Table 4. Multivariate Cox regression models for prediction of sudden arrhythmic death and all-cause mortality with SAI QRST as continuous variable in patients with and without bundle branch block.

			SCD/VF/VF		Total mortality
	Predictor		Hazard ratio (95% CI)	P value	Hazard ratio (95% CI)	P value
All patients	BUN, mg/dL		1.02(1.00–1.03)	0.042	1.04(1.02–1.05)	<0.001
	CHF NYHA class>II		1.61(1.10–2.34)	0.013	1.12(0.73–1.71)	0.604
	SAI QRST per 100 mV*ms		1.30(1.09–1.56)	0.004	1.25(1.02–1.52)	0.029
	Bundle branch block		0.95(0.60–1.49)	0.808	1.40(0.85–2.31)	0.184
BBB patients	BUN, mg/dL	1.01(1.00–1.03)		0.049	1.04(1.02–1.05)	<0.001
	CHF NYHA class>II	1.62(1.11–2.36)		0.012	1.13(0.74–1.74)	0.573
	SAI QRST per 100 mV*ms	1.30(1.04–1.63)		0.020	1.17(0.78–1.73)	0.450
Non-BBB	BUN, mg/dL	1.01(1.00–1.03)		0.049	1.04(1.02–1.05)	<0.001
	CHF NYHA class>II	1.62(1.11–2.36)		0.012	1.13(0.74–1.74)	0.573
	SAI QRST per 100 pmV*ms	1.31(0.96–1.77)		0.088	1.28(1.02–1.61)	0.035