No association was found between CYP1A1 MspI T6235C polymorphism and lung cancer risk (adjusted OR = 1.16; 95% CI = 0.87-1.53; adjusted OR = 0.83; 95% CI = 0.31-2.20; adjusted OR = 1.13; 95% CI = 0.86-1.49 for T/C genotype, C/C genotype and T/C + C/C genotypes, respectively). The gene discussed is CYP1A1; the disease is lung cancer.