Table 4. The results of univariate and multivariate analysis to determine the variables associated with follow-up pulmonary vascular resistance.

	Simple linear regression analysis		Multiple linear regression analysis
	SRC	p-value	SRC	p-value
Age	0.57	0.02	0.086	0.7
Obstruction ratio	0.78	0.0002	0.72	0.007
PV score	0.42	0.09

SRC: standardized regression coefficient