Risk Stratification in Stable Coronary Artery Disease: Superiority of N-terminal Pro B-type Natriuretic Peptide Over High-Sensitivity C-reactive Protein, Gamma-Glutamyl Transferase, and Traditional Risk Factors

Coron Artery Dis. 2012 Mar;23(2):91-7. doi: 10.1097/MCA.0b013e32834f1165.

Abstract

Objective: The aim of the study was to compare N-terminal pro B-type natriuretic peptide (NT-proBNP), high-sensitivity C-reactive protein, and gamma-glutamyl transferase (γ-GT) with traditional risk markers for estimating prognosis in patients with stable coronary artery disease (CAD).

Materials and methods: Evaluation of mortality and a combined clinical endpoint (mortality, need for coronary revascularization, myocardial infarction, hospitalization for cardiac causes, or stroke) during an average 3.2-year follow-up in 394 consecutive patients (73% male patients, age: 67±9 years) with angiographically proven stable CAD.

Results: Univariate Kaplan-Meier survival rate analysis showed that traditional risk markers, apart from impaired renal function, three-vessel CAD, and a reduced left ventricular function at the time of coronary angiography, were not of prognostic relevance for prediction of outcome. NT-proBNP, high-sensitivity C-reactive protein, and gamma-glutamyl transferase were significant predictors of mortality; however, only NT-proBNP was a significant predictor of the combined endpoint. In age-adjusted and sex-adjusted multivariate Cox regression analysis, NT-proBNP was the strongest independent predictor of the combined endpoint (odds ratio 2.92, 95% confidence interval: 1.72-4.94, first vs. third tertile). All three laboratory parameters remained independent risk markers for mortality in multivariate analysis. NT-proBNP, however, revealed the highest odds ratio (5.23, 95% confidence interval: 1.17-23.23, first vs. third tertile). Concentrations greater than 356 ng/l predicted mortality with a sensitivity of 70%, a specificity of 71%, a positive likelihood ratio of 2.4, and a negative likelihood ratio of 0.42.

Conclusion: In comparison with other tested novel biomarkers and traditional risk markers, NT-proBNP was the most predictive prognostic marker in multivariate analysis in patients with stable CAD.

Publication types

  • Comparative Study

MeSH terms

  • Aged
  • Austria / epidemiology
  • Biomarkers / blood
  • C-Reactive Protein / metabolism*
  • Coronary Angiography
  • Coronary Artery Disease / blood
  • Coronary Artery Disease / diagnosis
  • Coronary Artery Disease / epidemiology*
  • Disease Progression
  • Echocardiography
  • Electrocardiography
  • Female
  • Follow-Up Studies
  • Humans
  • Incidence
  • Male
  • Middle Aged
  • Natriuretic Peptide, Brain / blood*
  • Peptide Fragments / blood*
  • Prognosis
  • ROC Curve
  • Retrospective Studies
  • Risk Assessment*
  • Risk Factors
  • Severity of Illness Index
  • Surveys and Questionnaires
  • Survival Rate / trends
  • gamma-Glutamyltransferase / blood*

Substances

  • Biomarkers
  • Peptide Fragments
  • pro-brain natriuretic peptide (1-76)
  • Natriuretic Peptide, Brain
  • C-Reactive Protein
  • gamma-Glutamyltransferase