研究のタイプ: 医学／生物学の研究 (experimental study, observational study)

[携帯電話基地局の近くにおけるEMF防護下での睡眠研究] med./bio.

[EMF-protection sleep study near mobile phone base stations]

著者: Leitgeb N, Schröttner J, Cech R, Kerbl R
掲載誌: Somnologie (Somnology) 2008; 12 (3): 234-243
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この研究は、自分の睡眠障害を携帯電話基地局RF電磁界を原因と考えているボランティア43人（女性26、男性17）を対象に、睡眠実験室で、彼らの睡眠障害の原因としてのRF電磁界の潜在的な役割を調べた。睡眠実験室に、RFの真の遮蔽、擬似遮蔽、遮蔽なし（対照）の3つの条件を設定し、各被験者は無作為の順番で、3つの条件下での睡眠実験を行った。実験は、遮蔽条件については単純ブラインド、データ分析については二重ブラインドで行った。全部で465夜について、翌朝の質問票調査と睡眠ポリグラフ測定を行った。その結果、実験室へ進入したRF電磁界強度または基地局信号強度に依存して統計学的に有意な変化を示した睡眠パラメータはなかった；7人のボランティアが、主観的な睡眠パラメータに対する有意なプラセボ効果を示した、などを報告している。

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研究目的（著者による）

To study the potential impact of radiofrequency electromagnetic fields of transmitters on the sleep quality of nearby residents, a new study design is presented: In a cross-over study the effect of on-site shielding rather than of additional exposure, was examined.

詳細情報

The study was performed in the homes of volunteers under real environmental field conditions (i.e. in the bedrooms of the subjects). Data of 43 subjects (26 women, 17 men) were analysed. The subjects suffered from permanent and severe sleep disturbances and were deeply convinced that environmental radiofrequency electromagnetic fields caused their problems.
Sham-shielding was performed by using a sham shield.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 80 MHz–2.5 GHz
ばく露時間: nine consecutive nights under different shielding conditions

General information

volunteers were divided into three groups: i) true shield ii) sham shield iii) control

ばく露1

主たる特性
周波数 80 MHz–2.5 GHz
タイプ
  • electromagnetic field
ばく露時間 nine consecutive nights under different shielding conditions
ばく露装置
ばく露の発生源／構造
  • mobile phone base station
ばく露装置の詳細 Mobile Faraday cage mounted around all sides of the volunteer's bed, including the bottom. After an adaptation night, polysomnographic measurements were recorded from each volunteer during nine nights under one of the following conditions in random order: real shield, sham shield, and unshielded control.
Additional information Radiofrequency electromagnetic fields were recorded frequency-selectively by a broadband spectral analyser.
パラメータ
測定量 値 種別 Method Mass 備考
電界強度 562.34 µV/m minimum 測定値 - = 55 dBµV
電界強度 31,622.78 µV/m maximum 測定値 - = 90 dBµV

ばく露を受けた生物:

方法 影響評価項目／測定パラメータ／方法

研究対象とした生物試料:
研究対象とした臓器系:
調査の時期:
  • ばく露中
  • ばく露後

研究の主なアウトカム（著者による）

Pooled data analysis did not exhibit statistically significant electromagnetic field-dependent sleep parameters, neither on total radiofrequency electromagnetic field immissions nor on base station signals. Volunteer-specific analysis mostly did not show any significant effect on sleep parameters.

研究の種別:

研究助成

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