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Table 4 Association of CYP1A1 polymorphisms and smoking with lung cancer risk

From: Genetic polymorphisms of human cytochrome P450 CYP1A1 in an Egyptian population and tobacco-induced lung cancer

CYP1A1 Variant Non-smokers Smokers OR 95% CI P-value
N = 56 N = 93
N (%) N (%)
CYP1A1*2C 7 (12.5) 10 (10.8) 1.19 (0.42–3.32) 0.75
CYP1A1*4 15 (26.8) 31 (33.3) 0.73 (0.35–1.52) 0.20
CYP1A1*2C/*4 3 (5.4) 1 (1.1) 5.21 (0.53–51.3) 0.12
CYP1A1*1 (wild type) 31 (55.4) 51 (54.8) 0.98 (0.50–1.91) 0.95