ABSTRACT
Background
Evidence supporting the use of statins for primary prevention of cardiovascular disease (CVD) in individuals aged ≥ 80 years remains limited. This study aimed to evaluate the long-term clinical benefits and safety of statins for primary prevention in patients aged 80 years and older.
Methods
We conducted a population-based retrospective cohort study using electronic medical records and pharmacy dispensing data from Clalit Health Services in Israel, covering the period from January 2015 to December 2020. Patients aged ≥ 80 years without prior CVD who were persistent statin users were compared with similar patients not receiving statins. Exclusions included prior CVD, dialysis, or death within 1 year of follow-up. Outcomes included all-cause mortality, new coronary events, myopathy, dementia, and diabetes mellitus. Cox proportional hazards models, adjusted for potential confounders, were used to assess the association between statin use and clinical outcomes.
Results
Among 15,745 patients (mean age 84.5 years; 66% female), 8413 were statin users. Over a 4-year mean follow-up, statin use was associated with a 31% reduction in mortality (HR 0.69; 95% CI: 0.34–0.74; p < 0.001) and a 20% reduction in new coronary events (HR 0.80; 95% CI: 0.68–0.94; p = 0.008). No significant differences were observed in the incidence of myopathy, diabetes, or dementia. Benefits were not observed in patients who discontinued statins before age 80.
Conclusions
In patients aged ≥ 80 years, statin therapy for primary prevention was associated with reduced all-cause mortality and coronary morbidity, without increased risk of adverse events. Early discontinuation diminished these benefits.