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Changing patient characteristics and the effect on mortality in endocarditis
Christopher H Cabell1, James G Jollis, Gail E Peterson
1Department of Medicine, Duke University Medical Center, Box 31020, Durham, NC 27710. chris.cabell@duke.edu
Archives of Internal Medicine
|February 5, 2002
Summary
Infective endocarditis (IE) demographics and microbiology have shifted, with Staphylococcus aureus now a leading cause and independent predictor of mortality. This highlights evolving trends in IE patient populations and outcomes.
Area of Science:
- Cardiology
- Infectious Diseases
- Epidemiology
Background:
- Limited data exist on recent demographic and microbiological shifts in infective endocarditis (IE).
- The impact of these changes on patient survival remains incompletely understood.
Purpose of the Study:
- To analyze demographic and microbiological changes in IE patients.
- To evaluate the impact of these changes on patient survival.
Main Methods:
- Retrospective data collection from 329 definite or possible IE patients at Duke University Medical Center (1993-1999).
- Logistic regression to identify demographic and microbiological trends.
- Cox proportional hazards modeling to assess survival impact.
Main Results:
- Increased rates of hemodialysis dependence, immunosuppression, and Staphylococcus aureus infections.
- Decreased rates of viridans group streptococci infections.
- Staphylococcus aureus IE independently associated with higher 1-year mortality (43.9% vs 32.5%).
Conclusions:
- IE characteristics have evolved, potentially linked to medical practices.
- Staphylococcus aureus is a dominant IE pathogen and predictor of mortality.
- Findings suggest enhanced surveillance and prevention strategies are warranted.