Table 4.

Multivariate linear regression analysis for peak VO₂.

Variables	Beta	95% of CI	p value
RV end-diastolic volume index	−0.35	(−0.10, −0.008)	0.02
Mean pulmonary artery pressure	0.01	(−031, 0.34)	0.91
Cardiac output	0.15	(−0.75, 2.33)	0.31
Qp/Qs	0.20	(−1.05, 4.28)	0.23
ASD diameter	−0.05	(−0.37, 0.26)	0.74
RV FAC	0.08	(−0.29, 0.60)	0.51
TAPSE	−0.05	(−0.62, 0.45)	0.76
S	0.20	(−0.30, 0.60)	0.16

ASD = atrial septal defect; CI = confidence interval; FAC = fractional area change; Qp/Qs = pulmonary to systemic flow ratio; RV = right ventricular; S = tricuspid annular systolic velocity; TAPSE = tricuspid annular plane systolic excursion; VO₂ = oxygen uptake.