Table 2

Variables associated with IVC diameter and corrected IVC diameter

IVC diameter			BSA corrected IVC diameter			Ideal BSA (BMI 25 kg/m²) Corrected IVC diameter			Height corrected IVC diameter
Variable	Correlation Coefficient	P value	Variable	Correlation Coefficient	P value	Variable	Correlation Coefficient	P value	Variable	Correlation Coefficient	P value
Height	0.35	<0.001	Height	--	--	Height	--	--	Height	--	--
BSA	0.424	<0.001	BSA	--	--	BSA	--	--	BSA	0.245	<0.001
Ideal BSA (BMI 25 kg/m²)	0.35	<0.001	Ideal BSA (BMI 25 kg/m²)	--	--	Ideal BSA (BMI 25 kg/m²)	--	--	Ideal BSA (BMI 25 kg/m²)	--	--
Age	−0.315	<0.001	Age	−0.034	0.63	Age	−0.194	<0.01	Age	−0.247	<0.001
Echocardiographic findings			Echocardiographic findings			Echocardiographic findings			Echocardiographic findings
LVEF	−0.200	0.01	LVEF	−0.192	<0.01	LVEF	−0.112	0.12	LVEF	−0.150	0.03
PA pressure	0.347	<0.001	PA pressure	0.287	<0.001	PA pressure	0.329	<0.001	PA pressure	0.345	<0.001
Laboratory values			Laboratory values			Laboratory values			Laboratory values
Log NT-proBNP	0.102	0.16	Log NT-proBNP	0.247	<0.01	Log NT-proBNP	0.072	0.33	Log NT-proBNP	0.085	0.25
Creatinine	0.139	0.05	Creatinine	0.080	0.26	Creatinine	0.148	0.04	Creatinine
eGFR	0.044	0.54	eGFR	0.024	0.73	eGFR	0.007	0.92	eGFR	0.022	0.76
Sodium	−0.127	0.07	Sodium	−0.080	0.26	Sodium	−0.087	0.22	Sodium	−0.104	0.14
Potassium	0.014	0.85	Potassium	0.005	0.94	Potassium	−0.026	0.71	Potassium	−0.012	0.87
Haemoglobin	−0.091	0.21	Haemoglobin	−0.159	0.03	Haemoglobin	−0.139	0.06	Haemoglobin	−0.123	0.09
Vital signs			Vital signs			Vital signs			Vital signs
Systolic BP	−0.079	0.27	Systolic BP	−0.034	0.63	Systolic BP	−0.066	0.35	Systolic BP	−0.073	0.30
Diastolic BP	0.140	0.05	Diastolic BP	0.003	0.97	Diastolic BP	0.033	0.64	Diastolic BP	0.076	0.29
Heart rate	0.101	0.16	Heart rate	0.033	0.64	Heart rate	0.051	0.47	Heart rate	0.073	0.31

Bolded values are significant at p<0.05. Linear relationship assessed using Pearson correlation coefficient.
BMI, body mass index; BP, blood pressure; BSA, body surface area; eGFR, estimated glomerular filtration rate; IVC, inferior vena cava; LVEF, left ventricular ejection fraction; NT-proBNP, N-terminal B-type natriuretic peptide; PA, pulmonary arterial.