Association of Coronary Aortic Calcium with Abdominal Aortic Calcium Detected on Lateral Dual Energy X-ray Absorptiometry Spine Images

Overview

Journal Am J Cardiol

Specialty Cardiology & Vascular Diseases

Date 2009 Jul 21

PMID 19616658

Citations 10

Authors

John T Schousboe

Diane Claflin

Elizabeth Barrett-Connor

Affiliations

Soon will be listed here.

Abstract

The association of abdominal aortic calcium (AAC) on lateral spine bone densitometry with coronary artery calcium (CAC) has not been reported. We studied 33 men and 73 women who had CAC scored with electron beam computed tomography at the eighth visit of the Rancho Bernardo study and lateral spine dual-energy x-ray absorptiometry images fully evaluable for AAC at the ninth study visit. The association between CAC level and AAC tertile was assessed by ordinal logistic regression analysis. The odds ratio of having a greater CAC score for those with an AAC score in the top tertile (24-point scale score > or =5) was 6.42 (95% confidence interval 2.28 to 18.1) and using the 8-point scale (score > or =3) was 3.38 (95% confidence interval 1.26 to 9.07) compared with those with AAC scores in the bottom tertiles, adjusted for age, gender, systolic blood pressure, total and high-density lipoprotein cholesterol, smoking status, and diabetes. A 24-point AAC score of > or =5 had a sensitivity of 65% and specificity of 70% to detect a high CAC score (> or =400 points). An 8-point AAC score of > or =3 had a sensitivity of 45% and specificity of 78%. In conclusion, a high level of AAC on lateral spine dual-energy x-ray absorptiometry was strongly associated with coronary artery disease and might be commonly encountered because bone densitometry is indicated for all women aged > or =65 years and all men aged > or =70 years. Its presence should be reported to the patient's physician to identify and manage modifiable risk factors.

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