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PLOS ONE | www.plosone.org 1 March 2013 | Volume 8 | Issue 3 |
Mobile Phone Use, Blood Lead Levels, and Attention Deficit Hyperactivity Symptoms in Children: A Longitudinal Study
Miércoles 3 de abril de 2013 · 670 lecturas
Mobile Phone Use, Blood Lead Levels, and Attention Deficit Hyperactivity Symptoms in Children: A Longitudinal Study
Abstract
Background: Concerns have developed for the possible negative health effects of radiofrequency electromagnetic field (RFEMF)
exposure to children’s brains. The purpose of this longitudinal study was to investigate the association between
mobile phone use and symptoms of Attention Deficit Hyperactivity Disorder (ADHD) considering the modifying effect of
lead exposure.
Methods: A total of 2,422 children at 27 elementary schools in 10 Korean cities were examined and followed up 2 years
later. Parents or guardians were administered a questionnaire including the Korean version of the ADHD rating scale and
questions about mobile phone use, as well as socio-demographic factors. The ADHD symptom risk for mobile phone use
was estimated at two time points using logistic regression and combined over 2 years using the generalized estimating
equation model with repeatedly measured variables of mobile phone use, blood lead, and ADHD symptoms, adjusted for
covariates.
Results: The ADHD symptom risk associated with mobile phone use for voice calls but the association was limited to
children exposed to relatively high lead.
Conclusions: The results suggest that simultaneous exposure to lead and RF from mobile phone use was associated with
increased ADHD symptom risk, although possible reverse causality could not be ruled out.
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