Table 1 Demographic characteristics and baseline laboratory parameters of the entire study subjects

Age, years

54.8 ± 12.7

54.9 ± 13.3

54.7 ± 12.1

0.870

Male, N (%)

240(53.9)

109(52.2)

131(55.5)

0.479

Dialysis vintage, years

4.1(1.9, 7.5)

4.1(2.1, 7.5)

4.29(1.9, 7.5)

0.657

Follow-up, months

13.6(12.1, 15.4)

13.6(12.1, 15.3)

13.8(12.1, 15.5)

0.950

Cause of ESRD

0.663

 Glomerulonephritis

220(51.2)

102(50.5)

118(51.8)

 Diabetic kidney disease

102(23.7)

53(26.2)

49(21.5)

 Hypertension

49(11.4)

21(10.4)

28(12.3)

 Others

59(13.7)

26(12.9)

33(14.5)

Vascular access

0.387

 Arterial venous fistula

408(91.7)

193(92.3)

215(91.1)

 Arterial venous graft

3(0.7)

1(0.5)

2(0.9)

 Cuffed CVC

26(5.8)

14(6.7)

12(5.1)

 Temporary CVC

3(0.7)

1(0.5)

2(0.9)

 Directive Cannulation

1(0.2)

0(0.0)

1(0.4)

 Unknown

4(0.9)

0(0.0)

4(1.7)

History of myocardial infarction, N (%)

17(3.8)

7(3.4)

10(4.3)

0.613

History of cerebral hemorrhage, N (%)

10(2.3)

4(1.9)

6(2.6)

0.755

History of cerebral infarction, N (%)

36(8.1)

21(10.1)

15(6.4)

0.162

History of peripheral vascular disease, N (%)

9(2.0)

6(2.9)

3(1.3)

0.318

History of percutaneous coronary intervention, N (%)

6(1.4)

5(2.4)

1(0.4)

0.105

Hemoglobin (g/dl)

111.5 ± 13.7

111.7 ± 13.6

111.3 ± 13.8

0.777

Albumin (g/l)

40.8(38.4, 43.0)

41.0(38.7, 43.4)

40.7(38.2, 42.6)

0.117

Creatinine (umol/L)

927.6(787.0, 1071.0)

916.0(792.8, 1068.0)

934.5(785.9, 1075.0)

0.653

Kt/V

1.4(1.3, 1.6)

1.4(1.3, 1.6)

1.4(1.3, 1.7)

0.992

Phosphorus (mmol/L)

1.8 ± 0.5

1.8 ± 0.5

1.8 ± 0.5

0.970

iPTH (pg/ml)

209.1(90.4, 425.8)

238.5(97.0, 466.0)

191.6(83.5, 388.6)

0.090