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Cellular phone use and brain tumor: a meta-analysis.


Posted on: 07/17/2007

J Neurooncol. 2007 Jul 10; [Epub ahead of print] Related Articles, Links

 
Cellular phone use and brain tumor: a meta-analysis.

Kan P, Simonsen SE, Lyon JL, Kestle JR.

Division of Pediatric Neurosurgery, Department of Neurosurgery, University of Utah, 100 N. Medical Drive, Salt Lake City, UT, 84113-1100, USA, john.kestle@hsc.utah.edu.

BACKGROUND: The dramatic increase in the use of cellular phones has generated concerns about potential adverse effects, especially the development of brain tumors. We conducted a meta-analysis to examine the effect of cellular phone use on the risk of brain tumor development. METHODS: We searched the literature using MEDLINE to locate case-control studies on cellular phone use and brain tumors. Odds ratios (ORs) for overall effect and stratified ORs associated with specific brain tumors, long-term use, and analog/digital phones were calculated for each study using its original data. A pooled estimator of each OR was then calculated using a random-effects model. RESULTS: Nine case-control studies containing 5,259 cases of primary brain tumors and 12,074 controls were included. All studies reported ORs according to brain tumor subtypes, and five provided ORs on patients with >/=10 years of follow up. Pooled analysis showed an overall OR of 0.90 (95% confidence interval [CI] 0.81-0.99) for cellular phone use and brain tumor development. The pooled OR for long-term users of >/=10 years (5 studies) was 1.25 (95% CI 1.01-1.54). No increased risk was observed in analog or digital cellular phone users. CONCLUSIONS: We found no overall increased risk of brain tumors among cellular phone users. The potential elevated risk of brain tumors after long-term cellular phone use awaits confirmation by future studies.

PMID: 17619826 [PubMed - as supplied by publisher]

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