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Polymyalgia rheumatica in primary care: a cohort study of the diagnostic criteria and outcome

Kevin Barraclough1, William G Liddell, Jennifer du Toit

  • 1Hoyland House General Practice, Painswick, Glos, UK.

Family Practice
|August 9, 2008
PubMed
Abstract

Insights

Primary care doctors often diagnose polymyalgia rheumatica (PMR) without standard criteria, sometimes even with normal inflammatory markers. This practice may lead to unnecessary corticosteroid use in patients.

Area of Science:

  • Rheumatology
  • Primary Care Medicine
  • Clinical Epidemiology

Background:

  • Polymyalgia rheumatica (PMR) is a common condition frequently managed in primary care settings.
  • Currently, there is a lack of universally accepted diagnostic criteria for PMR within primary care.

Purpose of the Study:

  • To determine the diagnostic features utilized by primary care practitioners for PMR.
  • To compare these features against established diagnostic criteria.
  • To identify prognostic indicators present at diagnosis that predict disease course.

Main Methods:

  • A retrospective cohort study was conducted involving patients diagnosed with PMR in three UK general practices from 1994 to 2003.
  • Medical records were analyzed to identify key diagnostic features of PMR.
  • Duration of corticosteroid treatment served as a proxy for disease duration, and Cox proportional hazards models were used for prognostic analysis.

Main Results:

  • 183 patients were identified, with an annual incidence of 11.3 per 10,000 individuals aged 50+.
  • Common diagnostic features included proximal muscle pain (82%), elevated inflammatory markers (87%), and response to corticosteroids (91%).
  • Female sex and elevated inflammatory markers were independently linked to longer treatment durations.

Conclusions:

  • Primary care physicians often diagnose PMR without adhering to established criteria.
  • The condition is sometimes diagnosed despite normal inflammatory marker levels.
  • This diagnostic approach poses a risk of inappropriate corticosteroid exposure for patients.

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