研究のタイプ: 疫学研究 (observational study)

[発電所労働者の血清脂質に対する電磁界の影響] epidem.

Effects of electromagnetic fields on serum lipids in workers of a power plant.

掲載誌: Environ Sci Pollut Res Int 2016; 23 (3): 2495-2504

この研究は、発電所の労働者において、血清脂質に対する電磁界EMF)の影響を調べた横断研究である。調査は中国・浙江省の1つの発電所で2011年8-9月に実施された。調査参加者は、職業的EMF(無線周波および超低周波電磁界を含む)への高ばく露群と低ばく露群へ2分された。雇用期間が長く、1日のEMFばく露時間が長く、1ヵ月の携帯電話代または電気料金が高い傾向にある高ばく露群では、総コレステロール、低密度リポ蛋白コレステロール、トリグリセライドのレベルが低ばく露群より有意に高かった、など単純に集計した結果を報告している。

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研究の目的(著者による)

A cross-sectional study was conducted in China to evaluate the effects of exposure to electromagnetic fields on levels of serum lipids in workers of an electric power plant.

詳細情報

The results on plasma hormonal and inflammatory pathway biomarkers in 154 participants of same study population were published by Wang et al (2015).
A blood sample was taken from each participant to analyze serum lipid levels.
Occupational exposure to electromagnetic fields included radiofrequency and extremely low-frequency electromagnetic fields. Remark EMF-Portal: The parameters for classification into 'low occupational EMF exposure' and 'high occupational EMF exposure' are not stated.

影響評価項目/リスク推定のタイプ

リスク推定のタイプ:

ばく露

ばく露評価

ばく露集団

グループ 説明
参照集団 1 low occupational exposure
集団 2 high occupational exposure
参照集団 3 low occupational exposure, employment duration: < 24 years
集団 4 low occupational exposure, employment duration: ≥ 24 years
集団 5 high occupational exposure, employment duration: < 24 years
集団 6 high occupational exposure, employment duration: ≥ 24 years
参照集団 7 low occupational exposure, daily duration: < 3.37 hours/day
集団 8 low occupational exposure, daily duration: ≥ 3.37 hours/day
集団 9 high occupational exposure, daily duration: < 3.37 hours/day
集団 10 high occupational exposure, daily duration: ≥ 3.37 hours/day
参照集団 11 low occupational exposure: no Walkie Talkie use
集団 12 low occupational exposure: Walkie Talkie use
集団 13 high occupational exposure: no Walkie Talkie use
集団 14 high occupational exposure: Walkie Talkie use
参照集団 15 low occupational exposure and monthly electric fee: < 150 yuan/month
集団 16 low occupational exposure and monthly electric fee: ≥ 150 yuan/month
集団 17 high occupational exposure and monthly electric fee: < 150 yuan/month
集団 18 high occupational exposure and monthly electric fee: ≥ 150 yuan/month
参照集団 19 low occupational exposure and mobile phone fee: < 55 yuan/month
集団 20 low occupational exposure and mobile phone fee: ≥ 55 yuan/month
集団 21 high occupational exposure and mobile phone fee: < 55 yuan/month
集団 22 high occupational exposure and mobile phone fee: ≥ 55 yuan/month

調査対象集団

調査規模

タイプ
合計 2,138
適格者 1,073
参加者 814
統計学的分析方法:

結論(著者による)

The average intensity of occupational EMF was 316.3±1212.3 V/m for electric field and 6.17±14.71 µT for magnetic fields in high exposure group, which far outstripped that in low exposure group (3.9±0.3 V/m and 60.6±16.9 nT, respectively).
High occupational exposure to electromagnetic fields (group 2) was associated with an increased level of LDL cholesterol compared to the reference group 1. No statistically significant associations between exposure to electromagnetic fields and serum levels of total cholesterol, HDL-cholesterol and triglyceride were found.
High exposure groups with longer employment duration, longer daily exposure duration, more mobile phone or electric fee per month had significantly higher levels of total cholesterol, LDL-cholesterol, or triglyceride than the corresponding reference group. Significantly decreased level of HDL cholesterol was only observed in high EMF exposure group with more mobile phone fee per month. Similar results were also found in 544 participants with available data of serum lipids in 2010.
The authors concluded that chronic exposure to electromagnetic fields was associated with the change of serum lipid levels.

研究助成

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