FGF23 is correlated with iron status but not with inflammation and decreases after iron supplementation: a supplementation study

Table 1 Anthropometric and biochemical variables at baseline and after iron supplementation

Dependent	Baseline	After supplementation	Paired t-test
Variable	*n= 79*	*n= 79*	P-Value
Age (y)	5.48 (0.32)	5.81 (0.32)	-
Sex (F/M)	47/32	47/32	-
Height (cm)	105.6 (6.8)	107.7 (6.5)	≤0.0001
Weight (kg)	15.6 (2.2)	16.3 (2.2)	≤0.0001
BMI (kg/m²)	13.9 (1.2)	14.0 (1.2)	0.2
ZnPP (μmol/mol haem)*	61.9 (32.4, 118.3)	24.7 (15.8, 38.5)	≤0.0001
Hb (g/dL)	10.3 (1.3)	11.3 (1.0)	≤0.0001
Ferr (ng/mL)*	26.6 (12.3, 57.6)	46.9 (28.6, 76.9)	≤0.0001
FGF23 (RU/mL)*	96.0 (38.4, 240.4)	82.8 (47.1, 145.7)	0.1
CRP (mg/dL)*	2.45 (1.00, 6.01)	1.99 (0.83, 4.78)	0.1

Data shown as mean (SD) or geometric mean (−1SD, +1SD) for skewed variables (*).

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