Coefficient Standard error t statistic p value Age 13.78 31.02 0.44 0.66 Dialysis time -1248.63 310.15 -4.03 0.0001 Kt/V 1298.04 1573.96 0.82 0.41 C-reactive protein 428.90 522.17 0.82 0.41 Ferritin 3.44 1.92 1.79 0.08

Table 2: Multiple regression analysis with weekly epoetin dose as dependent variable.