| UGT1A1*28 (genotyped 149) n(%) | |
| Wild/wild | 47 (31.33) |
| Wild/mutant | 72 (48.00) |
| Mutant/mutant | 30 (20.00) |
| Not genotyped | 1 (00.66) |
| UGT1A1*6 (genotyped = 150) | |
| Wild/wild | 142 (94.66) |
| Wild/mutant | 7 (4.66) |
| Mutant/mutant | 1 (0.66) |