Table 3.

Correlation analysis of right heart size and clinical parameters

	Right atrial area				Right ventricular area
	n	pearson’s R	p-value		n	pearson’s R	p-value
Univariate analysis
Age	54	0.193	0.162		54	- 0.048	0.209
Body mass index	54	0.181	0.190		54	0.733	0.129
6-min walking distance	53	- 0.108	0.441		53	- 0.121	0.387
NT-proBNP	53	0.539	< 0.001	*	53	0.538	< 0.001	*
Echocardiography
Systolic pulmonary arterial pressure	54	0.307	0.024	*	54	0.567	< 0.001	*
Right atrial area		–			54	0.703	< 0.001	*
Right ventricular area	54	0.703	< 0.001	*		–
Tricuspid annular plane systolic excursion	54	- 0.128	0.356		54	- 0.082	0.554
Cardiopulmonary exercise testing
Peak oxygen consumption (V’O2)	54	0.042	0.736		54	0.051	0.713
Peak oxygen consumption/kg (V’O2/kg)	54	- 0.199	0.149		54	- 0.227	0.099
Right heart catheter
rest
Mean pulmonary arterial pressure	54	0.176	0.202		54	0.544	< 0.001	*
Cardiac Output	54	- 0.028	0.839		54	- 0.052	0.709
Cardiac Index	54	- 0.209	0.129		54	- 0.281	0.040	*
Pulmonary arterial wedge pressure	54	0.025	0.857		54	- 0.101	0.467
Pulmonary vascular resistance	54	0.175	0.206		54	0.508	< 0.001	*
Stroke volume index	54	−0.244	0.076		54	−0.301	0.027	*
exercise
Mean pulmonary arterial pressure	54	0.097	0.486		54	0.419	0.002	*
Cardiac Output	54	- 0.177	0.200		54	- 0.223	0.104
Cardiac Index	54	- 0.344	0.011	*	54	- 0.427	0.001	*
∆ CI peak	54	- 0.313	0.021	*	54	- 0.376	0.005	*
Stroke volume index	54	−0.264	0.054		54	−0.407	0.002	*
Lung function / Diffusing capacity
DLCOc SB	48	- 0.052	0.723		48	- 0.003	0.982
DLCOc /VA	48	0.176	0.231		48	0.137	0.352

CI = Cardiac Index, NT-proBNP = N-terminal pro brain natriuretic peptide, DLCOc SB = diffusion capacity transfer factor, DLCOc /VA = diffusion capacity transfer coefficient

* = significant at level 0.05