Table 3.

Multivariable Cox Regression Model for Norwood Length of stay^* (n=329, R²=0.20)

		Hazard Ratio (95% CI)	p value
Center			0.01
Genetic syndrome/other anomalies			0.001
Yes		1.63 (1.21, 2.19)
No		Ref
Unknown		1.65 (1.18, 2.30)
TPS			<.001
Class 1 Optimal		0.44 (0.31, 0.63)
Class 2 Adequate		0.35 (0.22, 0.56)
Class 3 Inadequate		Ref
Pre-Norwood complication			0.03
Yes		1.33 (1.02, 1.72)
No		Ref

^*Excluding data of subjects who died or underwent cardiac transplant during the hospitalization.

CI: confidence intervals, TPS: technical performance score