Power-frequency magnetic fields and childhood brain tumors: a case-control study in Japan.
Published in: J Epidemiol 2010; 20 (1): 54-61
Aim of study (acc. to author)
Endpoint/type of risk estimation
Type of risk estimation:
(odds ratio (OR))
questionnaire: mother's and child's use of electric appliances measurement: 1-week-long continuous measurement at 30-sec intervals in the
child's bedroom and 5-min-long spot measurement at several points inside and outside the house calculation: distance from residence to nearest
high voltage power line based on maps provided by the power companies and geographical information system sofware Exposure groups
Reference group 1
bedroom magnetic field level: below 0.1 µT
bedroom magnetic field level: 0.1-0.2 µT
bedroom magnetic field level: 0.2-0.4 µT
bedroom magnetic field level: above 0.4 µT
May 1999 - September 2002
Japan (Tokyo, Nagoya, Kyoto, Osaka and Kitakyushu metropolitan areas)
population size of the municipality D: Größ
Statistical analysis method:
conditional logistic regression
Conclusion (acc. to author)
Limitations (acc. to author)
The findings are based on low numbers.
Study funded by
Ministry of Education, Culture, Sports, Science and Technology, Japan
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