Central wave reflection is associated with peripheral arterial resistance in addition to arterial stiffness in subjects without antihypertensive medication

Table 4 Regression analysis for determinants of augmentation index

Augmentation index	b	beta	95 % Confidence interval of beta		P value
			Lower	Upper
Male subjects, R² = 0.580, p < 0.001
Age	0.563	0.577	0.460	0.671	<0.001
Systemic vascular resistance	0.018	0.437	0.354	0.631	<0.001
Stroke volume	0.160	0.185	0.068	0.314	0.003
Weight	-0.129	-0.131	-0.270	-0.032	0.013
Female subjects, R² = 0.621, p < 0.001
Age	0557	0.557	0.474	0.670	<0.001
Systemic vascular resistance	0.011	0.295	0.180	0.400	<0.001
Height	-0.490	-0.255	-0.355	-0.161	<0.001
Stroke volume	0.154	0.177	0.067	0.302	0.002
Smoking	0.209	0.088	0.019	0.203	0.018

Linear regression analysis with backward elimination: haemodynamic variables, subject characteristics and laboratory values used as explanatory variables for augmentation index. Variables used: Systemic vascular resistance, the common logarithm of pulse wave velocity, stroke volume, heart rate, age, height, weight, smoking (in pack years); plasma LDL, triglyceride, cystatin-C and fasting glucose concentrations; LDL, low density lipoprotein

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