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Predictors of adherence with antihypertensive and lipid-lowering therapy

Richard H Chapman1, Joshua S Benner, Allison A Petrilla

  • 1ValueMedics Research, LLC, Arlington, VA, USA. rick.chapman@valuemedics.com

Archives of Internal Medicine
|May 25, 2005
PubMed

Insights

Patient adherence to both antihypertensive (AH) and lipid-lowering (LL) medications is low, with only one-third of patients remaining compliant at six months. Concomitant initiation of AH and LL therapy may improve adherence.

Area of Science:

  • Cardiovascular Medicine
  • Pharmacoeconomics
  • Health Services Research

Background:

  • Comorbid hypertension and dyslipidemia significantly increase cardiovascular disease (CVD) risk.
  • Effective CVD risk mitigation relies on patient adherence to prescribed antihypertensive (AH) and lipid-lowering (LL) therapies.
  • Understanding adherence patterns and predictors for combined AH and LL therapy is crucial.

Purpose of the Study:

  • To describe adherence patterns with concomitant antihypertensive (AH) and lipid-lowering (LL) therapy.
  • To identify predictors of adherence in patients with comorbid hypertension and dyslipidemia.

Main Methods:

  • Retrospective cohort study of 8406 managed care enrollees initiating both AH and LL therapy.
  • Adherence measured as proportion of days covered (≥80%) for both medication classes over 12.9 months mean follow-up.
  • Multivariate regression analysis to identify adherence predictors.

Main Results:

  • Adherence to both AH and LL therapy declined sharply: 44.7% at 3 months, 35.9% at 6 months, and 35.8% at 12 months.
  • Predictors of higher adherence included concomitant initiation of AH and LL therapy, history of coronary heart disease or congestive heart failure, and fewer concomitant medications.
  • Poor adherence was observed, with only about one in three patients compliant at six months.

Conclusions:

  • Adherence to concomitant antihypertensive (AH) and lipid-lowering (LL) therapy is suboptimal.
  • Initiating AH and LL therapy together and reducing pill burden are potential strategies to improve patient adherence.
  • Targeted interventions are needed to enhance long-term adherence in high-risk cardiovascular patients.
Abstract

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