Severe MGK | 
          | 
       
      
        | N | 
        % | 
        N | 
        % | 
        N | 
        % | 
        N | 
        % | 
        N | 
        % | 
        P value | 
       
      
        | Tearing | 
        No | 
        7  | 
        4.6%  | 
        1  | 
        2.4%  | 
        0  | 
        0.0%  | 
        1  | 
        5.0%  | 
        1  | 
        5.3%  | 
        0.433 | 
       
      
        | Yes | 
        144  | 
        95.4%  | 
        40  | 
        97.6%  | 
        72  | 
        100.0%  | 
        19  | 
        95.0%  | 
        18  | 
        94.7%  | 
       
      
        | Itching | 
        No | 
        8  | 
        5.3%  | 
        2  | 
        4.9%  | 
        1  | 
        1.4%  | 
        1  | 
        5.0%  | 
        0  | 
        0.0%  | 
        0.576 | 
       
      
        | Yes | 
        143  | 
        94.7%  | 
        39  | 
        95.1%  | 
        71  | 
        98.6%  | 
        19  | 
        95.0%  | 
        19  | 
        100.0%  | 
       
      
        | Red Eye | 
        No | 
        9  | 
        6.0%  | 
        2  | 
        4.9%  | 
        1  | 
        1.4%  | 
        2  | 
        10.0%  | 
        0  | 
        0.0%  | 
        0.335 | 
       
      
        | Yes | 
        142  | 
        94.0%  | 
        39  | 
        95.1%  | 
        71  | 
        98.6%  | 
        18  | 
        90.0%  | 
        19  | 
        100.0%  | 
       
      
        | Blurred Vision | 
        No | 
        28  | 
        18.5%  | 
        7  | 
        17.1%  | 
        9  | 
        12.5%  | 
        3  | 
        15.0%  | 
        1  | 
        5.3%  | 
        0.544 | 
       
      
        | Yes | 
        123  | 
        81.5%  | 
        34  | 
        82.9%  | 
        63  | 
        87.5%  | 
        17  | 
        85.0%  | 
        18  | 
        94.7%  | 
       
      
        | Vision loss | 
        No | 
        96  | 
        63.6%  | 
        26  | 
        63.4%  | 
        45  | 
        62.5%  | 
        13  | 
        65.0%  | 
        10  | 
        52.6%  | 
        0.920 | 
       
      
        | Yes | 
        55  | 
        36.4%  | 
        15  | 
        36.6%  | 
        27  | 
        37.5%  | 
        7  | 
        35.0%  | 
        9  | 
        47.4%  | 
       
      
        |   | 
        * P value calculated Base on Chi Square    test | 
         | 
          | 
       
      |