Table 2. Determinants of renal resistive index by univariate and multivariate analyses in all patients .

	Univariate				Multivariate
	Unstandardized coefficient β	SD	95% CI	p value	Unstandardized coefficient β	SD	95% CI	p value
Age (year)	0.004	< 0.001	(0.003, 0.004)	< 0.001	0.002	< 0.001	(0.001, 0.003)	< 0.001
Male gender (%)	-0.02	0.01	(-0.04, 0.002)	0.08	-
Smoking history (%)	-0.01	0.01	(-0.04, 0.01)	0.27	-
Diabetes mellitus (%)	0.06	0.01	(0.03, 0.08)	< 0.001	0.03	0.009	(0.01, 0.05)	0.001
Hypertension (%)	0.04	0.01	(0.01, 0.06)	0.002	0.003	0.009	(-0.02, 0.02)	0.76
Coronary artery disease (%)	0.03	0.02	(-0.003, 0.06)	0.08	-
Cerebrovascular disease (%)	0.04	0.02	(0.006, 0.08)	0.02	0.01	0.01	(-0.01, 0.03)	0.42
Pulse pressure (mmHg)	0.004	< 0.001	(0.003, 0.004)	< 0.001	< 0.001	< 0.001	(-0.001, 0.001)	0.59
Heart rate (beats/min)	-0.002	< 0.001	(-0.002, -0.001)	< 0.001	< 0.001	< 0.001	(-0.001, < 0.001)	0.23
Body mass index (kg/m2)	0.001	0.001	(-0.002, 0.004)	0.54	-
Antihypertensive medication
ACEI	-0.02	0.01	(-0.05, 0.008)	0.17	-
ARB	0.03	0.01	(0.01, 0.05)	0.002	-0.01	0.008	(-0.03, 0.004)	0.14
Beta blocker	0.03	0.01	(0.009, 0.05)	0.005	0.02	0.008	(< 0.001, 0.03)	0.05
Calcium channel blocker	0.02	0.01	(-0.006, 0.04)	0.15	-
Diuretics	0.02	0.01	(0.002, 0.05)	0.04	0.01	0.008	(-0.003, 0.03)	0.10
Alfa blocker	0.06	0.03	(0.01, 0.11)	0.02	0.03	0.02	(-0.008, 0.08)	0.12
Laboratory parameters
Fasting glucose (mg/dL)	< 0.001	< 0.001	(< 0.001, < 0.001)	0.24	-
Triglyceride (mg/dL)	-3.62	< 0.001	(< 0.001, < 0.001)	0.58	-
Total cholesterol (mg/dL)	< 0.001	< 0.001	(< 0.001, < 0.001)	0.10	-
Hematocrit (%)	-0.007	0.001	(-0.009, -0.005)	< 0.001	-0.003	0.001	(-0.004, -0.002)	< 0.001
Brachial pulse pressure index	0.92	0.07	(0.79, 1.05)	< 0.001	0.53	0.11	(0.32, 0.74)	< 0.001

ACEI, angiotensin-converting-enzyme inhibitor; ARB, angiotensin II receptor blocker; CI, confidence interval; SD, standard deviation.