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Editor's Correspondence
January 23, 2006

Systemic Atherosclerosis and Kidney Disease—Reply

Author Affiliations

Copyright 2006 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.2006

Arch Intern Med. 2006;166(2):250. doi:10.1001/archinte.166.2.250-b

In reply

We thank Kshirsagar and Colindres for their comments on our article.1 Because we analyzed the percentage change in serum creatinine concentration between visits 1 and 2 of the ARIC study and because creatinine assays for the first 2 ARIC visits were performed at the same laboratory (University of Minnesota) with very similar calibration, there was no need to adjust to the Cleveland Clinic laboratory. We did not use the Modification of Diet in Renal Disease equation and did not classify glomerular filtration rate estimates.2,3 We therefore see no possibility of misclassification bias.

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