Table 5. Multivariate Cox regression analyses of three-year mortality adjusted for confounding variables.

	Multivariate regression model 01		Multivariate regression model 02		Multivariate regression model 03
	p-value	HR (95% CI)	p-value	HR (95% CI)	p-value	HR (95% CI)
Bicuspid AS	0.151	0.62 (0.33-1.19)	0.398	0.75 (0.39-1.46)	0.666	0.86 (0.44-1.70)
Age, years	0.600	1.01 (0.96-1.07)	0.380	0.98 (0.92-1.03)	0.373	0.97 (0.92-1.03)
STS score, per 1%	–	–	<0.001	1.09 (1.06-1.12)	<0.001	1.09 (1.06-1.13)
Previous stroke	–	–	–	–	0.025	3.01 (1.15-7.91)
Left ventricular mass, per 1 g	–	–	–	–	0.372	1.00 (1.00-1.01)
Multivariate regression model 01: multivariate Cox regression model adjusted for age. Multivariate regression model 02: multivariate Cox regression model adjusted for age and STS score. Multivariate regression model 03: multivariate Cox regression model adjusted for age, STS score, previous stroke and left ventricular mass. CI: confidence interval; HR: hazard ratio; STS: Society of Thoracic Surgeons