Figure 2.

Circulating endothelial progenitor cell (EPC) percentage negatively correlates with erythropoietin (EPO) use. The percentage of circulating EPCs was compared against clinical parameters from patients participating in the study (n = 13). (a) Age and (b) months on dialysis were not correlated with the percentage of circulating EPCs. There was a correlation observed between patients who did not receive EPO administration by which they had significantly higher circulating EPCs compared to patients who did not receive EPO (c, P < 0.05). The percentage of EPCs in the peripheral circulation was also investigated against (d) statin use, (e) smoking status, (f) colony-forming unit (CFU) formation, and (g) late outgrowth endothelial cell (EC) formation, with no significant differences found. Data are mean ± SD and were analyzed using the Student t-test. *P < 0.05.