STATIC MAGNETS FOR THE TREATMENT OF OSTEOARTHRITIS OF THE KNEE

Tagged:  

MAGNETOTHERAPY
OSTEOARTHRITIS
KNEE
PLACEBO (Medicine) -- Therapeutic use

Abstract:Context Outpatient clinical studies of magnet therapy, a complementary therapy commonly used to treat osteoarthritis (0.1), haw been limited by the absence of a credible placebo control. Objective • Our objective was to assess the feasibility and promise of studying stain magnetic therapy of knee OA and determine the ability of a new placebo-magnet device to provide concealment of group assignment. Design Randomized, double-blind, placebo controlled clinical trial. Setting Academic teaching hospital in Boston. Participants We enrolled 29 subject with idiopathic or post-traumatic OA of the knee: Interventions either high-strength magnetic (active) or plecebo-magnetic (placebo) knee sleeve treatment for 4 hours in a monitored setting and self-treatment 6 hours daily for 6 weeks Main Outcome Measures Primary outcomes were change in knee pain as measured by the WOMAC Osteoarthritis Index Pain Subscale 6 weeks and extent of group concealment at study end. Results At 4 hours, VAS pain scores (±SE) on a 5-item scale (0-500, 500 worst) decreased 79±18 nun in the active group and 10±21 win in the placebo group (P<0.05). Their were no significant difference in any primary or secondary measure of efficacy between the treatment groups at 6 weeks. Despite widespread testing for Widespred testing for magnetic properties. 69% of the active group and 77%, of the placebo group (P>0.2) believed that they had been assigned to the active treatment group. Conclusion Despite our small sample size, magnets showed statistically significant efficacy compared to placebo after 4 hours under rigorously controlled conditions. The sustained efficacy of magnetic therapy for knee osteoarthritis could be assessed in an adequately powered trial utilizing an appropriate control such our new placebo-magnet device.

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