Of cellphones and brain tumors

Questions About Cellphones and Brain Tumors
By TARA PARKER-POPE

A long-awaited study of cellphone use and brain health has finally been released, but the data are raising more questions than answers.

The report is called Interphone, a 13-country study that amounts to the largest and longest study of whether extensive cellphone use increases risk for brain tumors. The study results, published in The International Journal of Epidemiology, were delayed by four years, reportedly after researchers disagreed over how to present the results.

The final paper states that overall there is no link between cellphone use and brain tumors. However, the investigators report that study participants with the highest level of cellphone use had a 40 percent higher risk for a type of brain tumor called a glioma. That risk, though, is discounted because of potential “biases and errors” that “prevent a causal interpretation,” the investigators wrote.

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