Table 2.

Correlation analysis of SHR, ABG and HbA1c with established markers of PAH severity

Variables	SHR		ABG		HbA1c
	Coefficient (r)	P value	Coefficient (r)	P value	Coefficient (r)	P value
WHO-FC	0.196	< 0.001	0.267	< 0.001	0.150	< 0.001
6MWD	− 0.187	< 0.001	− 0.287	< 0.001	− 0.212	< 0.001
ln (NT-proBNP)	0.181	< 0.001	0.384	< 0.001	0.339	< 0.001
Pericardial effusion	0.094	0.019	0.220	< 0.001	0.220	< 0.001
RAP	0.067	0.097	0.259	< 0.001	0.259	< 0.001
mPAP	0.022	0.589	0.053	0.188	0.030	0.459
PVR	0.163	< 0.001	0.202	< 0.001	0.205	< 0.001
Cardiac index	− 0.085	0.035	− 0.304	< 0.001	− 0.333	< 0.001
SVI	− 0.105	0.009	− 0.341	< 0.001	− 0.355	< 0.001
SVO2	− 0.134	0.001	− 0.324	< 0.001	− 0.302	< 0.001

ABG, admission blood glucose; HbA1c, hemoglobin A1c; mPAP, mean pulmonary arterial pressure; ln, logarithmically transformed; NT-proBNP, N-terminal pro-brain natriuretic peptide; PAH, pulmonary arterial hypertension; PVR, pulmonary vascular resistance; RAP, right atrial pressure; 6MWD, 6-min walk distance; SHR, stress hyperglycemia ratio; S_VO₂, mixed venous oxygen saturation; SVI, stroke volume index; WHO-FC, World Health Organization functional class