Table 3.

Multivariate Cox regression analysis for clinical and ECG predictors of shorter time to VT/VF postdiagnosis

Feature	HR	95% CI	P value
Initially VT/VF	24.0	(1.21 to 479)	0.037
Initial syncope	7.19	(0.622 to 83.1)	0.114
Other arrhythmia	1.04	(0.141 to 7.70)	0.969
QRS duration average	1.06	(0.975 to 1.16)	0.171
QTc interval average	0.997	(0.957 to 1.04)	0.874
P wave duration SD	1.07	(1.00 to 1.13)	0.044
QRS axis SD	1.01	(0.990 to 1.03)	0.364

P-values less than 0.05 are shown in bold text.

QTc, corrected QT interval; VF, ventricular fibrillation; VT, ventricular tachycardia.