Kidney function and progression of coronary artery calcium in community-dwelling older adults (from the Rancho Bernardo Study)

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Abstract

Longitudinal studies of the association of estimated glomerular filtration rate (eGFR) and albuminuria with coronary artery calcium (CAC), a measure of cardiovascular disease burden, are few and contradictory. In this study, 421 community-dwelling men and women (mean age 67 years) without known heart disease had eGFRs assessed using the Modification of Diet in Renal Disease (MDRD) equation and albuminuria assessed by urine albumin/creatinine ratio (ACR) from 1997 to 1999. The mean eGFR was 78 ml/min/1.73 m2, and the median ACR was 10 mg/g. CAC was measured using electron-beam computed tomography from 2000 to 2001, when the median total Agatston CAC score was 77; 4.5 years later, 338 participants still without heart disease underwent repeat scans (median CAC score 112); 46% of participants showed CAC progression, defined as an increase <2.5 mm3 in square root-transformed CAC volume score. Cross-sectional and longitudinal logistic regression analyses showed no separate or joint association between eGFR or ACR and CAC severity or progression. In conclusion, this study does not support the use of eGFR or ACR to identify asymptomatic older adults who should be screened for subclinical cardiovascular disease with initial or sequential scanning for CAC. In the elderly, kidney function and CAC may not progress together. © 2012 Elsevier Inc. All rights reserved.

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Jassal, S. K., Chonchol, M., Laughlin, G. A., Cummins, K. M., Smits, G., Kramer, C. K., … Barrett-Connor, E. (2012). Kidney function and progression of coronary artery calcium in community-dwelling older adults (from the Rancho Bernardo Study). American Journal of Cardiology, 110(10), 1425–1433. https://doi.org/10.1016/j.amjcard.2012.06.053

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