Table 2. Cluster analysis of EC serum samples.

	Total cfDNA concentration (ng/ml) ±SD
G1 EC	645.6 ± 253.5
G2 EC	886.1 ± 336.7
G3 EC	846.3 ± 424.6
Non-hypertensive G1 EC	661.7 ± 224.7
Hypertensive G1 EC	668.9 ±324.8
Non-hypertensive G2 EC	711.2 ±211.9
Hypertensive G2 EC	912.0 ±216.2
Non-hypertensive G3 EC	622.9 ±298.5
Hypertensive G3 EC	897.1 ±396.2

Mean of cfDNA concentration ±SD in G1, G2 and G3 EC serum samples and in the relative subgroups of hypertensive and non- hypertensive G1, G2 and G3 EC patients. SD: standard deviation.