Renal Insufficiency as a Predictor of Cardiovascular Outcomes and Mortality in Elderly Individuals

J Am Coll Cardiol. 2003 Apr 16;41(8):1364-72. doi: 10.1016/s0735-1097(03)00163-3.

Abstract

Objectives: This study was designed to evaluate the relationship between elevated creatinine levels and cardiovascular events.

Background: End-stage renal disease is associated with high cardiovascular morbidity and mortality. The association of mild to moderate renal insufficiency with cardiovascular outcomes remains unclear.

Methods: We analyzed data from the Cardiovascular Health Study, a prospective population-based study of subjects, aged >65 years, who had a serum creatinine measured at baseline (n = 5,808) and were followed for a median of 7.3 years. Proportional hazards models were used to examine the association of creatinine to all-cause mortality and incident cardiovascular mortality and morbidity. Renal insufficiency was defined as a creatinine level > or =1.5 mg/dl in men or > or =1.3 mg/dl in women.

Results: An elevated creatinine level was present in 648 (11.2%) participants. Subjects with elevated creatinine had higher overall (76.7 vs. 29.5/1,000 years, p < 0.001) and cardiovascular (35.8 vs. 13.0/1,000 years, p < 0.001) mortality than those with normal creatinine levels. They were more likely to develop cardiovascular disease (54.0 vs. 31.8/1,000 years, p < 0.001), stroke (21.1 vs. 11.9/1,000 years, p < 0.001), congestive heart failure (38.7 vs. 17/1,000 years, p < 0.001), and symptomatic peripheral vascular disease (10.6 vs. 3.5/1,000 years, p < 0.001). After adjusting for cardiovascular risk factors and subclinical disease measures, elevated creatinine remained a significant predictor of all-cause and cardiovascular mortality, total cardiovascular disease (CVD), claudication, and congestive heart failure (CHF). A linear increase in risk was observed with increasing creatinine.

Conclusions: Elevated creatinine levels are common in older adults and are associated with increased risk of mortality, CVD, and CHF. The increased risk is apparent early in renal disease.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Aged
  • Cardiovascular Diseases / blood
  • Cardiovascular Diseases / etiology*
  • Cardiovascular Diseases / mortality*
  • Confidence Intervals
  • Creatinine / blood*
  • Female
  • Heart Failure / etiology
  • Heart Failure / mortality
  • Humans
  • Intermittent Claudication / etiology
  • Intermittent Claudication / mortality
  • Kidney Failure, Chronic / blood
  • Kidney Failure, Chronic / complications*
  • Male
  • Odds Ratio
  • Predictive Value of Tests
  • Survival Analysis

Substances

  • Creatinine