Table 5.

Factors associated with conduit reintervention (n=61)

Variable	Univariable analysis			Multivariable analysis
	HR (95% CI)	p-value		HR (95% CI)	p-value
Age at operation (mo)	0.87 (0.81–0.93)	<0.001		0.92 (0.82–1.03)	0.175
Weight at operation (kg)	0.76 (0.67–0.87)	<0.001
Prematurity	0.63 (0.28–1.38)	0.252
Previous palliative cardiac surgery	0.30 (0.18–0.52)	0.001		0.44 (0.18–1.06)	0.068
Chromosomal abnormality	0.71 (0.36–1.42)	0.341
Conduit diameter, z-score	0.59 (0.42–0.84)	0.003		0.57 (0.40–0.83)	0.003
Concomitant pulmonary arterioplasty	0.73 (0.42–1.25)	0.253
Type of conduit	0.78 (0.61–0.98)	0.038		1.05 (0.82–1.03)	0.742
Contegra conduit	Reference
Valved PTFE conduit	2.33 (1.28–4.24)	0.005
Valveless PTFE	2.43 (1.13–5.19)	0.021
Hancock valved conduit	1.10 (0.37–3.30)	0.857
Primary cardiac diagnosis	1.21 (0.93–1.34)	0.225
Cardiopulmonary bypass time	1.00 (0.99–1.00)	0.330
Aortic cross-clamp time	1.00 (0.99–1.01)	0.308

HR, hazard ratio; CI, confidence interval; PTFE, polytetrafluoroethylene.