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Update on Hyperlipidemia in the Elderly: Is This a Risk Factor for Heart Disease?
William B. Kannel1, Peter W.F. Wilson
1Department of Medicine, Section of Preventive Medicine and Epidemiology, Evans Memorial Research Foundation, Boston University School of Medicine/Framingham Heart Study, Boston, MA.
Insights
Lipid screening in the elderly shows conflicting results for total cholesterol but highlights high-density lipoprotein-cholesterol (HDL-C) as a key marker for coronary heart disease (CHD). Further trials are needed to assess lipid-lowering treatments in older adults.
Area of Science:
- Gerontology
- Cardiovascular Medicine
- Clinical Lipidology
Background:
- Conflicting evidence exists regarding the utility of lipid screening in the elderly for predicting coronary heart disease (CHD).
- While total cholesterol lacks consistent association with CHD in older adults, high-density lipoprotein-cholesterol (HDL-C) and the total/HDL-C ratio show promise as effective markers.
- The attributable risk for CHD from lipid abnormalities may be higher in the elderly due to a greater event burden, despite a declining relative risk.
Purpose of the Study:
- To review the current evidence on lipid screening in the elderly and its association with coronary heart disease (CHD).
- To evaluate the role of high-density lipoprotein-cholesterol (HDL-C) and total/HDL-C ratio as CHD risk markers in older populations.
- To advocate for targeted clinical trials of lipid-altering therapies in individuals over 65 years of age.
Main Methods:
- Systematic review of existing literature on lipid screening and CHD in the elderly.
- Analysis of studies examining the association between lipid profiles (total cholesterol, HDL-C, total/HDL-C ratio) and CHD incidence in older adults.
- Evaluation of data from clinical trials on lipid-lowering agents in middle-aged populations.
Main Results:
- Many studies report no significant association between total cholesterol levels and CHD development in the elderly.
- Recent investigations indicate that HDL-C levels and the total/HDL-C ratio are effective predictors of CHD in older populations.
- Despite a decrease in relative risk, the attributable risk for CHD from adverse lipid profiles is substantial in the elderly due to higher event rates.
Conclusions:
- High-density lipoprotein-cholesterol (HDL-C) and the total/HDL-C ratio are valuable lipid markers for assessing coronary heart disease (CHD) risk in elderly individuals.
- Further research, including dedicated clinical trials, is warranted to determine the efficacy and safety of lipid-lowering interventions in adults aged 65 and older.
- Targeted lipid management strategies may reduce morbidity and mortality associated with CHD in the aging population.
Abstract:
Results concerning the utility of lipid screening in the elderly are conflicting. Many studies have shown no association between total cholesterol measurements in the elderly and the development of coronary heart disease (CHD). Several recent investigations, with a few exceptions, have demonstrated that high-density lipoprotein-cholesterol (HDL-C) levels and the total/HDL-C ratio are, however, effective markers for CHD in older populations. Although the relative risk associated with lipid measurements tends to decline in older persons, the attributable risk for CHD associated with higher cholesterol and lower HDL-C tends to be greater in older persons because of a greater number of events in this population. Clinical trials with modern lipid-lowering agents have demonstrated efficacy and safety in middle-aged subjects with the newer medications, and it is time to consider a lipid altering clinical trial specifically targeted to persons over the age of 65 years to determine whether morbidity and mortality can be reduced.