Table 2. Genotype frequency.
| Genotype | No. of patients | % |
|---|---|---|
| CYP2A6 | ||
| W/W | ||
| *1/*1 | 28 | 25.9 |
| W/V other than *1/*4 | ||
| *1/*7 | 12 | 11.1 |
| *1/*9 | 32 | 29.6 |
| *1/*10 | 4 | 3.7 |
| V/V or *1/*4 | ||
| *1/*4 | 19 | 17.6 |
| *4/*7 | 3 | 2.8 |
| *4/*9 | 5 | 4.6 |
| *4/*10 | 2 | 1.9 |
| *9/*9 | 3 | 2.8 |
| ERCC1 (rs11615) 8525C>T | ||
| C/C | 64 | 59.3 |
| C/T | 37 | 34.3 |
| T/T | 7 | 6.5 |
| ERCC1(rs3212986) 19442C>A | ||
| C/C | 62 | 57.4 |
| C/A | 38 | 35.2 |
| A/A | 8 | 7.4 |
| XRCC1 (rs25487) 1196G>A | ||
| G/G | 49 | 45.4 |
| G/A | 38 | 35.2 |
| A/A | 21 | 19.4 |
Abbreviations: V=variant allele that abolishes or reduces CYP2A6 activity (*4, *7, *9, and *10); W=wild-type allele of CYP2A6 (*1).