Cystatin-C and mortality in elderly persons with heart failure.

Abstract

OBJECTIVES:

We sought to evaluate cystatin-C, a novel measure of renal function, as a predictor of mortality in elderly persons with heart failure (HF) and to compare it with creatinine.

BACKGROUND:

Renal function is an important prognostic factor in patients with HF, but creatinine levels, which partly reflect muscle mass, may be insensitive for detecting renal insufficiency.

METHODS:

A total of 279 Cardiovascular Health Study participants with prevalent HF and measures of serum cystatin-C and creatinine were followed for mortality outcomes over a median of 6.5 years.

RESULTS:

Median creatinine and cystatin-C levels were 1.05 mg/dl and 1.26 mg/l. Each standard deviation increase in cystatin-C (0.35 mg/l) was associated with a 31% greater adjusted mortality risk (95% confidence interval [CI] 20% to 43%, p < 0.001), whereas each standard deviation increase in creatinine (0.39 mg/dl) was associated with a 17% greater adjusted mortality risk (95% CI 1% to 36%, p = 0.04). When both measures were combined in a single adjusted model, cystatin-C remained associated with elevated mortality risk (hazard ratio 1.60, 95% CI 1.32 to 1.94), whereas creatinine levels appeared associated with lower risk (hazard ratio 0.73, 95% CI 0.57 to 0.95).

CONCLUSIONS:

Cystatin-C is a stronger predictor of mortality than creatinine in elderly persons with HF. If confirmed in future studies, this new marker of renal function could improve risk stratification in patients with HF.

• Authors: Michael G Shlipak, Ronit Katz, Linda F Fried, Nancy Swords Jenny, Catherine O Stehman-Breen, Anne B Newman, David Siscovick, Bruce M Psaty, Mark J Sarnak
• Journal: Journal of the American College of Cardiology (J Am Coll Cardiol) Vol. 45 Issue 2 Pg. 268-71 (Jan 18 2005) ISSN: 0735-1097 [Print] United States
• PMID: 15653026 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, P.H.S.)

Chemical References

• CST3 protein, human
• Cystatin C
• Cystatins
• Creatinine

Topics

• Age Factors
• Aged
• Aged, 80 and over
• Creatinine (blood)
• Cystatin C
• Cystatins (blood)
• Female
• Follow-Up Studies
• Glomerular Filtration Rate
• Heart Failure (blood, mortality)
• Humans
• Male
• Pilot Projects
• Predictive Value of Tests
• Risk Assessment
• Survival Analysis