Table 7.

Multivariate analysis to examine the independent effect of each variable on the occurrence of RPI.

Variables	Univariate analysis			Multivariate analysis
	Odds ratio	95% CI	p value	Odds ratio	95% CI	p value
Pre-BPA Pp	1.159	1.083–1.2040	< 0.001
Post-BPA Pp	1.156	1.082–1.235	< 0.001
Post-BPA Pd	1.191	1.106–1.284	< 0.001	1.139	1.053–1.231	0.001
Pd increase	1.185	1.097–1.280	< 0.001	1.126	1.033–1.229	0.007
Pre-BPA MLD	0.689	0.483–0.982	0.040

BPA, balloon pulmonary angioplasty; MLA, minimal lumen diameter; Pd, mean pulmonary arterial pressure distal to the stenosis measured by the pressure wire sensor; Pp, mean pulmonary arterial pressure proximal to the stenosis measured by the guiding catheter.