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Analysis of efficacy and safety in patients aged 65-75 years at randomization: Collaborative Atorvastatin Diabetes
H Andrew W Neil1, David A DeMicco, Don Luo
1Division of Public Health and Primary Health Care, University of Oxford, Old Road Campus, Headington, Oxford OX3 7LF, UK. andrew.neil@wolfson.ox.ac.uk
Insights
Older patients with type 2 diabetes benefit significantly from atorvastatin, a statin therapy, showing substantial cardiovascular risk reduction comparable to younger individuals. This study confirms the efficacy and safety of atorvastatin in elderly populations.
Area of Science:
- Cardiology
- Endocrinology
- Geriatrics
Background:
- Cardiovascular disease (CVD) risk is highest in the elderly.
- Statin therapy effectively reduces CVD risk proportionally in all age groups.
- Limited data exist on statin efficacy in elderly patients with type 2 diabetes.
Purpose of the Study:
- To compare the efficacy and safety of atorvastatin in older (65-75 years) versus younger patients with type 2 diabetes.
- To analyze data from the Collaborative Atorvastatin Diabetes Study (CARDS) via post hoc analysis.
Main Methods:
- Post hoc analysis of the CARDS randomized placebo-controlled trial.
- Included 1,129 patients aged 65-75 years and 1,709 younger patients.
- Primary endpoint: time to first major cardiovascular event (acute coronary heart disease, revascularization, or stroke).
Main Results:
- Atorvastatin reduced relative risk of major cardiovascular events by 38% in older patients and 37% in younger patients.
- Absolute risk reductions were 3.9% in older and 2.7% in younger patients.
- Atorvastatin demonstrated a similar safety profile across both age groups.
Conclusions:
- Statin therapy, specifically atorvastatin, offers substantial absolute and relative benefits for older patients with type 2 diabetes.
- Treatment with atorvastatin is warranted for all eligible patients with type 2 diabetes unless contraindicated.
Objective:
Rates of cardiovascular disease are highest in the elderly. Lipid-lowering statin therapy reduces the proportional risk as effectively in older patients as in younger individuals; however, limited data are available for elderly patients with type 2 diabetes. We conducted a post hoc analysis to compare the efficacy and safety of atorvastatin among 1,129 patients aged 65-75 years at randomization with 1,709 younger patients in the Collaborative Atorvastatin Diabetes Study (CARDS).
Research Design And Methods:
CARDS was a randomized placebo-controlled trial of 10 mg/day atorvastatin for primary prevention of cardiovascular disease in patients aged 40-75 years with LDL cholesterol concentrations =4.14 mmol/l followed for a median of 3.9 years. The primary end point was time to first occurrence of acute coronary heart disease events, coronary revascularizations, or stroke.
Results:
Atorvastatin treatment resulted in a 38% reduction in relative risk ([95% CI -58 to -8], P = 0.017) of first major cardiovascular events in older patients and a 37% reduction ([-57 to -7], P = 0.019) in younger patients. Corresponding absolute risk reductions were 3.9 and 2.7%, respectively (difference 1.2% [95% CI -2.8 to 5.3], P = 0.546); numbers needed to treat for 4 years to avoid one event were 21 and 33, respectively. All-cause mortality was reduced nonsignificantly by 22% ([-49 to 18], P = 0.245) and 37% ([-64 to 9], P = 0.98), respectively. The overall safety profile of atorvastatin was similar between age-groups.
Conclusions:
Absolute and relative benefits of statin therapy in older patients with type 2 diabetes are substantial, and all patients warrant treatment unless specifically contraindicated.
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