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Association of Cystatin C with Adverse Outcomes

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Date 2009 Apr 18
PMID 19374014
Citations 20
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Abstract

Purpose Of Review: To discuss recent studies which have evaluated determinants of cystatin C and to focus on the relationship of cystatin C with mortality, cardiovascular disease (CVD), and noncardiovascular outcomes.

Recent Findings: In the Chronic Kidney Disease Epidemiology Study cystatin C was associated with demographic characteristics independent of measured glomerular filtration rate (GFR), although this was to a smaller extent than creatinine. In patients with established chronic kidney disease (CKD), cystatin C was strongly and inversely correlated with measured GFR, suggesting that although cystatin C may have other determinants, it is primarily a measure of kidney function. Several cohort studies, particularly in older adults, have now demonstrated that cystatin C is linearly associated with mortality, CVD and non-CVD outcomes, whereas creatinine is primarily associated with risk in individuals with more advanced kidney disease. A recent study has also shown that changes in kidney function as ascertained by cystatin C, even within the relatively normal range, are associated with subsequent CVD and all-cause mortality among older adults.

Summary: Cystatin C appears to capture an association of mild kidney disease with increased risk of mortality, CVD and non-CVD outcomes. Future studies should evaluate whether cystatin C can improve medical decision-making and lead to favorable patient outcomes.

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