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

[睡眠ポリグラフに基づく睡眠の質に対する携帯電話ばく露(GSM 900およびWCDMA / UMTS)の影響:個人内および個人間での見方] med./bio.

Effects of mobile phone exposure (GSM 900 and WCDMA/UMTS) on polysomnography based sleep quality: An intra- and inter-individual perspective.

掲載誌: Environ Res 2016; 145: 50-60

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研究目的(著者による)

The effects of nocturnal exposure of subjects to a GSM (900 MHz) or a WCDMA/UMTS (2 GHz) electromagnetic field on the sleep structure should be investigated.

詳細情報

30 healthy young men (18-30 years) participated in the study. Each subject was studied for a total of 10 nights, which were scheduled at an interval of approximately one night every two weeks. The first night served for adaptation and screening purposes, the remaining 9 nights were recorded. During these 9 nights, subjects were either exposed to GSM, WCDMA/UMTS or sham exposure for three nights each, following a randomized design.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 900 MHz
Modulation type: pulsed
ばく露時間: continuous during the whole night (recording for 8 h) for a total of 3 nights
GSM
  • SAR: 2 W/kg maximum (10 g)
ばく露2: 1,966 MHz
ばく露時間: continuous during the whole night (recording for 8 h) for a total of 3 nights
WCDMA/UMTS
  • SAR: 2 W/kg maximum (10 g)

ばく露1

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous during the whole night (recording for 8 h) for a total of 3 nights
Additional information GSM
Modulation
Modulation type pulsed
Duty cycle 12.5 %
Repetition frequency 217 Hz
ばく露装置
ばく露の発生源/構造
  • head-worn antenna
チャンバの詳細 shielded room
ばく露装置の詳細 a head-worn antenna with textile cushion fed by a thin RF coaxial cable was used and attached to the right side of the head during sleep; only RF immune devices were used in the exposure room, other equipment like clocks, portable players and phones were not allowed
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
SAR 2 W/kg maximum 測定値および計算値 10 g -

ばく露2

主たる特性
周波数 1,966 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous during the whole night (recording for 8 h) for a total of 3 nights
Additional information WCDMA/UMTS
Modulation
Modulation type cf. additional information
Additional information

1966 MHz carrier frequency with Quadrature Phase Shift Keying (QPSK) modulation and a power control emulation sequence repeated every minute; the sequence comprised 45 s of toggling between 50% and 100% maximum output power for 0.67 ms each and 15 s of simulated fading over a dynamic range of 30 dB

ばく露装置
ばく露の発生源/構造
  • E1と同じ装置
パラメータ
測定量 種別 Method Mass 備考
SAR 2 W/kg maximum 測定値および計算値 10 g -

Reference articles

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

研究の主なアウトカム(著者による)

In 90% of the subjects, one or more sleep parameters were significantly different during exposure to GSM or WCDMA/UMTS fields compared to the sham exposure condition. However, effects showed no consistence between individuals except for an increased REM sleep duration (9 subjects during GSM exposure, 10 subjects during WCDMA/UMTS exposure).
The authors conclude that exposure of subjects to a GSM (900 MHz) or a WCDMA/UMTS (2 GHz) electromagnetic field might induce individual changes in the sleep structure and a general prolongation of the REM sleep phase. These changes do not necessarily indicate a disturbance of sleep.

研究の種別:

研究助成

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