99-4.10, P = 0.054). ERCC2 312 polymorphism was not associated with risk of lung adenocarcinoma in this study. Considering the problem of sample size, further analyses were carried on by combining the heterozygous variant genotype with the homozygous variant genotype in three polymorphisms. As a result, the combined ERCC2 751AC/CC was associated with an increased risk of lung adenocarcinoma with Adriamycin an adjusted OR of 1.64 (95%CI 1.06-2.52, P = 0.025). Table 2 ERCC2 751, 312 and ERCC1 188 polymorphisms and lung adenocarcinoma risk Genotype Cases n (%) Controls n (%) OR [95%CI]a P value ERCC2

751            AA 220 (77.2) 242 (84.9) 1.00 —    AC 61 (21.4) 40 (14.0) 1.66 [1.07-2.59] 0.024    CC 4 (1.4) 3 (1.1) 1.28 [0.28-5.86] 0.751    AC/CCb 65 (22.8) 43 (15.1) 1.64 [1.06-2.52] 0.025 ERCC2 312            GG 246 (86.3) 255 (89.5) 1.00 —    GA 38 (13.3) 30 (10.5) 1.30 [0.78-2.17] 0.317    AA 1 (0.4) 0 (0.0) –e —    GA/AAc 39 (13.7) 30 (10.5) 1.33 [0.80-2.21] 0.275 ERCC1 118            CC 156 (54.7) 176 (61.8) 1.00 —    CT 104 (36.5) 96 (33.6) 1.19 [0.84-1.70] 0.334    TT 25 (8.8) 13 (4.6) 2.01 [0.99-4.10] 0.054    CT/TTd 129 (45.3) 109 (38.2)

PU-H71 1.29 [0.92-1.81] 0.139 Abbreviation: OR, odds ratio; CI, confidence interval. aORs were calculated by unconditional logistic regression and adjusted for age and cooking oil fume. bOR and P value were calculated compared with wild genotype(AA) of ERCC2 751 polymorphism. cOR and P value were calculated compared with wild genotype(GG) of ERCC2 312 polymorphism. dOR and P value were calculated compared with wild genotype(CC) of ERCC1 118 polymorphism. eOR and P value for this genotype could not be calculated. In the selleck chemicals stratified analyses, we found that the increased risk associated with ERCC2 751 variant genotypes (AC/CC) was more pronounced in individuals without exposure to cooking oil fume (OR 1.98, 95%CI 1.18-3.32, P = 0.010) and those without exposure to fuel smoke (OR 2.47, 95%CI 1.46-4.18, P = 0.001) (Table 3). Stratified by other environmental exposures, check no statistically significant relationships were suggested (data not shown). We

evaluated the interaction of genetic polymorphism with cooking oil fume exposure on lung adenocarcinoma using a logistic regression model. However, no evidence of significant gene-environment interaction was found (data not shown). Table 3 ERCC2 751 SNP in relation to risk of lung adenocarcinoma, stratified by environmental exposures Group Cases n (%) Controls n (%) OR [95%CI]* P value Cooking oil fume exposure         Non exposure             ERCC2 751 AA 137 (75.7) 181 (86.2) 1.00 —     ERCC2 751 AC/CC 44 (24.3) 29 (13.8) 1.98 [1.18-3.32] 0.010 Exposure             ERCC2 751 AA 83 (79.8) 61 (81.3) 1.00 —     ERCC2 751 AC/CC 21 (20.2) 14 (18.7) 1.03 [0.48-2.21] 0.940 Fuel smoke exposure         Non exposure             ERCC2 751 AA 150 (74.6) 182 (87.9) 1.00 —     ERCC2 751 AC/CC 51 (25.4) 25 (12.1) 2.47 [1.46-4.18] 0.