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Published on: November 10, 2017
The benefit of cholesterol-lowering medications after coronary revascularization: a population study
James M Brophy1, Paul Brassard, Chantal Bourgault
1Department of Medicine, McGill University Health Center, McGill University, Montréal, Québec, Canada. james.brophy@mcgill.ca
Insights
Cholesterol-lowering medications significantly reduced mortality and myocardial infarction risk in elderly patients after coronary revascularization. These findings highlight the importance of statin therapy for secondary prevention in this population.
Area of Science:
- Cardiology
- Pharmacology
- Public Health
Background:
- Cholesterol-lowering medications are proven effective for secondary prevention in coronary artery disease.
- Benefits in elderly patients post-coronary revascularization are less understood in routine practice.
Purpose of the Study:
- To evaluate the effectiveness of cholesterol-lowering drug therapy in elderly patients after coronary revascularization.
- To assess the impact on total mortality, myocardial infarction, and repeat revascularizations.
Main Methods:
- Utilized Quebec's administrative health databases to identify elderly patients (>65) post-revascularization (1995-1997).
- Assessed cholesterol-lowering drug prescription fulfillment rates.
- Employed time-dependent multivariable models to analyze clinical outcomes over a 3-year follow-up.
Main Results:
- 11,958 elderly patients were included.
- Cholesterol-lowering drug users showed a reduced risk of death (HR 0.66) and myocardial infarction (HR 0.77).
- No significant reduction in repeat revascularizations was observed (HR 1.06).
Conclusions:
- Cholesterol-lowering medications provide significant health benefits in elderly patients post-revascularization.
- Observed benefits are comparable to those in clinical trials.
- Emphasizes the critical role of these drugs in secondary prevention for a broader patient population.
Background:
In clinical trials, cholesterol-lowering medications have been proven to decrease mortality and morbidity and are strongly recommended as secondary prevention in patients with established coronary artery disease. In routine practice, the translation of these benefits to elderly patients with recent coronary revascularization is less well known.
Methods:
Using the provincial computerized administrative databases of the Régie de l'Assurance Maladie du Québec, we identified all elderly patients (>65 years old) in Quebec, Canada, discharged alive after a coronary revascularization procedure (percutaneous coronary intervention or coronary artery bypass graft) between April 1, 1995, and December 31, 1997, and determined the percentage fulfilling prescriptions for cholesterol-lowering drug therapy. Time-dependent multivariable models examined the clinical end points of total mortality, acute myocardial infarctions, and repeat coronary revascularizations as a function of cholesterol-lowering drug exposure. Patients were followed up until death or December 31, 1999.
Results:
We identified 11958 elderly patients who had a coronary revascularization between April 1, 1995, and December 31, 1997. During an average 3-year follow-up, users of cholesterol-lowering medications had a decreased risk of death [hazard ratio (HR) 0.66, 95% CI 0.45-0.96] or myocardial infarction (HR 0.77, 95% CI 0.54-1.11) but no reduction in repeat revascularizations (HR 1.06, 95% CI 0.88-1.28).
Conclusions:
In this population-based study of recently revascularized elderly patients, we observed health benefits associated with the use of cholesterol-lowering medications of similar size to those seen in randomized clinical trials. The translation of these benefits from clinical trials to a nonselected population of revascularized patients emphasizes the importance of this aspect of secondary prevention in clinical practice.
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