Table 4.

Multivariate models of variables associated with sudden cardiac arrest

	Model 1 (n=1529)		Model 2 (n=880)*
	OR (95% CI)	P value	OR (95% CI)	P value
QRS-T angle >90°	1.8 (1.34–2.30)	<0.0001	2.2 (1.59–3.10)	<0.0001
Age	1.0 (0.99–1.01)	0.47	1.0 (1.00–1.02)	0.12
Male gender	1.1 (0.86–1.38)	0.47	1.0 (0.71–1.32)	0.83
Heart rate	1.0 (1.03–1.04)	<0.0001	1.0 (1.01–1.03)	<0.0001
Prolonged intraventricular conduction	1.0 (0.78–1.40)	0.78	1.1 (0.74–1.56)	0.69
Hypertension	1.2 (0.94–1.54)	0.14	1.1 (0.78–1.60)	0.54
Diabetes mellitus	1.6 (1.25–2.00)	0.0001	1.8 (1.30–2.38)	0.0002
Previous MI	1.1 (0.86–1.36)	0.49	1.2 (0.90–1.62)	0.22
ECG LVH	1.2 (0.86–1.66)	0.28	1.0 (0.67–1.50)	0.99
Severely impaired LVEF†	-	-	1.6 (1.09–2.46)	0.02

LVEF denotes left ventricular ejection fraction; MI, myocardial infarction; LVH by ECG, left ventricular hypertrophy by electrocardiographic criteria

Prolonged intraventricular conduction defined as QRS duration (QRSD) >110ms; Severely impaired LVEF, ≤35%.

^*For Model 2, results were calculated using the non-missing data as the denominator.

^†Information on LVEF was available for 330 cases and 402 controls.