Study type: Medical/biological study (observational study)

How does long term exposure to base stations and mobile phones affect human hormone profiles? med./bio.

Published in: Clin Biochem 2011; 45: 157-161

Aim of study (acc. to author)

To study the effects of radiofrequency irradiation emitted from mobile phones and base stations on human hormone profiles.

Background/further details

This study was conducted for six years (blood samples were collected after one, three and six years). 82 mobile phone users (age ranges of 14-22 years (n=41) and 25-60 years (n=41)) were divided into three groups according to their exposure duration: 1) weak exposure (n=19), 2) moderate exposure (n=9), and 3) strong exposure (n=13). In addition, 20 subjects served as negative control.
On the other hand, volunteers exposed to radiofrequency irradiation emitted from base stations (n=34) were selected (age ranges of 14-22 years (n=17) and 25-60 years (n=17)) and living at distances of 20-100 m or 100-500 m apart from the base station. Additionally, 10 subjects of each age range living at a distance of more than 500 m apart from the base station served as negative control group.
Remark EMF-Portal: Confounders were not considered. It is not clear whether exposure data were collected once or regularly during the six years (i.e. whether the exposure was unchanged during the six years). Not clear, how many males and females have been in the groups.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 950 MHz
Exposure duration: continuous for up to six years (see add. information)
-
Exposure 2: 950 MHz
Exposure duration: continuous for up to six years (see add. information)
-

Exposure 1

Main characteristics
Frequency 950 MHz
Type
Exposure duration continuous for up to six years (see add. information)
Additional info exposure to mobile phones
Exposure setup
Exposure source
Additional info users were divided into the following three groups: i) weak use: less than 10 min/day ii) medium use: 30 - 60 min/day iii) strong use: more than 60 min/day
Parameters

No parameters are specified for this exposure.

Exposure 2

Main characteristics
Frequency 950 MHz
Type
Exposure duration continuous for up to six years (see add. information)
Additional info exposure to mobile phone base stations
Exposure setup
Exposure source
Additional info users were divided into the following three groups: i) living at a distance of 20 - 100 m from a base station ii) living at a distance of 100 - 500 m from a base station i) living at a distance of more than 500 m from a base station (negative control)
Parameters

No parameters are specified for this exposure.

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

The data showed significant decreases in ACTH, cortisol, thyroid hormones, prolactin (for young females), and testosterone levels of exposed groups compared with the control groups.

Study character:

Study funded by

Related articles