Table 1 The demographic characteristics of enrolled patients in the study

Peritoneal UA clearance(L/week/1.73 m²)

40.2 ± 7.1

34.6 ± 3.5

45.8 ± 5.0

–

Age (y)

45.0 ± 13.4

42.9 ± 13.2

47.1 ± 13.3

0.04

Male (n, %)

95 (52.8)

55 (61.1)

40 (44.4)

0.04

Diabetes (n, %)

24 (13.3)

13 (14.4)

11 (12.2)

0.83

CVD (n, %)

25 (13.9)

10 (11.1)

15 (16.7)

0.39

Charlson comorbidity score

3 (2–4)

2 (2–4)

3 (2–4)

0.09

Chronic glomerulonephritis (n, %)

121 (67.2)

63 (70.0)

58 (64.4)

0.53

Diabetic nephropathy (n, %)

16 (8.9)

8 (8.9)

8 (8.9)

1.00

Hypertensive kidney lesion (n, %)

14 (7.8)

5 (5.6)

9 (10.0)

0.41

Systolic pressure (mmHg)

135.0 ± 18.0

134.6 ± 17.4

135.5 ± 18.7

0.73

Diastolic pressure (mmHg)

85.5 ± 14.2

87.5 ± 12.7

83.5 ± 15.4

0.06

Hemoglobin (g/dL)

11.2 ± 1.7

11.4 ± 1.6

11.0 ± 1.7

0.11

N/L

3.5 (2.7–4.5)

3.2 (2.6–4.2)

3.7 (2.9–4.8)

0.11

HsCRP (mg/L)

1.4 (0.5–4.7)

1.5 (0.6–4.9)

1.3 (0.5–4.8)

0.79

Serum albumin (g/dL)

3.7 ± 0.4

3.8 ± 0.3

3.5 ± 0.4

<0.001

Serum prealbumin (mg/L)

351 (320–402)

354 (319–406)

347 (319–387)

0.26

Corrected calcium (mg/dL)

9.2 ± 1.0

9.1 ± 0.6

9.3 ± 1.2

0.22

Serum phosphorus (mg/dL)

4.5 ± 1.3

4.5 ± 1.1

4.5 ± 1.5

0.93

Total cholesterol (mg/dL)

193.4 (162.4–228.2)

193.4 (158.5–230.1)

193.4 (166.3–228.2)

0.62

Triglyceride (mg/dL)

136.4 (97.8–190.8)

142.1 (102.7–196.8)

131.9 (94.7–185.1)

0.27

Serum urea nitrogen (mg/dL)

45.5 (37.5–55.7)

45.4 (37.7–55.8)

45.9 (36.6–55.9)

0.91

Serum creatinine (mg/dL)

8.6 (7.3–10.8)

8.4 (7.1–10.8)

8.9 (7.3–10.9)

0.75

iPTH (pg/mL)

256.2 (149.4–401.4)

256.2 (164.0–391.1)

258.0 (139.6–454.3)

0.82

Serum UA (μmol/L)

410 ± 72

430 ± 71

391 ± 69

< 0.001

BMI (kg/m²)

21.8 ± 3.2

22.6 ± 3.2

21.0 ± 3.0

0.001

Diuretic use (n, %)

27 (15.0)

11 (12.2)

16 (17.8)

0.40