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Does magnet therapy/magnetic therapy help treat osteoarthritis?

William Pawluk, MD
Preventive Medicine

There have been many studies, especially in regards to the knees. The conclusions reached by the authors, who are almost all academics and rarely personally experienced in the use of magnetic fields, are only modestly positive, indicating some benefit. The authors generally use very stringent criteria to judge the design of the studies to draw their conclusions. These reviews yielded conflicting conclusions regarding pain and function benefits of PEMFs. The process of this research can be painfully slow.

I was very pleased to read a new review with a different perspective regarding the analysis of the available research studies. These authors* reviewed 14 randomized, placebo-controlled trials that included a total of 482 patients in the treatment group and 448 patients in the placebo group. They found no significant effects at any of the time points considered in the effectiveness of PEMFs in treating pain when the data were looked at as a whole. However, when they separated out the trials using high-quality methodology, PEMFs were significantly more effective at 4 and 8 weeks than placebo. For function, a significant improvement was found at 8 weeks after starting treatment, with those receiving active PEMF treatment having 30% better results. They did not find any significant occurrence of adverse events.

Unfortunately, studies often do not differentiate the severity of the individuals entering the trials. Clinically it’s very evident that those with more severe function and who are considerably older do not fare as well with treatment, at least at the four- and eight-week points considered in this review. Many individuals in my experience will begin see improvements right away and then the benefits continue to accumulate the longer the PEMFs are used. Most research trials have to end at some point because of the cost of continuing the research. In clinical practice, individuals may be able to use PEMF therapies for much longer periods of time. It is over the longer period of time that the most results are seen, especially in the more severe situations and in older patients who don’t have the healing capacity of younger people.

*Effects of pulsed electromagnetic field on knee osteoarthritis: a systematic review. Ryang We S, Koog YH, Jeong KI, Wi H. Rheumatology (Oxford). 2012 Apr 13.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.