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Table 3 Frequency of CYP1A1 variants in relation to smoking habit in patients and control

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

CYP1A1 Variant Control Patients Chi-square P-value
Non-smoker Smoker Non-smoker Smoker
   N = 120 N = 30 N = 56 N = 93   
CYP1A1*2C N (%) 18 (15) 1 (3.3) 7 (12.5) 10 (10.8) 18.9 0.03a
CYP1A1*4 N (%) 29(24.2) 4 (13.3) 15 (26.8) 31 (33.3)
CYP1A1*2C/*4 N (%) 0 (0) 0 (0) 3 (5.4) 1 (1.1)
CYP1A1*1 (wild type) N (%) 73 (60.8) 25 (83.3)a 31 (55.4) 51 (54.8)
  1. aSignificant P