Table IV.

Final Logistic Regression Model

Variable	Model R2	B	Wald	p	Odds Ratio	Confidence Interval
constant	0.09	-1.51	29.26	0.00	0.22
Documented VT > 10 seconds		1.49	5.81	0.02	4.45	1.32– 14.98
COPD		1.13	4.38	0.04	3.10	1.08 – 8.91
CHF		0.82	5.37	0.02	2.28	1.14 – 4.56

COPD=chronic obstructive pulmonary disease

VT=ventricular tachycardia

CHF=congestive heart failure