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