Table 4.

Multiple linear regression analysis with erythropoietin resistance index as dependent variable

Model	Unstandardized coefficients		Standardized coefficients	t	P value
	B	SE	Beta
(Constant)	39.506	7.317		5.399	0.000
Age	−0.115	0.054	−0.146	−2.116	0.036
BMI	−0.395	0.132	−0.207	−2.999	0.003
URR	−20.017	8.227	−0.168	−2.433	0.016
Albumin	−0.047	1.127	−0.003	−0.041	0.967
Serum ferritin	−0.002	0.002	−0.076	−1.129	0.260

BMI, body mass index; URR, urea reduction ratio; SE, standard error.