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
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