Table 2.

Univariate and stepwise multivariate regression of factors that correlate with hemoglobin levels

	Univariate		Multivariate
	β	p value	β	p value
Age	-0.36	<0.01
Male sex	0.26	<0.01	0.26	<0.01
Body mass index	0.16	0.03	0.16	0.02
Diastolic blood pressure	0.25	<0.01
Pulse pressure	-0.19	0.01
Resistive index	-0.40	<0.01	-0.29	<0.01
Estimated GFR	0.35	<0.01	0.25	<0.01
Qualitative urine protein	-0.26	<0.01
RAAS inhibitors	-0.18	0.02
Calcium channel blockers	-0.24	<0.01

GFR, glomerular filtration rate; RAAS, renin-angiotensin-aldosterone system.