| 
      
        | Variables | TT Genotype
          n(%) | TG Genotype
          n(%) | GG Genotype
          n(%) | T allele
          frequency  | G allele frequency  | Chi-Square | df | P –value |  
        | Gender |  
        | Males | 26(23.2) | 65(58.0) | 21(18.8) | 0.52 | 0.48 | 5.3 | 2 | 0.06 |  
        | Females | 2(8.3) | 13(54.2) | 9(37.5) | 0.35 | 0.65 |  |  |  |  
        | Age    at diagnosis (Years) |  
        | ≤45 | 3(13.6) | 15(68.2) | 4(18.2) | 0.48 | 0.52 |  |  | 0.56 |  
        | >45 | 25(21.9) | 63(55.3) | 26(22.8) | 0.5 | 0.5 |  |  |  |  
        | Histological    Type |  
        | SCC | 19(24.1) | 41(51.8) | 19(24.1) | 0.5 | 0.5 | 2.41 | 2 | 0.29 |  
        | ADC | 9(15.8) | 37(64.9) | 11(19.2) | 0.48 | 0.52 |  |  |  |  
        | TNM    Stage |  
        | Early Stage (I&II) | 10(19.6) | 36(70.6) | 5(9.8) | 0.55 | 0.45 | 8.09 | 2 | 0.01 |  
        | Advanced Stage 
          (III& IV) | 18(21.1) | 42(49.5) | 25(29.4) | 0.46 | 0.54 |  |  |  |  
        | Metastasis |  
        | Positive | 10(29.4) | 11(32.4) | 13(38.2) | 0.46 | 0.54 | 12.03 | 2 | 0.002 |  
        | Negative | 18(17.6) | 67(65.7) | 17(16.7) | 0.5 | 0.5 |  |  |  |  
        | Family    History of any Cancer |  
        | Significant | 9(50.0) | 8(44.4) | 1(5.6) | 0.72 | 0.28 |  |  | 0.004 |  
        | Non    Significant | 19(16.1) | 70(59.3) | 29(24.6) | 0.46 | 0.54 |  |  |  |  
        | Smoking    Status |   |   |  
        | Non Smoker | 4(11.4) | 24(68.6) | 7(20.0) | 0.46 | 0.54 | 3.05 | 2 | 0.22 |  
        | Smokers | 24(23.7) | 54(53.5) | 23(22.8) | 0.5 | 0.5 |  |  |  |  
        | Smoking    Level ( Pack Year) |  
        | Mild (≤10) | 0(0) | 9(90.0) | 1(10.0) | 045 | 0.55 | 10.3 | 4 | 0.036 |  
        | Moderate (≤40) | 10(22.2) | 27(60.0) | 8(17.8) | 0.52 | 0.48 |  |  |  |  
        | Heavy (>40) | 14(30.4) | 18( 39.0) | 14(30.4) | 0.5 | 0.5 |  |  |  |  
        | Smoking    Type |  
        | Cigarette | 8(27.6) | 16(55.2 ) | 5(17.2) | 0.55 | 0.45 |  |  | 0.99 |  
        | Huka | 7(27.0) | 14(53.8) | 5(19.2) | 0.54 | 0.46 |  |  |  |  
        | Bidi | 3(23.0) | 8(61.6) | 2(15.4) | 0.54 | 0.46 |  |  |  |  
        | Cigarette+Bidi | 1(9.0) | 4(36.4) | 6(54.6) | 0.27 | 0.73 |  |  | 0.08 |  
        | Cigarette+Huka | 9(40.9) | 12(54.5) | 5(22.7) | 0.58 | 0.42 |  |  |  |  
        | Cytological    Type |  
        | Squamous    Cell Carcinoma |  
        | Well Differentiated | 11( 25.5) | 22(51.2) | 10(23.3) | 0.51 | 0.49 |  |  | 0.56 |  
        | Moderately Differentiated | 7(31.8 ) | 10(45.5) | 5(22.7) | 0.55 | 0.45 |  |  |  |  
        | Poorly Differentiated | 1(7.1 ) | 9(64.3 ) | 4(28.6) | 0.39 | 0.61 |  |  |  |  
        | Adenocarcinoma |  
        | Well Differentiated | 2(18.2) | 9(81.8 ) | 0(0 ) | 0.59 | 0.41 |  |  | 0.07 |  
        | Moderately Differentiated | 0(0) | 12(75.0) | 4(25.0) | 0.38 | 0.63 |  |  |  |  
        | Poorly Differentiated | 7(23.3) | 16(53.3) | 7(23.3) | 0.5 | 0.5 |  |  |  |  |