TABLE E5.

Sensitivity analysis showing multilevel regression model, with random effects by institution, using only variables with no missing data (n = 2432)

Variable	Odds ratio*	P value	95% Confidence interval
Diameter (mm)	1.25	<.001	1.23–1.28
Age (y)	0.98	<.001	0.97–0.98
Male sex	1.04	.716	0.81–1.36

^*Odds ratio >1 indicates increased likelihood of combined aortic valve replacement and ascending aortic intervention. Odds ratio <1 indicates increased likelihood of isolated aortic valve replacement.