TABLE 3

Relationships between changes in peak oxygen consumption (V′_O₂) and in 6-min walk distance (6MWD) as dependent variables, and changes in pulmonary vascular resistance (PVR) and pulmonary artery compliance (C_pa; calculated according to the pulse-pressure method)

	Change in peak V′_O₂		Change in 6MWD
	β estimate^# (95% CI)	p-value	β estimate^# (95% CI)	p-value
PVR	−0.39 (−0.74– −0.05)	0.02	−0.42 (−0.79– −0.04)	0.03
Gender	0.10 (−1.10–1.31)	0.80	−0.36 (−1.03–0.31)	0.28
Weight	−0.13 (−0.51–0.25)	0.16	0.42 (−0.14–0.84)	0.14
Height	0.46 (−0.13–1.05)	0.12	0.11 (−0.56–0.79)	0.73
Age	0.09 (−0.25–0.44)	0.58	−0.06 (−0.44–0.33)	0.76
C_pa	−0.02 (−0.43–0.49)	0.90	0.16 (−0.24–0.55)	0.42
Gender	0.83 (−20.13–21.53)	0.92	−0.39 (−1.15–0.37)	0.30
Weight	−0.52 (−0.89– −0.07)	0.02	0.19 (−0.21–0.59)	0.34
Height	0.52 (−0.15–1.19)	0.13	0.26 (−0.49–1.00)	0.50
Age	−0.01 (−0.38–0.36)	0.95	−0.13 (−0.54–0.27)	0.36

Adjustment was made to selected morphometric variables that may influence exercise capacity. Bold type represents statistical significance. ^#: coefficient that compares the strength of the effect of each individual independent variable (i.e. PVR, C_pa, gender, weight, height and age) to the dependent variables (i.e. peak V′_O₂ and 6MWD).