Global Registry of Acute Coronary Events (GRACE) hospital discharge risk score accurately predicts long-term mortality post acute coronary syndrome

Eng Wei Tang, Cheuk-Kit Wong, Peter Herbison
American Heart Journal 2007, 153 (1): 29-35

BACKGROUND: The Global Registry of Acute Coronary Events (GRACE) hospital discharge risk score (GRACE score) developed from a multinational registry involving all subsets of acute coronary syndrome (ACS) predicted 6-month survival. There is currently no validated risk model to predict mortality beyond 6 months.

METHODS AND RESULTS: Of the 1143 consecutive patients with ACS admitted to coronary care unit in 2000 to 2002 (mean age, 64.9 +/- 12.6 years), 39% had ST-elevation myocardial infarction, 39% had non-ST-elevation infarction, and 22% had unstable angina. The mortality was 7.5% during index admission, 12.1% at 6 months, 14.8% at 1 year, 18.7% at 2 years, 25.0% at 3 years, and 39.2% at 4 years. The GRACE hospital discharge risk score calculated for 1057 hospital survivors discriminated survival from death at 6 months (C index, 0.81), 1 year (C index, 0.82), 2 years (C index, 0.81), 3 years (C index, 0.81), and 4 years (C index, 0.80). The risk score worked for all 3 subsets of ACS at all time points, with C index >0.75 in all analyses. A separate multivariable mortality model for these 1057 patients over the 4-years follow-up period identified 10 independent predictors of mortality. Seven were in the GRACE risk model (age, history of ischemic heart disease, heart failure, increased heart rate on admission, serum creatinine level, evidence of myonecrosis, not receiving in-hospital percutaneous coronary intervention).

CONCLUSIONS: The GRACE postdischarge risk score contains relevant prognostic factors and accurately discriminate survivors from nonsurvivors over the longer term (up to 4 years) in all subsets of ACS patients.

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