03216nas a2200445 4500008004100000022001400041245008600055210006900141260001600210300001200226490000800238520200500246653000902251653001502260653002802275653003302303653001502336653001502351653001402366653001102380653002202391653003102413653001102444653001102455653002002466653000902486653001402495653002602509653001402535653000902549100002402558700002002582700001602602700002002618700002402638700002002662700002402682700002902706856003502735 2005 eng d a1533-440600aCystatin C and the risk of death and cardiovascular events among elderly persons.0 aCystatin C and the risk of death and cardiovascular events among c2005 May 19 a2049-600 v3523 a
BACKGROUND: Cystatin C is a serum measure of renal function that appears to be independent of age, sex, and lean muscle mass. We compared creatinine and cystatin C levels as predictors of mortality from cardiovascular causes and from all causes in the Cardiovascular Health Study, a cohort study of elderly persons living in the community.
METHODS: Creatinine and cystatin C were measured in serum samples collected from 4637 participants at the study visit in 1992 or 1993; follow-up continued until June 30, 2001. For each measure, the study population was divided into quintiles, with the fifth quintile subdivided into thirds (designated 5a, 5b, and 5c).
RESULTS: Higher cystatin C levels were directly associated, in a dose-response manner, with a higher risk of death from all causes. As compared with the first quintile, the hazard ratios (and 95 percent confidence intervals) for death were as follows: second quintile, 1.08 (0.86 to 1.35); third quintile, 1.23 (1.00 to 1.53); fourth quintile, 1.34 (1.09 to 1.66); quintile 5a, 1.77 (1.34 to 2.26); 5b, 2.18 (1.72 to 2.78); and 5c, 2.58 (2.03 to 3.27). In contrast, the association of creatinine categories with mortality from all causes appeared to be J-shaped. As compared with the two lowest quintiles combined (cystatin C level, < or =0.99 mg per liter), the highest quintile of cystatin C (> or =1.29 mg per liter) was associated with a significantly elevated risk of death from cardiovascular causes (hazard ratio, 2.27 [1.73 to 2.97]), myocardial infarction (hazard ratio, 1.48 [1.08 to 2.02]), and stroke (hazard ratio, 1.47 [ 1.09 to 1.96]) after multivariate adjustment. The fifth quintile of creatinine, as compared with the first quintile, was not independently associated with any of these three outcomes.
CONCLUSIONS: Cystatin C, a serum measure of renal function, is a stronger predictor of the risk of death and cardiovascular events in elderly persons than is creatinine.
10aAged10aBiomarkers10aCardiovascular Diseases10aCerebrospinal Fluid Proteins10aCreatinine10aCystatin C10aCystatins10aFemale10aFollow-Up Studies10aGlomerular Filtration Rate10aHumans10aKidney10aKidney Diseases10aMale10aMortality10aMultivariate Analysis10aPrognosis10aRisk1 aShlipak, Michael, G1 aSarnak, Mark, J1 aKatz, Ronit1 aFried, Linda, F1 aSeliger, Stephen, L1 aNewman, Anne, B1 aSiscovick, David, S1 aStehman-Breen, Catherine uhttps://chs-nhlbi.org/node/840