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Q In patients with osteoarthritis of the knee, are glucosamine, chondroitin sulphate, or both more effective than placebo for relief of pain?
Clinical impact ratings GP/FP/Primary care ★★★★★★☆ IM/Ambulatory care ★★★★★☆☆ Rheumatology ★★★★★★☆ Physical medicine & rehabilitation ★★★★★★★
METHODS
Design
randomised placebo controlled trial. (Glucosamine/chondroitin Arthritis Intervention Trial [GAIT]).
Allocation
unclear allocation concealment.*
Blinding
blinded (clinicians and patients).*
Follow-up period
6 months.
Setting
16 clinical centres in the US.
Patients
1583 patients ⩾40 years of age (mean age 59 y, 54% women) who had knee pain for ⩾6 months and on most days of the previous month; radiographic evidence of osteoarthritis; score 125–400 on the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC); and American Rheumatism Association functional class …
Footnotes
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For correspondence: Dr D O Clegg, University of Utah School of Medicine, Salt Lake City, UT, USA. gait.study{at}hsc.utah.edu
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Sources of funding: National Centre for Complementary and Alternative Medicine and National Institute of Arthritis and Musculoskeletal and Skin Diseases.
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