Table 4. Derivation of predictive equations.

	Peak variables
	Peak VO2	Maximum work	Max O2 pulse
Initial model	Age at exercise, height, weight, gender, fenestration, dominant ventricle	Age at exercise, height, weight, gender, fenestration, dominant ventricle	Age at exercise, weight, height, gender, dominant ventricle
Covariate removed
Step 1	Dominant ventricle*	Dominant ventricle*	Age at exercise*
Step 2	Age at exercise*	Fenestration*	Dominant ventricle*
Step 3	Fenestration*	Age at exercise*
Covariates in final model	Gender, height, weight	Gender, height, weight	Gender, height, weight
	Anaerobic threshold variables
	VO2 at AT	Work at AT	O2 pulse at AT
Initial model	Age at exercise, height, weight, gender	Ventricular looping, gender, weight, height, age at exercise, dominant ventricle, fenestration	Ventricular looping, gender, weight, height, age at exercise, dominant ventricle, fenestration
Covariate removed
Step 1	Weight*	Dominant ventricle*	Ventricular looping*
Step 2	Age at exercise*	Age at exercise*	Age at exercise*
Step 3		Weight*	Fenestration*
Step 4		Ventricular looping**	Dominant ventricle*
Covariates in final model	Gender, height	Height, gender, fenestration	Gender, height, weight
	Ventilatory equivalents at anaerobic threshold
	VE/VCO2 at AT	VE/VO2 at AT
Initial model	Ventricular looping, weight, height, age at exercise, dominant ventricle, fenestration	Ventricular looping, weight, height, age at exercise, dominant ventricle, fenestration
Covariate removed
Step 1	Height*	Height*
Step 2	Dominant ventricle*	Age at exercise*
Step 3	Age at exercise*	Dominant ventricle*
Covariates in final model	Weight, ventricular looping, fenestration	Weight, ventricular looping, fenestration

^*Removed due to partial R² < 0.02 and p value > 0.05

^**Removed due to p value > 0.05