|  | Control group | Cpk | Cpa |  | χ2 | p | OR | 95%CI | 
      
        | ERCC4rs3136176 / ERCC4rs1799798 | 
      
        | A A | 45.89 (0.111) | 13.00 (0.197) | 23.99 (0.133) | Cpkvs.Cpa
          Cpkvs. Control group
          Cpavs. Control group | 1.534
          3.854
          0.575 | 0.215556
          0.049650
          0.448350 | 0.627
          1.956
          1.226 | 0.298 – 1.319
          0.991 – 3.861
          0.723 – 2.080 | 
      
        | A G | 267.11 (0.645) | 37.00 (0.561) | 102.01 (0.567) | Cpkvs.Cpa
          Cpkvs. Control group
          Cpavs. Control group | 0.007
          1.899
          3.564 | 0.931129
          0.168200
          0.059054 | 1.025
          0.692
          0.709 | 0.581 – 1.810
          0.408 – 1.171
          0.496 – 1.014 | 
      
        | T G | 98.89 (0.239) | 16.00 (0.242) | 53.99 (0.300) | Cpkvs.Cpa
          Cpkvs. Control group
          Cpavs. Control group | 0.785
          0.002
          2.343 | 0.375562
          0.967137
          0.125836 | 1.339
          1.013
          1.356 | 0.701 – 2.557
          0.552 – 1.858
          0.917 – 2.005 | 
      
        | T A | 2.11 (0.005) | 0.00 (0.000) | 0.01 (0.000) | Cpkvs.Cpa
          Cpkvs. Control group
          Cpavs. Control group | –
          –
          – | –
          –
          – | –
          –
          – | –
          –
          – | 
      
        | Total control    group= 414.0, total Cpk= 66.0, total Cpa=180.0
          Cpkvs.Cpa: χ2Global= 1.868017,    df= 2 (frequency <0.03 in both Cpk&Cpa has been dropped), p= 0.392975
          Cpk vs.    control group: χ2Global= 4.070642,    df= 2 (frequency <0.03 in both Cpk& control group has been dropped), p= 0.130639
          Cpa vs.    control group: χ2Global= 3.586152,    df= 2 (frequency <0.03 in both Cpa& control group has been dropped), p= 0.166447 |