Table 2. Subgroup analysis of patients aged <55 years.

	Using absolute echocardiographic measurement		Indexed to BSA		Indexed to height
	OR (95% CI)	P value	OR (95% CI)	P value	OR (95% CI)	P value
Hypertension	0.16 (0.04–0.58)	0.005	0.162 (0.04–0.60)	0.006	0.18 (0.05–0.62)	0.007
ARD	1.18 (1.02–1.37)	0.03	1.39 (1.05–1.85)	0.02	1.31 (1.03–1.66)	0.03
Height	0.93 (0.86–1.00)	0.06	-		-

OR: odds ratio; CI: confidence interval; ARD: aortic root dimension.