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Table 1 Characteristics of patients included in the hepcidin cohorta

From: The effect of high-dose vitamin D supplementation on hepcidin-25 and erythropoiesis in patients with chronic kidney disease

Patient characteristics

Cholecalciferol (n = 43)

PBO (n = 45)

p-value

Male sex, n (%)

24 (56)

35 (78)

0,03

Age (years)

62 (± 16)

64 (± 14)

0,59

BMI (kg/m2)

28,0 (± 4,8)

28,8 (± 7,2)

0,53

eGFR (ml/min/1,73m2)

32 (± 13)

30 (± 12)

0,47

CKD stage G3, n (%)

19 (44)

16 (36)

0,47

CKD stage G4, n (%)

24 (56)

29 (64)

-

Cause of CKD

 Diabetes mellitus, n (%)

13 (30)

13 (29)

0,89

 Glomerulonephritis, n (%)

8 (19)

8 (18)

0,92

 PKD, n (%)

5 (12)

1 (2)

0,08

 Nephrosclerosis, n (%)

11 (26)

12 (27)

0,91

 Other, n (%)

6 (14)

11 (24)

0,21

Oral iron, n (%)

9 (21)

4 (9)

0,13

Intravenous iron, n (%)

1 (2)

0 (0)

-

ESA, n (%)

4 (9)

5 (9)

0,8

Hemoglobin (g/L)

129 (± 16)

132 (± 16)

0,49

Hematocrit (%)

39 (± 5)

40 (± 5)

0,37

Erythrocytes (1012/L)

4,2 (± 0,53)

4,4 (0,59)

0,33

Ferritin (µg/L)

121 (76–256)

123 (60–237)

0,78

TSAT (%)

27 (± 9)

26 (± 10)

0,60

S-iron (µmol/L)

16 (± 5)

16 (± 5)

0,9

Hepcidin (nmol/L)b

5,2 (2,8–10)

4,4 (1,4 – 7,3)

0,18

Hepcidin/ferritin ratioc

43 (23–60)

31 (17–44)

0,02

CRP (mg/L)

2,0 (0,71 – 5,5)

2,4 (1,3 – 5,6)

0,34

IL-6 (ng/L)

1,8 (1,0 – 3,7)

3,0 (1,2 – 4,5)

0,26

25(OH)D (nmol/L)

56 (± 22)

58 (± 22)

0,74

1,25(OH)2 (pmol/L)

58 (26–90)

53 (34–90)

0,97

Phosphate (mmol/L)

1,2 (± 0,28)

1,2 (± 0,28)

0,46

Calcium (mmol/L)

2,2 (± 0,14)

2,3 (± 0,11)

0,18

FGF-23 (pg/ml)

92 (71 – 163)

130 (68–179)

0,40

  1. BMI Body mass index, eGFR Estimated glomerular filtration rate, PKD Polycystic Kidney Disease
  2. ESA, erythropoiesis-stimulating agents; TSAT, transferrin saturation; CRP, high-sensitivity C-reactive protein; IL-6, interleukin-6; 25(OH)D, 25-hydroxyvitamin D; 1,25(OH)2, 1,25-dihydroxyvitamin D; FGF-23: fibroblast growth factor 23
  3. aValues are presented as median (interquartile range), mean (± SD), or absolute numbers (%). p-values denotes differences between the treatment group and the placebo group. p-values below 0,05 are shown in bold print
  4. bReference values for serum hepcidin-25 (nmol/L; median, 95% reference range) for the general population with mass spectrometry (WCX-TOF MS): men 4.7 (< 0.5–15.5); women 3.8 (< 0.5– 15.4). Reference: www.hepcidinanalysis.com
  5. cReference values for hepcidin-25/ferritin ratio (pmol/µg; median, 95% reference range) for the general population with mass spectrometry (WCX-TOF MS): men, 28,2 (3,1–92,7); pre-menopausal women, 37,6 (3,2– 176,4); post-menopausal women, 42,7 (9,6–150,9). Reference: www.hepcidinanalysis.com