TABLE 2.

Factors associated with development of tachyarrhythmia or atrioventricular block after the Norwood procedure, adjusted for site

	OR (95% CI)	P value
Tachyarrhythmia
Final shunt type
MBTS	1.49 (0.96–2.32)	.08
RVPAS	ref
Age at Norwood procedure*
Age at Norwood ≤7 d, every 1-d increase	1.01 (0.88–1.15)	.94
Age at Norwood 8–20 d, every 1-d increase	0.77 (0.56–1.01)	.07
Atrioventricular block
Other procedures done at time of Norwood	5.06 (1.81–13.38)	.001

OR, Odds ratio; CI, confidence interval; MBTS, modified Blalock–Taussig shunt; RVPAS, right ventricle-to-pulmonary artery shunt.

^*Insufficient data beyond 20 days of age.