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| CYP2A6 genotypes | Number of subjects | |||
|
| ||||
| Current smokers | Ex-smokers | Never smokers | Total | |
| CYP2A6*1A/*1A | 7 (25%) | 4 (14%) | 17 ( 61%) | 28 (100%) |
| CYP2A6*1A/*1B | 21 (25%) | 17 (21%) | 45 ( 54%) | 83 (100%) |
| CYP2A6*1B/*1B | 13 (27%) | 6 (12%) | 30 ( 61%) | 49 (100%) |
| CYP2A6*1A/*4C | 10 (27%) | 7 (19%) | 20 ( 54%) | 37 (100%) |
| CYP2A6*1B/*4C | 6 (17%) | 10 (29%) | 19 ( 54%) | 35 (100%) |
| CYP2A6*4C/*4C | 0 ( 0%) | 0 ( 0%) | 8 (100%) | 8 (100%) |
