Table 4 Multivariate analyses of renal anemia-related parameters associated with serum fraction of human non-mercaptalbumin [f(HNA)].

	Model 1		Model 2		Model 3		Model 4
	β	p	β	p	β	p	β	p
Age	0.200	0.014	0.198	0.017	0.200	0.014	0.201	0.015
Gender	−0.043	0.633	−0.044	0.628	−0.029	0.749	−0.043	0.634
Body mass index	0.120	0.155	0.121	0.155	0.116	0.1703	0.121	0.156
eGFR	−0.238	0.009	−0.237	0.009	−0.310	0.003	−0.236	0.010
Hemoglobin	−0.346	<0.001	−0.343	<0.001	−0.371	<0.001	−0.343	<0.001
Ferritin	0.200	0.019	0.209	0.031	0.231	0.009	0.199	0.022
Transferrin saturation	—	—	−0.018	0.851	—	—	—	—
Use of ESA	—	—	—	—	0.147	0.167	—	—
Iron supplementation	—	—	—	—	—	—	−0.013	0.871
R²	0.356 (p < 0.001)		0.357 (p < 0.001)		0.369 (p < 0.001)		0.357 (p < 0.001)

eGFR: estimated glomerular filtration rate, ESA: erythropoiesis-stimulating agent, β: standardized correlation coefficient, R²: multiple coefficient of determination

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