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Table 1 Characteristics of the participants and comparison between HD and PD

From: Mineral and bone disorder in Chinese dialysis patients: a multicenter study

Variables

All participants (n = 2074)

HD (n = 1711)

PD (n = 363)

P value

Age (years)

57.5 ± 14.3

57.1 ± 14.2

59.0 ± 14.4

0.03

Male (%)

53.8

55.8

44.1

< 0.001

Duration of dialysis (months)

33.6 ± 40.7

47.8 ± 41.2

24.1 ± 20.0

< 0.001

Cause of ESRD (%)

Glomerulonephritis

47.5

49.4

38.6

< 0.001

Hypertension

12.1

11.6

14.6

0.11

Diabetes

11.2

8.9

22.0

< 0.001

Interstitial nephritis

7.4

7.6

6.3

0.44

Obstructive nephropathy

2.4

2.4

2.5

0.85

Others

19.4

20.1

16.0

0.18

Hemoglobin (g/L)

101.0 ± 2.1

101.1 ± 2.0

99.3 ± 2.1

0.14

Serum albumin (mg/L)

37.5 ± 5.0

37.8 ± 4.8

36.1 ± 5.7

< 0.001

Corrected calcium (mg/dL) (%)

 Mean ± SD

9.3 ± 1.1

9.3 ± 1.1

9.2 ± 1.1

0.03

 < 8.4

19.4

19.4

19.4

1.00

 8.4-9.5

39.6

38.6

44.0

0.07

 > 9.5

41.0

42.0

36.6

0.06

 Phosphorus binder prescription (%)

70.5

71.4

66.7

0.35

 Vitamin D prescription (%)

61.2

64.6

43.2

< 0.001

Phosphorus (mg/dL) (%)

 Mean ± SD

6.2 ± 2.1

6.3 ± 2.1

5.7 ± 2.0

< 0.001

 < 3.5

5.8

5.0

9.6

< 0.01

 3.5-5.5

38.5

37.6

43.0

0.06

 > 5.5

55.6

57.4

47.4

< 0.01

 Phosphorus binder prescription (%)

73.0

72.6

75.0

0.65

 Vitamin D prescription (%)

66.6

66.5

67.5

0.85

iPTH (pg/mL) (%)

 Median (IQR)

269.0 (132.0 - 472.9)

265.0 (127.2 – 456.3)

304.5 (162.0 – 486.7)

0.03

 < 150

27.8

29.0

22.3

< 0.01

 Vitamin D prescription (%)

48.1

52.3

23.5

< 0.001

 150-300

26.6

26.5

27.3

0.74

 Vitamin D prescription (%)

67.9

72.4

49.5

< 0.001

 > 300

45.5

44.5

50.4

0.05

 Vitamin D prescription (%)

78.2

77.5

81.2

0.34

Phosphorus binder prescription (%)

69.4

70.8

64.0

0.03

Vitamin D prescription (%)

67.4

69.2

59.8

< 0.01

Dialysate calcium (%)

1.25 mmol/L

19.0

19.9

15.1

0.08

1.5 mmol/L

58.2

68.7

12.8

< 0.001

1.75 mmol/L

22.8

11.4

72.1

< 0.001

Elemental calcium (g/day)

1.07 ± 0.65

1.11 ± 0.67

0.91 ± 0.52

< 0.001

> 1.5 g/day (%)

28.4

30.4

19.5

< 0.01

  1. Abbreviations: HD, haemodialysis; PD, peritoneal dialysis; ESRD, end-stage renal disease; IQR, interquartile range; SD, standard deviation.