Table 3. Univariate and multivariate linear regression analysis of the aortic stiffness index for the myocardial work parameters.

Variables	Univariable				Multivariable*
	Standardized beta	95% CI	P value		Standardized beta	95% CI	P value
GWI	0.20	0.33 to 29.32	0.045		0.25	2.37 to 34.73	0.025
GCW	0.21	2.00 to 46.41	0.033		0.21	0.07 to 48.32	0.049
GWW	0.54	7.30 to 13.68	<0.001		0.37	3.22 to 10.99	<0.001
GWE	−0.54	−0.56 to −0.29	<0.001		−0.36	−0.45 to −0.13	0.001

Univariate linear regression analysis of the aortic stiffness index and myocardial work parameters. *, multivariate linear regression analysis was adjusted for the conventional risk factors of age, sex, hypertension, systolic blood pressure, and echocardiographic parameters related to myocardial work parameters (E/A, E/e' average, left ventricular mass index, global longitudinal strain, ejection fraction). GWI, global work index; GCW, global constructive work; GWW, global wasted work; GWE, global work efficiency; E, peak early diastolic mitral flow velocity; A, late diastolic mitral inflow velocity; e', peak early diastolic mitral annular velocity.