Table 1 Characteristics of the study populations

Male n (%)

152 (47.8)

98 (47.1)

54 (49.1)

0.83

Age (years)

52.00 (41.25, 61.00)

50.00 (39.00, 60.00)

56.00 (47.00, 63.00)

 < 0.01

Body mass index (kg/m²)

21.74 (19.73, 23.95)

21.76 (19.70, 23.88)

21.66 (19.80, 24.37)

0.86

Diabetes mellitus n (%)

65 (20.4)

37 (17.8)

28 (25.5)

0.14

Cardiovascular disease n (%)

44 (13.8)

24 (11.5)

20 (18.2)

0.14

Fibrinogen (g/L)

3.58 (2.89, 4.48)

3.42 (2.88, 4.26)

3.71 (2.89, 4.67)

0.06

Hemoglobin (g/L)

76.00 (63.00, 90.00)

75.00 (62.75, 88.00)

77.50 (63.00, 90.75)

0.87

White blood count (10⁹/L)

5.46 (4.48, 7.08)

5.37 (4.40, 6.91)

5.70 (4.67, 7.29)

0.16

Platelet count (10⁹/L)

140.50 (104.00, 180.75)

132.00 (99.75, 179.25)

149.50 (116.25, 182.50)

0.02

Serum creatinine (μmol/L)

810.00 (665.25, 1010.00)

830.00 (692.25, 1041.25)

768.00 (625.50, 982.25)

0.06

Serum urea nitrogen (mmol/L)

29.93 (22.70, 39.48)

31.28 (23.77, 40.60)

26.66 (20.23, 38.28)

0.01

Serum uric acid (μmol/L)

490.00 (413.50, 591.00)

490.50 (424.00, 591.50)

490.00 (405.25, 570.25)

0.50

Serum corrected calcium (mmol/L)

2.08 (1.84, 2.23)

2.08 (1.81, 2.23)

2.09 (1.92, 2.24)

0.33

Serum phosphorus (mmol/L)

1.90 (1.56, 2.31)

1.94 (1.59, 2.33)

1.85 (1.53, 2.27)

0.54

Serum albumin (g/L)

33.22 ± 5.69

33.88 ± 5.54

31.97 ± 5.79

 < 0.01

Alkaline phosphatase (U/L)

82.00 (64.00, 106.00)

83.00 (64.00, 105.50)

79.50 (64.00, 106.00)

0.88

Total cholesterol (mmol/L)

3.95 (3.31, 4.76)

3.84 (3.22, 4.67)

4.04 (3.40, 4.95)

0.07

Triglyceride (mmol/L)

1.15 (0.84, 1.59)

1.18 (0.83, 1.60)

1.09 (0.86, 1.55)

0.61

Fasting blood glucose (mmol/L)

4.78 (4.35, 5.38)

4.72 (4.35, 5.28)

4.87 (4.37, 5.49)

0.25

Ferritin (μg/L)

195.00 (81.60, 321.25)

183.50 (75.70, 333.50)

201.50 (86.52, 305.75)

0.87

Transferrin saturation (%)

25.00 (16.55, 34.00)

25.70 (17.00, 35.00)

24.00 (15.25, 31.90)

0.45

Left ventricular end-diastolic diameter (mm)

48.00 (44.00, 52.00)

47.00 (43.00, 51.00)

48.00 (45.00, 53.00)

0.07

Left atrium diameter (mm)

34.00 (30.00, 39.00)

34.00 (30.00, 39.00)

35.00 (30.00, 39.75)

0.51

Right ventricular diameter (mm)

21.00 (19.00, 23.00)

21.00 (19.00, 23.00)

21.00 (19.00, 23.00)

0.99

Interventricular septum thickness (mm)

10.00 (10.00, 12.00)

10.00 (9.00, 12.00)

11.00 (10.00, 12.00)

0.13

Left ventricular posterior wall thickness (mm)

10.00 (9.00, 11.00)

10.00 (9.00, 11.00)

10.00 (9.00, 11.00)

0.44

Left ventricular ejection fraction (%)

62.00 (60.00, 65.00)

62.00 (60.00, 65.00)

61.00 (58.00, 64.75)

0.14

Left ventricular hypertrophy n (%)

178 (56.0)

114 (54.8)

64 (58.2)

0.65

Cardiac valve calcification n (%)

45 (14.2)

26 (12.5)

19 (17.3)

0.32

24-hour ultrafiltration volume (mL)

334.12 ± 439.66

335.15 ± 421.80

332.17 ± 473.59

0.95

24-hour urine volume (mL)

800.00 (500.00, 1300.00)

900.00 (500.00, 1300.00)

800.00 (500.00, 1237.50)

0.27

Dialysate/plasma creatinine ratio at 4 h

0.58 (0.49, 0.69)

0.57 (0.48, 0.68)

0.60 (0.51, 0.69)

0.10

Follow-up time (months)

31.00 (16.25, 56.00)

35.00 (19.00, 59.75)

25.00 (11.00, 48.00)

 < 0.01