Table 2.

Correlation between PA clot load and other variables

Variables	PAOI/PAOI class	P value
	Correlation coefficient
Clinical characteristic, N (%)
Age	−0.097	0.326
Age <60 years	0.144	0.144
Male gender	−0.097	0.326
Comorbid disease, N (%)
Ischemic heart disease	−0.155	0.117
Congestive heart failure	−0.12	0.223
Myocardial infarction	0.047	0.638
Chronic obstructive pulmonary disease	−0.068	0.491
Diabetes mellitus	−0.088	0.376
Hypertension	−0.064	0.517
Hyperlipidemia	0.098	0.324
Any renal disease	0.157	0.113
Kidney transplantation history	0.092	0.353
Malignancy	−0.019	0.849
Coagulopathy	0.01	0.924
Pulmonary hypertension	0.158	0.109
Echocardiography findings
Pulmonary artery pressure	0.306	0.002
PAP>=30	0.180	0.067
Right ventricular systolic dysfunction	0.259	0.008
Clinical symptoms and signs at presentation, N (%)
Chest pain	0.195	0.048
Dyspnea	0.028	0.781
Syncope	0.124	0.208
Hemoptysis	−0.041	0.677
Heart rate>100/min	0.208	0.034
O2 saturation	−0.169	0.086
O2 saturation<90%	0.466	<0.001
PAO2 <60%	0.358	<0.001
Pulmonary embolism severity index	0.235	0.017
Length of hospital stay, days	−0.160	0.104
Length of ICU stay, days	−0.129	0.191
Mechanical ventilation	−0.175	0.076
Time to diagnosis of PTE	−0.077	0.44

Correlation coefficients were calculated by using the Pearson correlation coefficients and Spearman’s rho correlation coefficients.

PAOI, pulmonary artery obstruction index