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 ORIGINAL ARTICLE
Year : 2010  |  Volume : 14  |  Issue : 3  |  Page : 66-70

Oxidative stress, melatonin level, and sleep insufficiency among electronic equipment repairers


1 Department of Public Health and Preventive Medicine, Faculty of Medicine, Mansoura University, Mansoura, Egypt
2 Department of Clinical Pathology, Faculty of Medicine, Mansoura University, Mansoura, Egypt

Correspondence Address:
Mohamed El-Helaly
Department of Public Health and Community Medicine, Faculty of Medicine, Mansoura University, PO - 355 16, Mansoura
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0019-5278.75692

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Background: Exposure to extremely low frequency electromagnetic field (ELF-EMF), especially among electronic equipment repairers may induce oxidative stress and affect sleep quality. Aims: This study was carried out to (a) investigate the effect of exposure to ELF-EMF on the malondialdehyde (MDA) levels among electronic equipment repairers as an indicator of oxidative stress; and melatonin hormone levels; and (b) to study the prevalence of sleep insufficiency among electronic equipment repairers exposed to ELF-EMF. Materials and Methods: A cross-sectional study was carried out on 50 electronic equipment repairers at high risk of exposure to ELF-EMF, and a matched control group at lower risk of exposure to ELF-EMF. All the participants completed a self-administered questionnaire about medical and occupational histories; and sleep sufficiency. The plasma melatonin and MDA levels of the study subjects were assessed. Results: The mean level of serum melatonin in the electronic equipment repairers was lower than that of the controls (P < 0.01). Moreover, serum MDA mean level of the electronic equipment repairers was higher than that of the controls (P < 0.01). Sleep insufficiency was more frequent among electronic equipment repairers (18.00%) in comparison with the controls (8.70%) (P > 0.05). Conclusion: The electronic equipment repairers, exposed to ELF-EMF, are at a risk of oxidative stress and sleep insufficiency, which could be explained by lower plasma melatonin levels and higher MDA levels. Health education about the hazards of ELF-EMF, shortening of exposure time per day, and taking antioxidant vitamins should be done to ameliorate the oxidative effect of EMF on those workers.






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