この研究は、10代の若者に対するCDMA電話の生理学的影響を調べる目的で実施された誘発実験である。実験参加者は、10代の若者21人と成人21人である。彼らを男女別にグループ化すると男性群23人、女性群19人であった。各参加者は、CDMA携帯電話から放出される300 mWの無線周波（RF）電磁界への30分間ばく露を受け、その間に、収縮期血圧および拡張期血圧、心拍数、呼吸数、皮膚抵抗などの生理学的パラメータを同時に測定した。その結果、10代の若者群における皮膚抵抗の低下を除き、両群において、すべてのパラメータはばく露の影響を受けなかった（P <.0001）；男性群23人、女性群19人でデータを再分析すると、男性群における皮膚抵抗の低下を除き、両群において、すべてのパラメータはばく露の影響を受けなかった（P = .0026）；ばく露終了後10分で、皮膚抵抗は、年齢や性別に関係なく安静時のレベルに回復した、と報告している。
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To study the effects of CDMA mobile phones on different physiological parameters in teenagers and adults.
Two groups consisting of 21 teenagers (15.9 +/- 2.3 years) and 21 adults (30.9 +/- 5.6 years) were exposed. Additionally, 42 subjects were regrouped to 23 male and 19 female subjects in order to see any discrepancy in the physiological parameters between the sexes.
| 周波数 | 835 MHz |
|---|---|
| タイプ |
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| ばく露時間 | continuous for 30 min |
| Modulation type | CW |
|---|---|
| Additional information |
continuous clipped sine waves |
| ばく露の発生源／構造 |
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|---|---|
| チャンバの詳細 | Subjects rested on the experimental bed in a supine position. |
| ばく露装置の詳細 | A headphone was modified to install a folder-type cellular phone on the left side of the head. The lower part of the cellular phone with buttons was wrapped up with 5 mm thick insulating material in order to prevent the subjects from feeling the generated heat. |
| Sham exposure | A sham exposure was conducted. |
| Additional information | Real and sham exposures were performed in a double blind test. However, the exposure sequence was not randomized, sham exposures were performed first in order to avoid interference with previous real exposures. Between sham and real exposures, the subject took a 30 min break. |
In the teenager group, the physiological parameters did not reveal any significant changes regardless of real or sham exposure and exposure duration, but the skin resistance decreased significantly under real exposures. This decrease indicates that radiofrequency electromagnetic fields might stimulate teenager's autonomic nervous system, resulting in sweat secretion. Ten minutes after the exposure termination, the skin resistance returned to the initial resting value.
In contrast, there were no significant changes in the physiological parameters in the adult group, regardless of the real or sham exposure and exposure duration.
For the regrouped 23 male and 19 female subjects, all the parameters were unaffected during the exposure except for decreased skin resistance of the male subjects.
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