Measuring patient compliance in antihypertensive therapy--some methodological aspects

Area of Science:

• Pharmacology
• Health Services Research

Background:

• Assessing patient compliance with antihypertensive medications is crucial for treatment success.
• Prescription refilling patterns offer a potential method for monitoring adherence.

Purpose of the Study:

• To evaluate the utility of prescription refilling patterns in assessing patient compliance with antihypertensive drugs.
• To determine the reliability of prescription monitoring over different follow-up periods.

Main Methods:

• Retrospective study of 331 subjects on antihypertensive drugs over 1- and 2-year periods.
• Analysis of prescription refilling patterns and patient interviews to identify noncompliance.
• Assessment of factors like hospital stays and verbal orders on compliance data.

Main Results:

• Compliance distribution was J-shaped, with a slight decrease in compliant patients over the 2-year period.
• A 0.7 cutoff identified 34% noncompliers; patient interviews revealed an additional 5% early drop-outs.
• Prescription monitoring proved reliable, with external factors minimally impacting overall compliance distribution.

Conclusions:

• Prescription refilling patterns are a valuable tool for assessing patient compliance in antihypertensive therapy.
• This method is applicable and useful in both research settings and daily clinical practice.
• Monitoring prescription refills provides a practical approach to understanding medication adherence.