Clinical Scorecard: Assessment of Statin Therapy Adherence: A Systematic Review and Meta-Analysis of Prevalence and Influencing Factors
At a Glance
Category
Detail
Condition
Atherosclerotic cardiovascular disease (ASCVD) prevention and treatment
Key Mechanisms
Statins lower LDL cholesterol to reduce cardiovascular risk; adherence to therapy is critical for effectiveness
Target Population
Adults prescribed statin monotherapy for primary or secondary prevention of ASCVD
Care Setting
Outpatient and community settings involving long-term lipid-lowering therapy
Key Highlights
Pooled prevalence of good adherence (≥80% medication use) to statins is 62.4%, lower in primary prevention (57.5%) than secondary prevention (64.4%).
Lower adherence is associated with female sex, younger age, Black or Hispanic ethnicity, smoking, depression, and heart failure.
Higher adherence is observed among older adults, patients with myocardial infarction, hypertension, multiple comorbidities, and those on polypharmacy (≥5 medications).
Guideline-Based Recommendations
Diagnosis
Use pharmacy refill data metrics such as Proportion of Days Covered (PDC) or Medication Possession Ratio (MPR) to assess adherence.
Define good adherence as ≥80% medication consumption for prognostic relevance.
Management
Implement targeted interventions to improve adherence, especially in high-risk groups with suboptimal adherence.
Focus on populations with identified lower adherence including women, younger adults, racial minorities, smokers, and patients with depression or heart failure.
Monitoring & Follow-up
Regularly monitor adherence over long-term follow-up (median 24 months) to identify and address lapses.
Consider demographic and clinical factors influencing adherence when evaluating patient progress.
Risks
Poor adherence leads to failure to achieve LDL-C targets, increased major acute cardiovascular events, and higher all-cause and cardiovascular mortality.
Non-adherence increases healthcare burden due to recurrent hospitalizations and economic costs.
Patient & Prescribing Data
Nearly 6 million adults from 76 studies with median 24 months follow-up on statin monotherapy.
Despite robust evidence and guidelines, nearly 4 in 10 patients do not maintain adequate adherence, highlighting the need for improved strategies.
Clinical Best Practices
Assess adherence routinely using validated pharmacy refill metrics (PDC, MPR) with ≥80% threshold.
Identify patients at risk for poor adherence based on demographic and clinical factors to tailor interventions.
Promote adherence especially in primary prevention populations where adherence is lower.
Leverage polypharmacy context as an opportunity for enhanced adherence through intensified medical supervision.
Address psychosocial factors such as depression and smoking cessation to improve medication-taking behavior.
by Athanasios Basios, Georgios Markozannes, Evangelia E Ntzani, Konstantinos Christopoulos, Christina A Chatzi, Evangelos Liberopoulos, Konstantinos K Tsilidis, Maria Pappa, Evangelos C Rizos
