The Association between the Pulmonary Arterial Obstruction Index and Atrial Size in Patients with Acute Pulmonary Embolism

Table 2

Correlation between PAOI and radiologic parameters in computed tomography (CT) angiography.

	PAOI
	Spearman’s correlation coefficient (ρ)	P Value
LA Long Diameter, cm	-0.205	0.152
LA Short Diameter, cm	-0.380	0.006
LA Height, cm	-0.483	<0.001
LA Area, cm^2	-0.449	0.001
LA Volume, cm^3	-0.472	0.001
RA Long Diameter, cm	-00.089	0.538
RA Short Diameter, cm	.334	0.018
RA Height, cm	-0.144	0.320
RA Area, cm^2	0.041	0.776
RA Volume, cm^3	-0.015	0.916
RA to LA Long Diameter Ratio	0.05	0.68
RA to LA Short Diameter Ratio	0.50	<0.01
RA to LA Height ratio	0.25	0.08
RA to LA Area Ratio	0.44	<0.01
RA to LA Volume ratio	0.39	<0.01
Reflux Grade, n	-0.033	0.822

Abbreviations: LA: left atrium; PAOI: pulmonary artery obstruction index; RA: right atrium.