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Decreased Norton's functional score is an independent long-term prognostic marker in hospital survivors of acute myocardial infarction. Soroka Acute Myocardial Infarction II (SAMI-II) project.
International Journal of Cardiology 2017 Februrary 2
BACKGROUND: Patient function is a risk factor of mortality following acute myocardial infarction (AMI). Norton scale (NS) was originally developed to estimate the risk for pressure ulcers. It contains 5 domains: mental condition, physical condition, mobility, activity in daily living and incontinence.
OBJECTIVE: To evaluate NS as long-term prognostic marker following AMI.
METHODS: A retrospective study based on computerized medical records of AMI patient hospitalized in a tertiary medical center in 2004-2012. NS scores and patients' characteristics were collected from computerized databases. The primary outcome was all-cause long-term (up-to 10-years) mortality.
RESULTS: Overall 6964 patients were included; mean age 67.3±14.1years, 68.1% males. Mean NS score was 17.8±3; of which 21.1% had low-NS (≤16). Patients with low-NS had increased prevalence of hypertension, diabetes and renal disease, 3-vessel coronary artery disease, more often Non ST-Elevation Myocardial Infarction (NSTEMI) and in-hospital complications. Throughout the follow-up period cumulative mortality rate in patients with low- and high-NS groups were 97.3% and 43% respectively (AdjHR 1.66; 95% CI: 1.521-1.826; p<0.001). Furthermore, a reduction in one point in the NS score inversely associated with increased risk for mortality (AdjHR 1.10; 95% CI: 1.12-1.22; p<0.001).
CONCLUSIONS: NS is an independent long-term prognostic marker for all-cause mortality in hospital survivors with a gradual "dose-response" effect. This data emphasizes the importance prognostic implication of the general functional status on the prognosis of AMI patients.
OBJECTIVE: To evaluate NS as long-term prognostic marker following AMI.
METHODS: A retrospective study based on computerized medical records of AMI patient hospitalized in a tertiary medical center in 2004-2012. NS scores and patients' characteristics were collected from computerized databases. The primary outcome was all-cause long-term (up-to 10-years) mortality.
RESULTS: Overall 6964 patients were included; mean age 67.3±14.1years, 68.1% males. Mean NS score was 17.8±3; of which 21.1% had low-NS (≤16). Patients with low-NS had increased prevalence of hypertension, diabetes and renal disease, 3-vessel coronary artery disease, more often Non ST-Elevation Myocardial Infarction (NSTEMI) and in-hospital complications. Throughout the follow-up period cumulative mortality rate in patients with low- and high-NS groups were 97.3% and 43% respectively (AdjHR 1.66; 95% CI: 1.521-1.826; p<0.001). Furthermore, a reduction in one point in the NS score inversely associated with increased risk for mortality (AdjHR 1.10; 95% CI: 1.12-1.22; p<0.001).
CONCLUSIONS: NS is an independent long-term prognostic marker for all-cause mortality in hospital survivors with a gradual "dose-response" effect. This data emphasizes the importance prognostic implication of the general functional status on the prognosis of AMI patients.
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