Extremely low-frequency electromagnetic fields (ELF-EMFs) may cause negative health effects. This study aimed to investigate the direct and indirect effects of chronic exposure to extremely low-frequency electric and magnetic fields on the prevalence of musculoskeletal disorders (MSDs). In this cross-sectional study, 152 power plant workers were enrolled. The exposure level of employees was measured based on the IEEE Std C95.3.1 standard. Superoxide dismutase (SOD), catalase (Cat), glutathione peroxidase (GPx), total antioxidant capacity (TAC), and malondialdehyde (MDA) (independent variables) were measured in the serum of subjects. The Nordic musculoskeletal questionnaire was used to assess MSDs (dependent variable). The mean exposure of electric and magnetic fields were 4.09 V/m (standard deviation [SD] = 4.08) and 16.27 µT (SD = 22.99), respectively. Increased levels of SOD, Cat, GPx, and MDA had a direct significant relation with MSDs. In the logistic regression model, SOD (odds ratio [OR] = 0.952, P = 0.026), GPx (OR = 0.991, P = 0.048), and MDA (OR = 0.741, P = 0.021) were significant predictors of MSDs. ELF-EMFs were not related to MSDs directly; however, increased levels of oxidative stress may cause MSDs. Bioelectromagnetics. 2019;40:354-360. © 2019 Bioelectromagnetics Society.

中文翻译：

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极低频电磁场对肌肉骨骼疾病患病率和氧化应激作用的影响。

极低频电磁场（ELF-EMF）可能会对健康造成负面影响。这项研究旨在调查长期暴露于极低频电场和磁场对肌肉骨骼疾病（MSD）患病率的直接和间接影响。在这项横断面研究中，有152名电厂工人参加了研究。员工的暴露水平是根据IEEE Std C95.3.1标准进行测量的。在受试者血清中测量了超氧化物歧化酶（SOD），过氧化氢酶（Cat），谷胱甘肽过氧化物酶（GPx），总抗氧化剂能力（TAC）和丙二醛（MDA）（独立变量）。使用北欧肌肉骨骼问卷来评估MSD（因变量）。电场和磁场的平均暴露为4.09 V / m（标准偏差[SD] = 4.08）和16.27 µT（SD = 22.99），分别。SOD，Cat，GPx和MDA含量的增加与MSDs直接相关。在逻辑回归模型中，SOD（优势比[OR] = 0.952，P = 0.026），GPx（OR = 0.991，P = 0.048）和MDA（OR = 0.741，P = 0.021）是MSD的重要预测指标。ELF-EMF与MSD没有直接关系；但是，增加的氧化应激水平可能会导致MSD。生物电磁学。2019; 40：354-360。©2019生物电磁学会。354-360。©2019生物电磁学会。354-360。©2019生物电磁学会。