Table 1.

Multivariable Cox regression model for time to first extubation^* (n=324, R²=0.23).

		Hazard ratio	95% CI	p
Center				<.001
Gestational age, (months)		0.88	0.82, 0.95	<.001
Hispanic				0.03
Yes		1.40	1.04, 1.90
No		Ref
Genetic syndrome/other anomalies				0.03
Yes		1.51	1.12, 2.06
No		Ref
Unknown		1.19	0.84, 1.66
TPS				0.02
Class 1-Optimal		0.59	0.41, 0.85
Class 2-Adequate		0.62	0.38, 1.00
Class 3- Inadequate		Ref

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

CI: confidence interval, TPS: technical performance score