This study investigated the effect of exposure to a mobile phone like radiofrequency electromagnetic field on people with atopic dermatitis.
Fifteen subjects (7 female, 8 male; mean age 31 years) with atopic dermatitis were recruited and matched with 15 controls without atopic dermatitis. Each subject was both sham exposed and electromagnetic field exposed.
Atopic dermatitis is a disease of the skin, characterized by strong pruritus and dry skin, often associated with other diseases like allergic rhinitis, asthma, food allergy.
The experiments were performed for approx. 6 months with a 3-month break during the pollen season.
| Frequency | 890 MHz |
|---|---|
| Type | |
| Exposure duration | continuous for 30 min |
| Exposure source |
|
|---|---|
| Distance between exposed object and exposure source | 8.5 cm |
| Chamber | The experiments were performed in an exposure chamber with negligible background levels of both power frequency and RF fields. The subjects were seated in a semi-reclining chair in front of an LCD computer screen on which a film was shown. |
| Setup | Two antennas mounted on an adjustable wooden framework were placed at a distance of 8.5 cm, one on each side of the subject's head positioned between two wooden bars. The RF signal was directed via a power divider to a power meter and via a remotely controlled selector to the (left or) right antenna or a dummy load. RF exposure was applied from the right side only. |
| Sham exposure | A sham exposure was conducted. |
| Additional info | Each subject attended two sessions, a week apart, with real or sham exposure in random order. The exposure condition was not known by the experimenter or the subjects. However, the physiological recordings were distorted by the RF signal, so it was not possible to keep the study completely double blind. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| SAR | 1 W/kg | average over mass | measured | 1 g | - |
No statistically significant effects of the radiofrequency exposure were found in any of the measured serum substances. Concerning mobile phone related symptoms a statistical evaluation could not be realized.
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