Study type: Medical/biological study (experimental study)

No effect of mobile phone-like RF exposure on patients with atopic dermatitis. med./bio.

Published in: Bioelectromagnetics 2008; 29 (5): 353-362

Aim of study (acc. to author)

This study investigated the effect of exposure to a mobile phone like radiofrequency electromagnetic field on people with atopic dermatitis.

Background/further details

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.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 890 MHz
Modulation type: pulsed
Exposure duration: continuous for 30 min
  • SAR: 1 W/kg average over mass (1 g)

General information

The experiments were performed for approx. 6 months with a 3-month break during the pollen season.

Exposure 1

Main characteristics
Frequency 890 MHz
Type
Exposure duration continuous for 30 min
Modulation
Modulation type pulsed
Pulse width 0.577 ms
Repetition frequency 217 Hz
Additional info

The DTX function was turned off.

Exposure setup
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.
Parameters
Measurand Value Type Method Mass Remarks
SAR 1 W/kg average over mass measured 1 g -

Reference articles

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

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.

Study character:

Study funded by

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