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Multidrug and optimal heart failure therapy prescribing in older general practice populations: a clinical data linkage study
  1. Claire A Rushton1,
  2. Anna Strömberg2,
  3. Tiny Jaarsma3,
  4. Umesh T Kadam4
  1. 1School of Nursing and Midwifery, Keele University, Stoke-on-Trent, UK
  2. 2Department of Medical and Health Sciences, Linköping University and Department of Cardiology, County Council of Östergötland, Linkoping, Sweden
  3. 3Department of Social and Welfare Studies, Linköping University, Linkoping, Sweden
  4. 4Health Services Research Unit, Keele University, Newcastle-under-Lyme, UK
  1. Correspondence to Claire A Rushton; c.a.rushton{at}keele.ac.uk

Abstract

Objective To investigate multidrug therapy in the cardiovascular disease (CVD) population and whether it was associated with suboptimal drug prescribing in heart failure (HF).

Design A population-based cross-sectional clinical data linkage study.

Setting The clinical database populations were registered with three general practices in North Staffordshire that are part of a research network.

Participants 3155 patients aged 50 years and over were selected on the basis of a CVD-related prescription and a CVD consultation code applied to their electronic medical record in a 2-year time period. All available diagnostic data were linked to all drugs prescribed data during this time period. Two study groups were: (1) HF and (2) non-HF CVD (reference group).

Exposure A standard drug formulary system was used to define four multidrug count categories based on the number of different British National Formulary drug chapters prescribed at the same time.

Primary and secondary outcome measures Optimal HF therapy was defined as the prescribing of ACE inhibitor (ACEi) or a combination of ACEi and β-blocker in the 2-year time window. An additional three specific CVD drug categories that are indicated in HF were also measured.

Results The HF group, compared with the reference group, had higher non-CVD multidrug therapy (26% with 7 or more counts compared with 14% in the non-HF CVD reference group). For the first-choice optimal drug treatment for HF with ACEi (64%) or ACEi and β-blocker combined therapy (23%), the multidrug-adjusted associations between the HF group and the reference group were OR 3.89; 95% CI 2.8 to 5.5 and 1.99; 1.4 to 2.9, respectively. These estimates were not influenced by adjustment for sociodemographic factors and multidrug counts.

Conclusions Multidrug therapy prescribing is much higher in the HF group than in a comparable CVD group but did not influence optimal drug prescribing.

  • Heart Failure
  • Polypharmacy
  • Comorbidity
  • Prescriptions

This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 3.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/3.0/

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