Table 3. The results of univariate and multivariate analysis to determine the variables associated with postoperative pulmonary vascular resistance.

	Simple linear regression analysis		Multiple linear regression analysis
	SRC	p-value	SRC	p-value
Age	0.52	0.02	-0.025	0.9
Obstruction ratio	0.81	0.0002	0.82	0.002
PV score	0.41	0.09

SRC: standardized regression coefficient