Table 7 shows that there were significant differences in the aspects of anemia (EMs 4.2% vs. IMs 19.7% and PMs 23.5%, p = 0.011) and FN (EMs 7.0% vs. IMs 31.8% and PMs 29.4%, p = 0.001) among the three groups of UGT1A1 phenotypes. The UGT1A1 IM and PM groups tended to be susceptible to NP grade 4, although the differences were not statistically significant. This evidence concerns the gene UGT1A1 and anemia.