Los Angeles study of residential magnetic fields and childhood brain tumors.
Preston-Martin-S; Navidi-W; Thomas-D; Lee-P-J; Bowman-J; Pogoda-J
Am J Epidemiol 1996 Jan; 143(2):105-119
Reported here were the findings of a Wertheimer-Leeper wire coding and magnetic field measurement study which was added to a large retrospective case control interview study concerned with the incidence of primary brain tumors among children residing in Los Angeles County, California. The study included 298 children under 20 years of age with a primary brain tumor diagnosed from 1984 to 1991 and 298 referent children. Interview information was available concerning maternal and childhood use of appliances. Results were presented for the 2,000 residences where cases and controls lived from conception to age at diagnosis of the case. The authors conclude that in Los Angeles County, where ambient fields in homes are relatively low compared to other areas of the country, overhead power lines appear not to be related to risk. However, in those relatively few homes where the exposure is exceptionally high (over 3 milligauss) there may be a risk factor involved from the overhead lines. There appeared to be an increase in risk among children living at the time of diagnosis in homes having underground wiring, but the authors suggest this is an artifact introduced by using current controls for historical cases. This apparent increased risk disappeared when the analysis was restricted to the later years of study. There did not appear to be any association with the use of several potential sources of exposure such as various electrical appliances.
Epidemiology; Risk-factors; Risk-analysis; Electrical-fields; Magnetic-fields; Electromagnetic-fields; Brain-tumors; Cancer-rates; Brain-damage; Children; Models; Mathematical-models; Statistical-analysis; Children; Electric-power-generation; Electrical-properties; Electromagnetic-energy; Electromagnetic-radiation; Electromagnetic-wave-transmission;
Author Keywords: Brain neoplasms; Case-control studies; Child; Electromagnetic field
Dr. Susan Preston-Martin, University of Southern California, Department of Preventive Medicine, 1420 San Pablo Street, PMB B301, Los Angeles, CA 90033-9987
American Journal of Epidemiology