Table 3.

Multivariate Cox Model Analyses for Risk of Cardiac Events: First Aborted Cardiac Arrest [ACA] or LQT3 related Sudden Cardiac Death [SCD].

Endpoint = ACA/SCD (56 ACA/SCD: 34 SCD + 22 ACA)
		Hazard	95% Conf Int
Parameter	p-value	Ratio	LCL	UCL
Syncope	0.023	2.03	1.10	3.72
β-blockers among females*	0.032	0.20	0.05	0.87
β-blockers among males*	0.308	0.51	0.14	1.88
E1784K mutation	0.001	0.09	0.02	0.37
D1790G mutation	0.049	0.30	0.09	0.99
QTc per 10 ms (up to 500 ms)	<0.001	1.33	1.19	1.48
Year of birth (after 1955)	<0.001	1.06	1.03	1.09
*Test for β-blockers x sex interaction:
β-blockers for males vs females	0.353