Figure 1. Perioperative hematocrit levels in patients undergoing preoperative autologous blood donation (PAD group), acute normovolemic hemodilution (ANH group), or preoperative recombinant human erythropoietin therapy combined with acute normovolemic hemodilution (ANH + rHuEPO group). Values are mean +/- SD. *P < 0.001 was statistically significant compared with the PAD and ANH groups;[dagger] P < 0.05 was significant compared with the PAD group. Pre = preoperative day; DOS = day of surgery; PACU = postanesthesia care unit; POD = post-operative day.