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Compliance and compliance-improving strategies in hypertension: the Japanese experience
Insights
Patient adherence to antihypertensive medication is crucial for treatment success. Once-daily morning dosing significantly improves medication compliance, leading to better long-term adherence and reduced dropout rates in hypertension management.
Area of Science:
- Cardiology
- Pharmacology
- Public Health
Background:
- Antihypertensive treatment adherence is critical for managing hypertension.
- High dropout rates in initial years of treatment pose a significant challenge.
- Understanding factors influencing medication compliance is essential for effective patient care.
Purpose of the Study:
- To analyze medication compliance and dropout rates in patients undergoing antihypertensive treatment.
- To identify factors affecting medication compliance, such as dosing frequency and timing.
- To assess the impact of repeated compliance assessments on patient adherence.
Main Methods:
- Retrospective review of clinical records for 1187 patients initiating antihypertensive therapy (1969-1979).
- Medication compliance estimation via interviews for 381 patients in 1980.
- Analysis of annual dropout rates and compliance percentages (95-100% adherence).
Main Results:
- The annual dropout rate decreased from 21.0% in the first year to approximately 1% after five years.
- 63.8% of patients reported taking 95-100% of their prescribed antihypertensive drugs.
- Medication compliance was higher with once-daily regimens compared to three-times-daily, and morning dosing showed the best compliance.
Conclusions:
- Dosing frequency and timing, particularly once-daily morning regimens, are key determinants of medication compliance in antihypertensive therapy.
- Gradual improvement in compliance was observed with repeated assessments, even without additional interventions.
- Optimizing antihypertensive medication schedules can enhance patient adherence and potentially improve long-term treatment outcomes.
Abstract:
The clinical records of 1187 patients starting antihypertensive treatment during the period 1969-1979 were reviewed at the end of 1983. The annual drop-out rate was 21.0% in the first year, decreased in subsequent years and was about 1% after five years. The medication compliance of 381 patients was estimated by interview in 1980. Of all 381 patients, 243 (63.8%) reported taking 95-100% of prescribed drugs. Medication compliance was related to the frequency and timing of dosing rather than to the number of drugs. Once daily regimens had better compliance than three times daily ones, and medication compliance was greatest for morning dosing, second greatest for evening dosing, and least for dosing at noon. Repeated assessment of medication compliance on three successive years was followed by gradual improvement of compliance without any other intervention.