Table 4

Regression analysis demonstrating the association between the ratio of VO₂ max/predicted VO₂ and various potential predictors, in the entire study population

	Univariate analysis
Variable	β	p Value
Clinical
Age	−0.16	0.3
Gender	−0.10	0.4
Body surface area	−0.20	0.2
Hypertension	−0.002	0.9
β Blockers	−0.09	0.5
Calcium channel blockers	−0.1	0.4
New York Heart Association class	−0.1	0.5
Resting heart rate	−0.06	0.7
Resting systolic blood pressure	−0.004	0.9
Resting diastolic blood pressure	0.017	0.9
Echocardiography
Deceleration time	0.16	0.3
E/E′ ratio	−0.08	0.7
Myocardial performance index	0.03	0.9
LV end-diastolic stiffness	−0.20	0.4
Resting peak LVOT gradient	−0.11	0.5
Provokable (pre-stress) peak LVOT gradient (amyl nitrite or Valsalva)	−0.12	0.5
Post stress peak LVOT gradient	−0.20	0.4
Resting mitral regurgitation	−0.06	0.7
Post-stress mitral regurgitation	−0.06	0.7
Cardiac magnetic resonance
Basal end-diastolic interventricular septal thickness	−0.2	0.2
Left atrial area index	−0.17	0.3
Left ventricular end-systolic index	0.18	0.3
Left ventricular end-diastolic index	0.1	0.5
Left ventricular ejection fraction	−0.05	0.8
Left ventricular mass index	−0.09	0.6
Degree of delayed hyperenhancement	−0.16	0.3
Ascending aortic distensibility	0.31	0.03
Pulse wave velocity	−0.32	0.03

Because aortic stiffness was the only significant variable, multivariable analysis was not performed.
LVOT, left ventricular outflow tract.