. Author manuscript; available in PMC: 2013 Feb 1.

Published in final edited form as: J Nucl Cardiol. 2011 Nov 12;19(1):28–36. doi: 10.1007/s12350-011-9475-8

Table 2.

Cox proportional hazard analysis of incident acute coronary syndromes defined by severity of inducible silent myocardial ischemia

Severity of ischemia (%)	Hazard ratio^δ	95% confidence interval^δ	P value^δ
5	1.61	1.22-2.01	<.001
10	2.59	1.49-4.04
15	4.17	1.81-8.12

Model adjusted for age, hypertension, diabetes, LDL cholesterol, and current smoking and assumes different underlying hazards for sex and race.

Severity of ischemia = Summed Stress Score divided by 68 (maximum possible) × 100%.

^δ

Reflects an underlying hazard of 1.1 (95% CI 1.04-1.15) for each 1% increase in severity of ischemia as a continuous variable in the model.