Study on Statin Medication Nonadherence Among Seniors
Overview of Statin Medications
A recent study investigated the rates of nonadherence and discontinuation of statin medications among seniors. Statin medications play a crucial role in reducing a patient’s risk of cardiovascular disease by lowering cholesterol levels. High cholesterol is a significant risk factor for heart disease, and statin therapy typically requires once-daily or alternate-day dosing.
Background on Nonadherence
Previous research has indicated that individuals over the age of 65 often do not adhere to their statin medication regimens properly. Nonadherence and discontinuation of statin therapy can elevate the risk of heart attacks or strokes.
Research Details
Researchers from the Centre of Cardiovascular Research and Education in Therapeutics in Melbourne, Australia, conducted the study to explore factors contributing to low adherence and high discontinuation rates among seniors. The findings were published in the British Journal of Clinical Pharmacology. The study analyzed data from over 22,000 Australian seniors who began statin therapy between January 1, 2014, and December 31, 2015. Adherence rates were assessed by monitoring when patients refilled their statin prescriptions at pharmacies.
Key Findings
The study revealed that more than half of the participants who started statin therapy were nonadherent within the first year. Additionally, over 40% of patients discontinued their statin therapy during this time frame, aligning with previous reports.
Factors Influencing Nonadherence
The researchers identified several factors associated with nonadherence and discontinuation of statin medications. Patients with diabetes, anxiety, or pain disorders exhibited higher rates of nonadherence. Interestingly, when statins were prescribed by general practitioners, adherence rates were lower, and discontinuation rates were higher. In contrast, patients taking atorvastatin (Lipitor) and rosuvastatin (Crestor) showed better adherence and lower discontinuation rates compared to those on simvastatin (Zocor). Patients with conditions such as high blood pressure, angina, and congestive heart failure were more likely to adhere to their statin medications, as were those taking five or more medications.
The Role of Specialists in Improving Adherence
The researchers speculated that adherence rates might improve when statin medications are prescribed by specialists. Patients consulting with cardiologists may recognize the severity of their cardiovascular conditions and perceive the importance of adhering to medication regimens. Furthermore, patients managing multiple medications likely have a heightened awareness of the significance of their treatments.
Concerns Regarding Side Effects
Patients experiencing anxiety may worry about the potential side effects of statin therapy, which could lead to discontinuation without consulting their healthcare providers. These reasons for nonadherence are speculative and warrant further investigation. Understanding the underlying causes of nonadherence can empower clinicians to better educate and motivate patients to follow their statin therapy.
Conclusion
The researchers concluded that their findings align with previous reports regarding the nonadherence to statin medications among older patients. They affirmed the existence of poor adherence rates while analyzing potential contributing factors. Further exploration of these reasons may foster improved communication strategies to emphasize the importance of statin medications to patients.
Written by Jessica Caporuscio, PharmD
Reference: Ofori-Asenso R, Ilomaki J, Tacey M, et al. Predictors of First-Year Nonadherence and Discontinuation of Statins among Older Adults: A Retrospective Cohort Study. Br J Clin Pharmacol. 2018.