Journal
CLINICAL REHABILITATION
Volume 19, Issue 3, Pages 255-263Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1191/0269215505cr864oa
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Objective: To examine the effects of pulsed short- wave diathermy ( PSWD), delivered at an intensity sufficient to induce a thermal sensation and at an athermal intensity, in comparison with a placebo short- wave diathermy treatment, on reported pain, stiffness and functional ability and on mobility performance of patients with osteoarthritis of the knee. Design: A placebo- controlled double- blind trial with sequential allocation of patients to different treatment groups. Setting: Outpatient physiotherapy department. Subjects: One hundred and three consecutive patients, mean age 73.7 ( +/- 6.6) years with osteoarthritis of one or both knees for at least three months. Interventions: All participants received three 20- min- long treatments per week for three weeks. One group received PSWD with mean power of 18 W ( thermal effect), one group received PSWD with mean power of 1.8 W ( athermal effect), and one group received sham short- wave diathermy treatment. Patients were assessed before the initial treatment, immediately following the last treatment, and at a three- month follow- up. Main measures: Outcome measures included the WOMAC Osteoarthritis Index, which assessed reported pain, stiffness, and functional ability, and four measures of mobility performance: Timed Get Up and Go test ( TGUG), stair- climbing, stair-descending and a 3- min walk. Results: A difference across time was observed for the pain and stiffness categories of the WOMAC Osteoarthritis Index ( p = 0.033 and p = 0.008, respectively), with no differences between groups. No other significant differences across time or between groups were observed in any of the other measures. Conclusion: The findings do not demonstrate pulsed short- wave diathermy, as it is utilized in clinical settings, to be effective in the treatment of osteoarthritis of the knee.
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