Table 4. Summary of correlations between relative changes in the number of EPC subsets.

CFU-ECs/106 cells	0.987**
CACs/mL	-0.179	-0.170
CACs/106 cells	-0.214	-0.153	0.349
ECFCs/mL	-0.222	-0.250	0.714*	0.002
CAC precursors/mL	-0.385	-0.328	0.713*	0.275	0.411
ECFCs/106 cells	-0.125	-0.165	0.082	0.276	0.497	-0.109
CAC precursors/106 cells	-0.331	-0.241	-0.031	0.611	-0.251	0.508	0.073
	CFU-ECs/mL	CFU-ECs/106 cells	CACs/mL	CACs/106 cells	ECFCs/mL	CAC precursors/mL	ECFCs/106 cells

Data shown are Spearman's correlation coefficient. ^*Statistically significant at p<0.05, ^**Statistically significant at p<0.01. EPC: endothelial progenitor cell, CFU-EC: colony forming unit endothelial cell, CAC: circulating angiogenic cell, ECFC: endothelial colony forming cell, mL: milliliter