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Determinants of compliance with anticoagulation: A case-control study
J H Arnsten1, J M Gelfand, D E Singer
1General Internal Medicine Unit, Massachusetts General Hospital, Boston USA.
The American Journal of Medicine
|July 1, 1997
Summary
Patients not complying with warfarin therapy are often younger, male, and nonwhite. Improving patient education and physician involvement can enhance anticoagulation compliance, especially in at-risk groups.
Area of Science:
- Medical research
- Pharmacology
- Patient adherence
Background:
- Long-term anticoagulation use has significantly increased.
- Patient compliance is crucial for safe and effective anticoagulation therapy.
- Barriers to anticoagulation compliance have not been well-studied.
Purpose of the Study:
- To investigate the characteristics and barriers associated with noncompliance in patients undergoing anticoagulation therapy.
- To identify factors contributing to poor adherence to warfarin medication.
Main Methods:
- A case-control study was conducted at the Anticoagulation Therapy Unit (ATU).
- Forty-three noncompliant patients (cases) were compared with 89 compliant patients (controls).
- Interviews assessed sociodemographic data, medical history, satisfaction, and health beliefs regarding anticoagulation.
Main Results:
- Noncompliant patients were younger, more likely to be male and nonwhite, and less likely to have a history of stroke or transient ischemic attack.
- Lack of understanding regarding warfarin's purpose and absence of a regular physician were associated with noncompliance.
- Noncompliant patients reported greater burden and perceived fewer benefits from warfarin therapy.
Conclusions:
- Distinct clinical characteristics identify patients at higher risk for warfarin noncompliance.
- Younger, male patients without a history of thromboembolic events require targeted interventions.
- Enhanced patient education, physician engagement, and simplified monitoring can improve anticoagulation adherence.