Table 3.

Multivariable linear regression analysis to evaluate independent associations between log-transformed total FGF2 3 (independent variable) and hemoglobin SDS (dependent variable). VIF: variance inflation factor; FGF23: fibroblast growth factor 23; eGFR: estimated glomerular filtration rate; EPO: erythropoietin; ERFE: erythroferrone

Model	Independent variables	Coefficient	p-value	VIF	R 2
1	Log Total FGF23	−3.496	<0.001	1.37	0.40
	eGFR	0.016	0.07	1.37
2	Log Total FGF23	−4.354	<0.001	1.02	0.40
	Iron	−0.004	0.52	1.06
	Ferritin	−0.001	0.50	1.34
	Hepcidin	−0.002	0.77	1.26
3	Log Total FGF23	−2.930	0.001	1.06	0.42
	Log EPO	−1.924	0.006	1.61
	Log ERFE	−0.199	0.61	1.55
4	Log Total FGF23	−3.152	<0.001	1.45	0.45
	Phosphate SDS	−0.104	0.48	1.06
	Calcium	0.945	0.021	1.52
5	Log Total FGF23	−4.303	<0.001	1.11	0.38
	TNF-α	−0.020	0.40	1.48
	IL-8	0.008	0.24	1.39
6	Log Total FGF23	−3.301	<0.001	1.07	0.30
	Mycophenolate Dose	−0.002	0.06	1.07