Current clinical practice guidelines are not written with older adults with multiple illnesses in mind, according to a study in the August 10 issue of JAMA: The Journal of the American Medical Association.
The aging of the population and the increasing prevalence of chronic diseases pose challenges to the development and application of clinical practice guidelines (CPGs), according to background information in the article. In 1999, 48 percent of Medicare beneficiaries aged 65 years or older had at least 3 chronic medical conditions and 21 percent had 5 or more.
Clinical practice guidelines are based on clinical evidence and expert consensus to help decision making about treating specific diseases. Most CPGs address single diseases in accordance with modern medicine's focus on disease and pathophysiology. However, physicians who care for older adults with multiple diseases must strike a balance between following CPGs and adjusting recommendations for individual patients' circumstances. Difficulties escalate with the number of diseases the patient has. The limitations of current single-disease CPGs may be highlighted by the growth of pay-for-performance initiatives, which reward practitioners for providing specific elements of care. Because the specific elements of care may be based on single-disease CPGs, pay-for-performance may create incentives for ignoring the complexity of multiple comorbid (co-existing illnesses) chronic diseases and dissuade clinicians from providing optimal care for individuals with multiple comorbid diseases.
Cynthia M. Boyd, M.D., M.P.H., from the Center on Aging and Health, Johns Hopkins University, Baltimore, and colleagues examined how CPGs address comorbidity in older patients and explored what happens when multiple single-disease CPGs are applied to a hypothetical 79-year-old woman with 5 common chronic diseases. Selection of these diseases were based on data from the National Health Interview Survey and a nationally representative sample of Medicare beneficiaries (to identify the most prevalent chronic diseases in this population). The National Guideline Clearinghouse was used to locate evidence-based CPGs for each chronic disease. Of the 15 most common chronic diseases, the researchers focused on CPGs for hypertension, chronic heart failure, stable angina, atrial fibrillation, hypercholesterolemia, diabetes mellitus, osteoarthritis, chronic obstructive pulmonary disease, and osteoporosis.