Duitsland: Telecomzendmasten met sterke invloed op de slaapkwaliteit....maar niet door de EMV

woensdag, 02 februari 2011 - Categorie: Onderzoeken

Zendmasten voor mobiele telefonie blijven psychiaters en psychotherapeuten veel werk bezorgen. Nu een dubbelblinde Duitse studie waaruit zou blijken dat de zendmasten een significant negatieve invloed op de slaapkwaliteit hebben....... maar alleen bij mensen die zich er zorgen over maken en zou niet gerelateerd zijn aan de elektromagnetische velden. Over toekomstige funding hoeven de onderzoekers zich geen zorgen meer te maken:

American Journal of Human Biology 2010 Sep-Oct; 22(5):613-8.

Do mobile phone base stations affect sleep of residents? Results from an experimental double-blind sham-controlled field study.

Danker-Hopfe H, Dorn H, Bornkessel C, Sauter C.

Department of Psychiatry and Psychotherapy, Sleep Medicine Competence Center, Charit University Medicine Berlin, Campus Benjamin Franklin, Berlin, Germany. heidi.danker-hopfe@charite.de

Abstract
OBJECTIVES: The aim of the present double-blind, sham-controlled, balanced randomized cross-over study was to disentangle effects of electromagnetic fields (EMF) and non-EMF effects of mobile phone base stations on objective and subjective sleep quality.

METHODS: In total 397 residents aged 18-81 years (50.9% female) from 10 German sites, where no mobile phone service was available, were exposed to sham and GSM (Global System for Mobile Communications, 900 MHz and 1,800 MHz) base station signals by an experimental base station while their sleep was monitored at their homes during 12 nights. Participants were randomly exposed to real (GSM) or sham exposure for five nights each. Individual measurement of EMF exposure, questionnaires on sleep disorders, overall sleep quality, attitude towards mobile communication, and on subjective sleep quality (morning and evening protocols) as well as objective sleep data (frontal EEG and EOG recordings) were gathered.

RESULTS: Analysis of the subjective and objective sleep data did not reveal any significant differences between the real and sham condition. During sham exposure nights, objective and subjective sleep efficiency, wake after sleep onset, and subjective sleep latency were significantly worse in participants with concerns about possible health risks resulting from base stations than in participants who were not concerned.

CONCLUSIONS: The study did not provide any evidence for short-term physiological effects of EMF emitted by mobile phone base stations on objective and subjective sleep quality. However, the results indicate that mobile phone base stations as such (not the electromagnetic fields) may have a significant negative impact on sleep quality.

Voor het originele abstract zie:
www.ncbi.nlm.nih.gov/pubmed/20737608?dopt=Abstract .


Exposure details:

Do mobile phone base stations affect sleep of residents? Results from an experimental double-blind sham-controlled field study.

Exposure 1:
Main characteristics
frequency: 900 - 1800 MHz
type of field: electromagnetic field

Exposure setup
exposure source/structure: simulated GSM base station
exposure time pattern: 5 nights

setup details: two GSM 900 and two GSM 1800 channels were used for each sector; channels set to maximum transmit power in all eight time slots; additional generic GSM signals using six of the eight available time slots were transmitted to all sectors for both GSM 900 and GSM 1,800 to increase amplitude modulation

sham: sham exposure was performed
add. information: distance of the experimental base station to the houses: up to 500 m

Study funded by

Bundesamt fr Strahlenschutz (BfS; Federal Office for Radiation Protection), Salzgitter, Germany
Deutsches Mobilfunk Forschungsprogramm (DMF; German Mobile Phone Research Programme) at Federal Office for Radiation Protection (BfS)


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