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European Journal of Clinical Pharmacology

, Volume 70, Issue 5, pp 575–581 | Cite as

Prevalence of polypharmacy in a Scottish primary care population

  • R. A. PayneEmail author
  • A. J. Avery
  • M. Duerden
  • C. L. Saunders
  • C. R. Simpson
  • G. A. Abel
Pharmacoepidemiology and Prescription

Abstract

Purpose

Polypharmacy—the use of multiple medications by a single patient—is an important issue associated with various adverse clinical outcomes and rising costs. It is also a topic rarely addressed by clinical guidelines. We used routine Scottish health records to address the lack of data on the prevalence of polypharmacy in the broader, adult primary care population, particularly in relation to long-term conditions.

Methods

We conducted a cross-sectional analysis of adult electronic primary healthcare records and used linear regression models to examine the association between the number of medicines prescribed regularly and both multimorbidity and specific clinical conditions, adjusting for age, gender and socioeconomic deprivation.

Results

Overall, 16.9 % of the adults assessed were receiving four to nine medications, and 4.6 % were receiving ten or more medications, increasing with age (28.6 and 7.4 %, respectively, in those aged 60–69 years; 51.8 and 18.6 %, respectively, in those aged ≥80 years), but relatively unaffected by gender or deprivation. Of those patients with two clinical conditions, 20.8 % were receiving four to nine medications, and 1.1 % were receiving ten or more medications; in those patients with six or more comorbidities, these values were 47.7 and 41.7 %, respectively. The number of medications varied considerably between clinical conditions, with cardiovascular conditions associated with the greatest number of additional medications. The accumulation of additional medicines was less with concordant conditions.

Conclusions

Polypharmacy is common in UK primary care. The main factor associated with this is multimorbidity, although considerable variation exists between different conditions. The impact of clinical conditions on the number of medicines is generally less in the presence of co-existing concordant conditions.

Keywords

Polypharmacy Comorbidity Primary health care Prescribing 

Notes

Acknowledgments

Sponsors/funding

This research received no specific funding

Conflict of interest

None.

Supplementary material

228_2013_1639_MOESM1_ESM.docx (102 kb)
ESM 1 (DOCX 102 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • R. A. Payne
    • 1
    Email author
  • A. J. Avery
    • 2
  • M. Duerden
    • 3
  • C. L. Saunders
    • 1
  • C. R. Simpson
    • 4
  • G. A. Abel
    • 1
  1. 1.Cambridge Centre for Health Services Research, Institute of Public HealthUniversity of CambridgeCambridgeUK
  2. 2.Division of Primary CareUniversity of Nottingham Medical SchoolNottinghamUK
  3. 3.Centre for Health Economics and Medicines EvaluationBangor UniversityBangorUK
  4. 4.Centre for Population Health SciencesThe University of EdinburghEdinburghUK

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