Pre- and on-treatment serum EPO levels with regard to
rs1617640 genotypes. Pretreatment serum EPO concentrations were equally distributed among major T allele carriers and minor G homozygotes. On-treatment serum EPO concentrations of EPO rs1617640 G homozygotes and T allele carriers at week 4 and 8 of therapy, however, differed significantly in a linear model. Data on serum EPO concentrations were available in 181, 112 and 78 individuals at week 0, 4 and 8, respectively. Medians and IQRs are given.