Ann Rheum Dis 2001;60:1123-1130 ( December )

Extended report

Effectiveness of exercise in patients with osteoarthritis of hip or knee: nine months' follow up M E van Baar^a, J Dekker^{a b}, R A B Oostendorp^c, D Bijl^a, Th B Voorn^d, J W J Bijlsma^e

^a Netherlands Institute of Primary Health Care, Utrecht, The Netherlands, ^b Institute of Research in Extramural Medicine, Vrije Universiteit, Amsterdam, The Netherlands, ^c Dutch National Institute of Allied Health Professions, Amersfoort, The Netherlands, ^d Department of General Practice, Utrecht University, Utrecht, The Netherlands, ^e Department of Rheumatology and Immunology, University Hospital, Utrecht, The Netherlands

Correspondence to: Dr M E van Baar, Nivel, PO Box 1568, 3500 BN, Utrecht, The Netherlands v.d.m.dehaas{at}kub.nl

Accepted for publication 23 April 2001

OBJECTIVETo determine whether the effects of an exercise programme in patients with osteoarthritis of hip or knee are sustained at six and nine months' follow up.
METHODSA randomised, single blind, clinical trial was conducted in a primary care setting. Patients with osteoarthritis of hip or knee (ACR criteria) were selected. Two intervention groups were compared. Both groups received treatment from their general practitioner, including patient education and drug treatment if necessary. The experimental group also received exercise treatment from a physiotherapist in primary care. The treatment period was 12 weeks, with an ensuing 24 week follow up. The main outcome measures were pain, drug use (non-steroidal anti-inflammatory drugs), and observed disability.
RESULTS201 patients were randomly allocated to the exercise or control group, and 183 patients completed the trial. At 24 weeks exercise treatment was associated with a small to moderate effect on pain during the past week (difference in change between the two groups 11.5 (95% CI 19.7 to 3.3). At 36 weeks no differences were found between the groups.
CONCLUSIONSBeneficial effects of exercise decline over time and finally disappear.

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© 2001 by Annals of the Rheumatic Diseases
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