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Familial hypercholesterolemia (FH) is a family of genetic disorders characterized by impaired hepatic clearance of low-density lipoprotein (LDL) particles, due to pathogenic variants that impair LDL receptor function.1,2 Lifelong elevation of LDL cholesterol (LDL-C) results in accelerated atherosclerosis and increased risk of atherosclerotic cardiovascular disease (ASCVD). Worldwide, heterozygous FH affects approximately 1 in 250 to 350 individuals, based on genetic epidemiology studies of pathogenic variants in FH-associated genes.1-3 Homozygous FH is rare, occurring in approximately 1 in 160 000 to 500 000 individuals.2 Among people with untreated heterozygous FH, approximately half of men develop fatal or nonfatal coronary events by age 50 years and approximately one-third of women by age 60 years.
The risk of atherosclerotic cardiovascular disease increases with advancing age. Elevated LDL-cholesterol and non-HDL-cholesterol levels remain predictive of incident atherosclerotic cardiovascular events among individuals older than 75 years. Risk prediction among older individuals is less certain because most current risk calculators lack specificity in those older than 75 years and do not adjust for co-morbidities, functional status, frailty, and cognition which significantly impact prognosis in this age group. Data on the benefits and risks of lowering LDL-cholesterol with statins in older patients without atherosclerotic cardiovascular disease are also limited since most primary prevention trials have included mostly younger patients. Available data suggest that statin therapy in older primary prevention patients may reduce atherosclerotic cardiovascular events and that benefits from lipid-lowering with statins outweigh potential risks such as statin-associated muscle symptoms and incident Type 2 diabetes mellitus. While some evidence suggests the possibility that statins may be associated with incident cognitive impairment in older adults, a preponderance of literature indicates neutral or even protective statin-related cognitive effects. Shared decision-making which is recommended for all patients when considering statin therapy is particularly important in older patients. Randomized clinical trial data evaluating the use of non-statin lipid-lowering therapy in older patients are sparse. Deprescribing of lipid-lowering agents may be appropriate for select patients older than 75 years with life-limiting diseases. Finally, a patient-centered approach should be taken when considering primary prevention strategies for older adults.
As life expectancy continues to rise, the burden of cardiovascular disease among older people is expected to increase, making cardiovascular prevention in older people an issue of growing interest and public health importance. We aimed to explore the long‐term effects of adherence to statins on mortality and cardiovascular morbidity among older adults.
DESIGN
A historical population‐based cohort study using routinely collected data.
SETTING
Clalit Health Services Northern District.
PARTICIPANTS
We followed members of Clalit Health Services aged 65 years or older who were eligible for primary cardiovascular prevention for a period of 10 years.
MEASUREMENTS
We fitted Cox regression models to assess the association between the adherence to statin therapy and all‐cause mortality and cardiovascular morbidity, adjusting for cardiovascular risk factors and associated morbidity as time‐updated variables.
RESULTS
The analysis included 19 518 older adults followed during 10 years (median = 9.7 y). All‐cause mortality rates were 34% lower among those who had adhered to statin treatment, compared with those who had not (hazard ratio [HR] = .66; 95% confidence interval [CI] = .56‐.79). Adherence to statins was also associated with fewer atherosclerotic cardiovascular disease events (HR = .80; 95% CI = .71‐.81). The benefit of statin use did not diminish among beyond age 75 and was evident for both women and men.
CONCLUSION
Adherence to statins may be associated with reduced mortality and cardiovascular morbidity among older adults, regardless of age and sex. J Am Geriatr Soc 67:2038–2044, 2019
