In this study, further analyses on the database of a Swedish case-control study (see publication 9105) were performed on the use of cellular telephones and cordless telephones and the risk of brain tumors.
Furthermore, there are additional analyses of the database of the same case-control study (publication 9105) in publications 9520, 11953 and 12393.
Subjects who started their use of a mobile phone or cordless phone within one year prior diagnosis were classified as unexposed.
|Reference group 1||unexposed|
|Group 2||analog, 450 MHz, ever, ipsilateral|
|Group 3||analog, 450 MHz, ever, contralateral|
|Group 4||analog, 450 MHz, ever, varying ipsi/contralateral|
|Group 5||analog, 450 MHz, ever, all|
|Group 6||analog, 900 MHz, ever, ipsilateral|
|Group 7||analog, 900 MHz, ever, contralateral|
|Group 8||analog, 900 MHz, ever, varying ipsi/contralateral|
|Group 9||analog, 900 MHz, ever, all|
|Group 10||analog, 450 + 900 MHz, ever, ipsilateral|
|Group 11||analog, 450 + 900 MHz, ever, contralateral|
|Group 12||analog, 450 + 900 MHz, ever, varying ipsi/contralateral|
|Group 13||analog, 450 + 900 MHz, ever, all|
|Group 14||digital, total, ipsilateral|
|Group 15||digital, total, contralateral|
|Group 16||digital, total, varying ipsi/contralateral|
|Group 17||digital, total, all|
|Group 18||cordless, total, ipsilateral|
|Group 19||cordless, total, contralateral|
|Group 20||cordless, total, varying ipsi/contralateral|
|Group 21||cordless, total, all|
|Participation rate||91 %||90 %|
18.7 % of the cases and 18.2 % of the controls reported the use of analog cellular phones, 34.7 % of the cases and 33.0 % of the controls the use of digital cellular phones, and 30.4 % of the cases and 26.5 % of the controls the use of cordless phones.
Overall, no significantly increased risk for malignant brain tumors and the use of cellular phones and cordless phones was observed. For the ipsilateral use of analog cellular telephones, significantly increased risks for all malignant brain tumors as well for astrocytoma were found.