Department of Health Sciences, University of York, Heslington, York, United Kingdom.
PLoS One. 2013 Sep 16;8(9):e71529. doi: 10.1371/journal.pone.0071529. eCollection 2013.
Folklore remedies for pain and inflammation in rheumatoid arthritis include the application of magnets and copper to the skin. Despite the popular use of devices containing magnets or copper for this purpose, little research has been conducted to evaluate the efficacy of such treatments.
To investigate whether the practice of wearing magnetic wrists straps, or copper bracelets, offers any specific therapeutic benefit for patients with rheumatoid arthritis.
Randomised double-blind placebo-controlled crossover trial.
70 patients, aged 33 to 79 years and predominantly female (n = 52), with painful rheumatoid arthritis were recruited from general practices within Yorkshire. Participants were randomly allocated to wear four devices in a different order. Devices tested were: a standard (1502 to 2365 gauss) magnetic wrist strap, a demagnetised (<20 gauss) wrist strap, an attenuated (250 to 350 gauss) magnetic wrist strap, and a copper bracelet. Devices were each worn for five weeks, with treatment phases being separated by one week wash-out periods. The primary outcome measured was pain using a 100 mm visual analogue scale. Secondary pain measures were the McGill Pain Questionnaire and tender joint count. Inflammation was assessed using C-reactive protein and plasma viscosity blood tests and by swollen joint count. Physical function was assessed using the Health Assessment Questionnaire (Disability Index). Disease activity and medication use was also measured.
65 participants provided complete self-report outcome data for all devices, four participants provided partial data. Analysis of treatment outcomes did not reveal any statistically significant differences (P>0.05) between the four devices in terms of their effects on pain, inflammation, physical function, disease activity, or medication use.
Wearing a magnetic wrist strap or a copper bracelet did not appear to have any meaningful therapeutic effect, beyond that of a placebo, for alleviating symptoms and combating disease activity in rheumatoid arthritis.
Controlled-Trials.com ISRCTN51459023 ISRCTN51459023.
民间疗法中，人们会将磁铁或铜片贴在皮肤上，以缓解类风湿关节炎引起的疼痛和炎症。尽管有许多人使用带有磁铁或铜片的设备来进行治疗，但针对这些疗法疗效的研究却很少。
研究佩戴磁腕带或铜手镯是否对类风湿关节炎患者有特殊的治疗益处。
随机双盲安慰剂对照交叉试验。
在约克郡的常规医疗实践中招募了 70 名年龄在 33 岁至 79 岁之间且以女性为主（n = 52）的疼痛性类风湿关节炎患者。参与者被随机分配以不同的顺序佩戴四种设备。测试的设备包括：标准（1502 至 2365 高斯）磁腕带、退磁（<20 高斯）腕带、衰减（250 至 350 高斯）磁腕带和铜手镯。每种设备佩戴 5 周，每个治疗阶段之间间隔 1 周洗脱期。主要测量结果是使用 100mm 视觉模拟量表评估疼痛。次要疼痛测量包括麦吉尔疼痛问卷和压痛关节计数。使用 C 反应蛋白和血浆粘度血液检查以及肿胀关节计数评估炎症。使用健康评估问卷（残疾指数）评估身体功能。还测量了疾病活动度和药物使用情况。
65 名参与者提供了所有设备的完整自我报告结果数据，4 名参与者提供了部分数据。对治疗结果的分析并未显示四种设备在缓解疼痛、炎症、身体功能、疾病活动度或药物使用方面有任何统计学上的显著差异（P>0.05）。
佩戴磁腕带或铜手镯似乎没有任何有意义的治疗效果，除了安慰剂之外，无法缓解类风湿关节炎的症状和控制疾病活动。
Controlled-Trials.com ISRCTN51459023 ISRCTN51459023。
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