Background: Symptomatic osteoarthritis poses a major challenge to primary health care but no studies have related accessing primary care ('detection'), receiving recommended treatments ('treatment'), and achieving adequate control ('control').
Objective: To provide estimates of detection, treatment, and control within a single population adapting the approach used to determine a Rule of Halves for other long-term conditions.
Setting: General population.
Participants: 400 adults aged 50+ years with prevalent symptomatic knee osteoarthritis.
Design: Prospective cohort with baseline questionnaire, clinical assessment, and plain radiographs, and questionnaire follow-up at 18 and 36 months and linkage to primary care medical records.
Outcome measures: 'Detection' was defined as at least one musculoskeletal knee-related GP consultation between baseline and 36 months. 'Treatment' was self-reported use of at least one recommended treatment or physiotherapy/hospital specialist referral for their knee problem at all three measurement points. Pain was 'controlled' if characteristic pain intensity <5 out of 10 on at least two occasions.
Results: In 221 cases (55.3%; 95%CI: 50.4, 60.1) there was evidence that the current problem had been detected in general practice. Of those detected, 164 (74.2% (68.4, 80.0)) were receiving one or more of the recommended treatments at all three measurement points. Of those detected and treated, 45 (27.4% (20.5, 34.3)) had symptoms under control on at least two occasions. Using narrower definitions resulted in substantially lower estimates.
Conclusion: Osteoarthritis care does not conform to a Rule of Halves. Symptom control is low among those accessing health care and receiving treatment.
Keywords: Osteoarthritis; Primary care; Rule of Halves.
Copyright © 2014 Osteoarthritis Research Society International. Published by Elsevier Ltd. All rights reserved.