Geographic variation in carotid revascularization among Medicare beneficiaries, 2003-2006.
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2010-07
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Abstract
Background
Little is known about patterns in the use of carotid revascularization since a 2004 Medicare national coverage decision supporting carotid artery stenting. We examined geographic variation in and predictors of carotid endarterectomy and carotid stenting.Methods
Analysis of claims from the Centers for Medicare & Medicaid Services from January 1, 2003, through December 31, 2006. Patients were 65 years or older and had undergone carotid endarterectomy or carotid stenting. The main outcome measures were annual age-adjusted rates of carotid endarterectomy and carotid stenting, factors associated with the use of carotid revascularization, and mortality rate at 30 days and 1 year.Results
The rate of endarterectomy decreased from 3.2 per 1000 person-years in 2003 to 2.6 per 1000 person-years in 2006. After adjustment for demographic and clinical characteristics, there was significant geographic variation in the odds of carotid revascularization, with the East North Central region having the greatest odds of endarterectomy (odds ratio, 1.60; 95% confidence interval, 1.55-1.65) and stenting (1.61; 1.46-1.78) compared with New England. Prior endarterectomy (odds ratio, 3.06; 95% confidence interval, 2.65-3.53) and coronary artery disease (2.12; 2.03-2.21) were strong predictors of carotid stenting. In 2005, mortality was 1.2% at 30 days and 6.8% at 1 year for endarterectomy and 2.3% at 30 days and 10.3% at 1 year for stenting.Conclusions
Significant geographic variation exists for carotid endarterectomy and carotid stenting. Prior endarterectomy and coronary disease were associated with greater odds of carotid stenting.Type
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Patel, MR, MA Greiner, LD DiMartino, KA Schulman, PW Duncan, DB Matchar and LH Curtis (2010). Geographic variation in carotid revascularization among Medicare beneficiaries, 2003-2006. Archives of internal medicine, 170(14). pp. 1218–1225. 10.1001/archinternmed.2010.194 Retrieved from https://hdl.handle.net/10161/22912.
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Scholars@Duke
Manesh Raman Patel
Manesh Patel is the Chief of the Division of Cardiology and the Division of Clinical Pharmacology. His clinical interests include diagnostic and interventional coronary angiography, peripheral angiography and endovascular intervention. His is involved in several clinical trials involving patients with cardiovascular disease and in cardiac imaging. He is also the Chair of the American College of Cardiology Task Force for Appropriate Use Criteria for Cardiovascular Procedures and is Chair of the American Heart Association Diagnostic and Interventional Cath Committee.
Patel's interest in cardiac imaging, quality of care, cardiac devices is also evident in his research. His integration of these efforts into his roles at Duke was recognized in 2010 when he received the prestigious Duke Cardiology Fellowship Mentor Award. In 2011, Dr. Patel was named the endowed John Bush Simpson Assistant Professor of Cardiology. In 2013, Dr. Patel received the Robert M. Califf Faculty clinical research Award.
Currently, Dr. Patel is leading an effort to redesign the delivery of care to patients undergoing invasive catheterization procedures in the health system with a specific aim of measure and providing individualized, patient centered, innovative, and efficient care.
David Bruce Matchar
My research relates to clinical practice improvement - from the development of clinical policies to their implementation in real world clinical settings. Most recently my major content focus has been cerebrovascular disease. Other major clinical areas in which I work include the range of disabling neurological conditions, cardiovascular disease, and cancer prevention.
Notable features of my work are: (1) reliance on analytic strategies such as meta-analysis, simulation, decision analysis and cost-effectiveness analysis; (2) a balancing of methodological rigor the needs of medical professionals; and (3) dependence on interdisciplinary groups of experts.
This approach is best illustrated by the Stroke Prevention Patient Outcome Research Team (PORT), for which I served as principal investigator. Funded by the AHCPR, the PORT involved 35 investigators at 13 institutions. The Stroke PORT has been highly productive and has led to a stroke prevention project funded as a public/private partnership by the AHCPR and DuPont Pharma, the Managing Anticoagulation Services Trial (MAST). MAST is a practice improvement trial in 6 managed care organizations, focussing on optimizing anticoagulation for individuals with atrial fibrillation.
I serve as consultant in the general area of analytic strategies for clinical policy development, as well as for specific projects related to stroke (e.g., acute stroke treatment, management of atrial fibrillation, and use of carotid endarterectomy.) I have worked with AHCPR (now AHRQ), ACP, AHA, AAN, Robert Wood Johnson Foundation, NSA, WHO, and several pharmaceutical companies.
Key Words: clinical policy, disease management, stroke, decision analysis, clinical guidelines
Lesley H. Curtis
Lesley H. Curtis is Chair and Professor in the Department of Population Health Sciences and Professor in Medicine in the Duke School of Medicine. A health services researcher by training, Dr. Curtis is an expert in the use of health care and Medicare claims data for health services and clinical outcomes research, and a leader in national data quality efforts. Dr. Curtis has led the linkage of Medicare claims with several large clinical registries and epidemiological cohort studies including the Framingham Heart Study and the Cardiovascular Health Study. Dr. Curtis recently served as a senior policy advisor at the Food and Drug Administration supporting the Agency’s evidence generation initiative, serves as an Investigator in the Coordinating Center for PCORI's PCORnet, and is co-PI of the NIH Pragmatic Trials Collaboratory, an NIH initiative to strengthen the national capacity for large-scale research studies embedded in health care delivery.
Areas of expertise: Health Services Research and Health Policy
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