CYP2C8 rs11572076 was associated with the risk of anemia (HR 3.4 [95% CI 1.7–6.20], p = 00037), as was IL12A rs568408 (HR 1.98 [95% CI 1.39–2.82], p = 0.00014) and HUS1 rs2037483 (HR 0.54 [95% CI 0.39–0.74], p = 0.00016). This evidence concerns the gene IL12A and anemia (phenotype).