. Author manuscript; available in PMC: 2015 Jun 1.

Published in final edited form as: J Thorac Cardiovasc Surg. 2013 Sep 24;147(6):1791–1798.e4. doi: 10.1016/j.jtcvs.2013.07.063

Table 3C.

Final Model for Risk Factors Associated with Stage II Hospital Length of Stay Including Only Subjects for Whom PVR Calculations Were Available. (N=253, generalized R²=0.28).

Variable	Hazard ratio (95% CI)	P	Reliability
Site		0.003	95%
Log of Norwood Length of stay in days	1.84 (1.48, 2.30)	<.001	99%
Non-elective reason for timing of stage II	1.51 (1.09, 2.09)	0.013	62%
Pre-stage II cath PVR, Wood units	1.24 (1.07, 1.44)	0.004	69%

PA: pulmonary artery; Echo: echocardiogram; RV: right ventricle: cath: catheterization; PVR: pulmonary vascular resistance; CI: confidence interval