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Table 3 % change in terms of variables relevant to the 6H syndrome

From: The differential effect of modern intravenous iron on fibroblast growth factor 23 and phosphate in non-dialysis dependent CKD – the exploratory randomized controlled double-blind ExplorIRON-CKD study

Variable

Iron group (n)

Mean/Median (SD/IQR)

p-value

iFGF23

Baseline to 1–2 days after 1st infusion

FDI (14)

3.0 (28.9)

 

FCM (11)

146.1 (94.9)

< 0.001

Baseline to 2 weeks after 1st infusion

FDI (13)

11.9 (40.6)

 

FCM (10)

24.3 (52.7)

0.284

Baseline to 1 month after 1st infusion (2nd infusion)

FDI (12)

6.5 (30.3)

 

FCM (11)

17.1 (32.3)

0.566

Baseline to 1–2 days after 2nd infusion

FDI (9)

3.2 (28.9)

 

FCM (10)

235.1 (296.1)

0.001

Baseline to 2 months after 1st infusion

FDI (12)

15.7 (104.7)

 

FCM (10)

8.1 (62.1)

0.497

Phosphate

Baseline to 1–2 days after 1st infusion

FDI (14)

-6.5 (15.1)

 

FCM (11)

-3.3 (18.2)

0.893

Baseline to 2 weeks after 1st infusion

FDI (13)

-1.6 (20.6)

 

FCM (10)

-11.0 (17.8)

0.077

Baseline to 1 month after 1st infusion (2nd infusion)

FDI (12)

-7.5 (25.1)

 

FCM (11)

-6.1 (14.3)

1.000

Baseline to 1–2 days after 2nd infusion

FDI (9)

1.8 (30.3)

 

FCM (10)

-14.9 (14.7)

0.013

Baseline to 2 months after 1st infusion

FDI (13)

9.2 (25.1)

 

FCM (10)

-13.2 (18.5)

0.131

Calcium a

Baseline to 1–2 days after 1st infusion

FDI (14)

1.5 (2.7)

 

FCM (11)

0.4 (2.5)

0.297

Baseline to 2 weeks after 1st infusion

FDI (13)

0.4 (3.4)

 

FCM (10)

-1.8 (3.1)

0.131

Baseline to 1 month after 1st infusion (2nd infusion)

FDI (12)

0.5 (2.9)

 

FCM (11)

0.3 (3.8)

0.916

Baseline to 1–2 days after 2nd infusion

FDI (9)

1.5 (2.2)

 

FCM (10)

-1.0 (2.4)

0.035

Baseline to 2 months after 1st infusion

FDI (12)

0.5 (4.7)

 

FCM (10)

1.5 (3.2)

0.566

Fractional excretion of phosphate

Baseline to 1–2 days after 1st infusion

FDI (11)

-7.1 (26.2)

 

FCM (10)

6.4 (27.9)

0.314

Baseline to 2 weeks after 1st infusion

FDI (12)

-3.7 (18.1)

 

FCM (10)

-5.0 (28.9)

0.872

Baseline to 1 month after 1st infusion (2nd infusion)

FDI (9)

-2.7 (13.0)

 

FCM (10)

3.6 (33.9)

0.661

Baseline to 1–2 days after 2nd infusion

FDI (9)

-8.2 (31.6)

 

FCM (10)

13.0 (48.4)

0.182

Baseline to 2 months after 1st infusion

FDI (10)

5.0 (24.8)

 

FCM (10)

0.3 (28.0)

1.000

1,25 (OH)2 Vitamin D a

Baseline to 1–2 days after 1st infusion

FDI (14)

-2.8 (14.2)

 

FCM (11)

-15.6 (12.8)

0.027

Baseline to 2 weeks after 1st infusion

FDI (13)

-14.7 (14.6)

 

FCM (10)

-18.1 (14.9)

0.580

Baseline to 1 month after 1st infusion (2nd infusion)

FDI (12)

-9.8 (16.5)

 

FCM (11)

-5.4 (27.2)

0.642

Baseline to 1–2 days after 2nd infusion

FDI (9)

-4.7 (13.0)

 

FCM (10)

-24.9 (22.5)

0.031

Baseline to 2 months after 1st infusion

FDI (12)

-5.4 (30.5)

 

FCM (10)

-5.3 (29.1)

0.933

25 (OH)2 Vitamin D

Baseline to 1–2 days after 1st infusion

FDI (14)

1.6 (14.0)

 

FCM (11)

-3.5 (17.5)

0.267

Baseline to 2 weeks after 1st infusion

FDI (13)

5.8 (17.7)

 

FCM (10)

-0.3 (10.6)

0.483

Baseline to 1 month after 1st infusion (2nd infusion)

FDI (12)

-11.0 (28.8)

 

FCM (11)

-7.1 (26.0)

0.880

Baseline to 1–2 days after 2nd infusion

FDI (9)

0.8 (20.0)

 

FCM (10)

-8.5 (21.7)

0.549

Baseline to 2 months after 1st infusion

FDI (12)

-1.0 (48.8)

 

FCM (10)

-3.0 (25.7)

0.923

24(R), 25 (OH)2 Vitamin D

Baseline to 1–2 days after 1st infusion

FDI (14)

0.0 (7.7)

 

FCM (11)

-8.3 (14.3)

0.085

Baseline to 2 weeks after 1st infusion

FDI (13)

0.0 (7.3)

 

FCM (10)

12.0 (21.1)

0.067

Baseline to 1 month after 1st infusion (2nd infusion)

FDI (12)

-4.2 (29.3)

 

FCM (11)

13.5 (37.5)

0.695

Baseline to 1–2 days after 2nd infusion

FDI (9)

-3.0 (21.6)

 

FCM (10)

6.3 (27.8)

0.842

Baseline to 2 months after 1st infusion

FDI (12)

0.0 (48.4)

 

FCM (10)

-4.1 (26.8)

0.923

PTH a

Baseline to 1–2 days after 1st infusion

FDI (14)

-7.8 (22.0)

 

FCM (11)

-6.9 (25.4)

0.927

Baseline to 2 weeks after 1st infusion

FDI (13)

2.9 (30.8)

 

FCM (10)

19.6 (32.9)

0.226

Baseline to 1 month after 1st infusion (2nd infusion)

FDI (12)

-12.1 (32.0)

 

FCM (11)

13.6 (27.7)

0.054

Baseline to 1–2 days after 2nd infusion

FDI (9)

-3.7 (29.5)

 

FCM (10)

-5.0 (24.3)

0.913

Baseline to 2 months after 1st infusion

FDI (12)

1.8 (36.7)

 

FCM (10)

-1.6 (28.1)

0.810

  1. a variables characterised by asterisk are described as mean (SD); the remaining variables are described as median (IQR) based on distribution