Effect of magnets on chronic pelvic pain*.
Brown CS, Parker N, Ling F, Wan J.
University of Tennessee, Memphis, TN, USA
Objective: Magnetic therapy has been used to manage a variety of chronic pain
syndromes. Chronic pelvic pain (CPP) is a common disorder that does not
always respond to conventional treatments. The primary aim of this study was
to determine if applying magnets to abdominal trigger points would
significantly relieve pain.Methods: Patients with CPP between 18 and 50 years
of age were enrolled in a 2-week, double-blind, placebo-controlled study with
an optional 2-week blinded continuation phase. Women who completed
single-blind treatment were randomized to receive either active or placebo
500 Gauss magnets for 24 hours per day. The McGill Pain Questionnaire (MPQ)
and the Pain Disability Index (PDI) were used.Results: Fourteen subjects
completed the 2-week study, and eight subjects completed the continuation
phase. There was no significant treatment effect using repeated measures
analysis. Of the eight treatment extenders, 60% with active magnets compared
with 33% with placebo magnets had 50% reductions in MPQ and PDI scores. A
power analysis revealed that 16 subjects were necessary to show a significant
effect after 4 weeks of treatment. Blinding was more effective in the placebo
group than in the active magnet group and at 2 weeks than at 4
weeks.Conclusions: This first controlled study of magnetic therapy for CPP
suggests that pain relief is related to duration of exposure. The ongoing
trial will report on the effect of longer exposure periods and blinding
efficacy with a larger sample.
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Revision r1.1 - 31 May 2001 - 21:47 by EliMantel
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