MONDAY, June 13 (HealthDay News) -- The mobile phone radio frequency (RF) energy dose absorbed at a tumor location depends on tumor location, phone type, network properties, and conditions of use, and individuals with high mobile phone use may have an increased risk of gliomas in the most exposed areas of the brain, according to two studies published online June 9 in Occupational & Environmental Medicine.
Elisabeth Cardis, Ph.D., from the CIBER Epidemiologia y Salud Pública in Barcelona, Spain, and colleagues estimated the amount of mobile phone RF energy absorbed at the location of a brain tumor. Data were collected from Interphone study participants, network operators, and laboratories involved in specific energy absorption rate measurements. The researchers found that the communication system, frequency band, tumor location in the brain, and the amount and duration of mobile phone use were the main determinants of total cumulative specific RF energy.
In another study, Cardis and colleagues investigated the associations of brain tumors with estimated RF dose from mobile phones in Interphone study participants. The odds ratio of glioma and meningioma patients ever having been regular mobile phone users were 0.93 (95 percent confidence interval [CI], 0.73 to 1.18) and 0.80 (95 percent CI, 0.66 to 0.96), respectively. In an analysis of tumors in the most exposed parts of the brain, those with 10 or more years of mobile phone use had a significantly increased risk of gliomas, and a smaller increase for meningiomas.
"There may be an increase in risk of glioma in the most exposed area of the brain among long-term and heavy users of mobile phones," write the authors of the second study.
Two authors from the first study disclosed financial relationships with the telecom industry, and the second study was indirectly funded by the telecom industry.
Abstract 1
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Abstract 2
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