Los Angeles study of residential magnetic fields and childhood brain tumors.
Published in: Am J Epidemiol 1996; 143 (2): 105-119
Aim of study (acc. to author)
Endpoint/type of risk estimation
Type of risk estimation:
(odds ratio (OR))
24-h measurement in child's room: > 0.2 µT
24-h measurement in child's room: > 0.25 µT
24-h measurement in child's room: > 0.3 µT
24-h measurement in other room: > 0.2 µT
24-h measurement in other room: > 0.25 µT
24-h measurement in other room: > 0.3 µT
spot measurement at front door: > 0.2 µT
spot measurement at front door: > 0.25 µT
spot measurement at front door: > 0.3 µT
exterior static magnetic fields: 0.332-0.477 µT
exterior static magnetic fields: 0.478-0.489 µT
exterior static magnetic fields: 0.490-0.503 µT
exterior static magnetic fields: 0.504-0.637 µT
interior static magnetic fields: 0.303-0.468 µT
interior static magnetic fields: 0.469-0.480 µT
interior static magnetic fields: 0.481-0.497 µT
interior static magnetic fields: 0.498-0.589 µT
wire code: underground
wire code: very low current and ordinary low configuration (VLCC + OLCC)
wire code: ordinary high current configuration (OHCC)
wire code: very high current configuration (VHCC)
use during pregnancy: electric blanket
use during pregnancy: electric water bed
use during pregnancy: electric clock
use during pregnancy: electric heat radiant
use during pregnancy: microwave
use during pregnancy: ham radio
use by child: electric blanket
use by child: electric water bed
use by child: electric clock
use by child: electric heat radiant
use by child: microwave
use by child: ham radio
use by child: hair dryer
use by child: curling iron
use by child: black/white television
use by child: baby monitor
January 1984 - June 1991
USA (Los Angeles County)
by random digit dialing
case:control = 1:1
Statistical analysis method:
unconditional logistic regression
Conclusion (acc. to author)
Limitations (acc. to author)
The proportion of homes with
magnetic fields of more than 0.3 µT was too low to detect a moderate effect of the magnitude reported in other studies.
Study funded by
California Public Health Foundation, USA
National Institutes of Health (NIH), Maryland, USA
California Department of Health Services, USA
Comments on this article
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