Table 3.

Multivariable Analysis of Peak VO2 (mL/kg/min) as a Continuous Variable.

Variable	Coefficient	95% Confidence Interval	Partial R-square	P-value
Age	−0.13	(−0.14, −0.11)	0.12	<0.0001
BMI	−0.16	(−0.18, −0.13)	0.07	<0.0001
CPX mode (treadmill vs. bike)	−2.5	(−3.2, −1.9)	0.02	<0.0001
Diabetes	−1.2	(−1.5, −0.8)	0.02	<0.0001
ECG vent. cond.			0.03 (overall)	<0.0001 (overall)
IVCD	−1.3	(−1.8, −0.8)
LBBB	−0.5	(−1.0, −0.1)
Paced	−1.5	(−1.9, −1.1)
RBBB	−1.6	(−2.5, −0.8)
Gender	−2.1	(−2.5, −1.7)	0.06	<0.0001
LVEF	0.07	(0.05, 0.09)	0.02	<0.0001
NYHA Class (II vs. III/IV)	−2.0	(−2.4, −1.7)	0.06	<0.0001
PVD	−2.0	(−2.6, −1.4)	0.02	<0.0001
Race			0.06 (overall)	<0.0001 (overall)
African Amer.	−2.2	(−2.5, −1.8)
Other	−1.1	(−1.8, −0.4)
Region			0.03 (overall)	<0.0001 (overall)
West USA	0.7	(0.1, 1.2)
Midwest USA	0.5	(0.2, 0.9)
Northeast USA	−0.8	(−1.3, −0.2)
Canada	−1.1	(−1.7, 0.5)
France	2.3	(1.0, 3.6)

Reference categories for categorical variables: sex = male, diabetes = non-diabetics, PVD = non-PVD, region = South USA, race = Caucasian, NYHA Class = Class II, CPX mode = treadmill, Overall model R² = 0.39.