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Occup Environ Med. 2008 May;65(5):342-6. Epub 2007 Oct 10.

A meta-analysis for neurobehavioural effects due to electromagnetic field exposure emitted by GSM mobile phones.

Author information

1
Institute of Management Science, Division Ergonomics and Organization, Vienna University of Technology, Theresianumgasse 27, A-1040 Vienna, Austria. barth@imw.tuwien.ac.at

Abstract

BACKGROUND AND OBJECTIVE:

Numerous studies have investigated the potential effects of electromagnetic fields (EMFs) emitted by GSM mobile phones ( approximately 900 MHz to approximately 1800 MHz) on cognitive functioning, but results have been equivocal. In order to try and clarify this issue, the current study carried out a meta-analysis on 19 experimental studies.

DESIGN:

Meta-analysis.

METHODS:

Nineteen studies were taken into consideration. Ten of them were included in the meta-analysis as they fulfilled several minimum requirements; for example, single-blind or double-blind experimental study design and documentation of means and standard deviation of the dependent variables. The meta-analysis compared exposed with non-exposed subjects assuming that there is a common population effect so that one single effect size could be calculated. When homogeneity for single effect sizes was not given, an own population effect for each study and a distribution of population effects was assumed.

RESULTS:

Attention measured by the subtraction task seems to be affected in regard to decreased reaction time. Working memory measured by the N-back test seems to be affected too: under condition 0-back target response time is lower under exposure, while under condition 2-back target response time increases. The number of errors under condition 2-back non-targets appears to be higher under exposure.

CONCLUSION:

Results of the meta-analysis suggest that EMFs may have a small impact on human attention and working memory.

PMID:
17928386
DOI:
10.1136/oem.2006.031450
[Indexed for MEDLINE]

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