بررسی مواجهۀ کارکنان یک نیروگاه حرارتی با میدان مغناطیسی در فرکانس بی‏نهایت کم و اثر احتمالی آن بر شدت بی‌خوابی و خواب‌آلودگی آنان

نویسندگان

1 دانشگاه علوم پزشکی تهران

2 دانشگاه علوم پزشکی ایران

10.22052/3.1.31

چکیده

بی‌خوابی ازجمله شایع‌ترین اختلالات خواب است که به‌صورت اشکال در شروع یا تدوام خواب یا بیدار شدنِ صبح زود مطرح می‌شود. خواب‌آلودگی ازجمله عواملی است که با تصادفات رانندگی، حوادث شغلی، کاهش کارایی و مشکلات بین فردی متعددی همراه است. مطالعۀ حاضر با هدف بررسی شدت بی‌خوابی و خواب‌آلودگی کارکنان یک نیروگاه حرارتی شهر تهران که در مواجهه با میدان‌های مغناطیسی با فرکانس بی‌نهایت کم بودند، طراحی شد. مطالعه به‌صورت مورد-شاهد طراحی گردید. به‌منظور بررسی مواجهۀ این دو گروه، برآیند چگالی شار میدان مغناطیسی با فرکانس بی‏نهایت کم توسط دستگاه TES-1934 در محیط کاری و تردد کارکنان اندازه‌گیری شد. از پرسشنامۀ استاندارد شدت بی‌خوابی (ISI) و پرسشنامۀ خواب‌آلودگی اپورث (ESS) جهت بررسی وضعیت شاغلان استفاده شد. حداکثر مواجهه در گروه آزمون و کنترل به‌ترتیب، Tµ 95/2 و Tµ17/0 بود. بین دو گروه از نظر مواجهه با میدان مغناطیسی در فرکانس بی‏نهایت کم، اختلاف معنادار آماری وجود داشت (001/0p < ). از نظر شدت بی‌خوابی، تفاوت معنادار آماری بین گروه کنترل و آزمون وجود داشت (015/0=p)، اما ازلحاظ خواب‌آلودگی، اختلافی مشاهده نشد (51/0=p). هرچند میزان مواجهه در گروه‌های مختلف شغلی از حدود مواجهۀ شغلی بالاتر نبود، درجاتی از شدت بی‌خوابی در کارکنانِ در معرض مشاهده گردید. این امر می‌تواند نقش احتمالی این میدان‌ها در اختلالات خواب را نشان دهد. افزایش تعداد نمونه‌ها و همچنین انجام مطالعات عینی و آزمایشگاهی، می‌تواند گویای نتایج روشن‌تر از این اثرات باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Survey of extremely low frequency magnetic fields exposure of the thermal power plant employees and its possible effect on insomnia severity and sleepiness

نویسندگان [English]

  • mohammad Reza monazzam 1
  • Hamed jalilian 2
  • Kamran najafi 1
  • Seyyed Abolfazl zakerian 1
  • Ghasem zare 2
چکیده [English]

Insomnia is one of the most common sleep disorders, characterized by difficulties in sleep initiation, sleep maintenance or early morning awakening. Sleepiness is also such issues that associated with driving accidents, work accidents, and reduces efficiency and numerous interpersonal difficulties. The aim of the present study is to evaluate the severity of insomnia and sleepiness workers who were exposed to extremely low frequency magnetic fields in one of thermal power plants in Tehran as a case-control study. In order to exposure evaluation of these groups, resultant magnetic flux density with extremely low frequency was measured with TES-1394 device in workplace and commuting of worker. Insomnia severity index and Epworth Sleepiness scale was used to assess insomnia and sleepiness status and depression. The maximum exposure in case and control group was 2.95 µT and 0.17 µT, respectively. There are significant differences in extremely low frequency magnetic field exposure between case and control groups (p < 0.001).There were significant differences between case and control groups in severity of insomnia (p=0.015), but no statistically significant differences were observed in sleepiness (p=0.51). However exposure in different works group was lower than exposure limit, but levels of the insomnia have observed in them and this possibly shows the probabilistic effect of ELF magnetic fields. Increase in the sample size, experimental and subjective tests can clear these effects.

کلیدواژه‌ها [English]

  • Occupational exposure
  • ELF Magnetic Fields
  • Insomnia
  • Sleepiness
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