Study type: Epidemiological study (observational study)

Extra low frequency electric and magnetic fields in the bedplace of children diagnosed with leukaemia: a case-control study epidem.

By: Coghill RW, Steward J, Philips A
Published in: Eur J Cancer Prev 1996; 5 (3): 153-158
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Aim of study (acc. to author)

The possible association between childhood leukemia and exposure to extremely low frequency electric and magnetic fields was investigated in a case-control-study in UK.

Endpoint/type of risk estimation

Type of risk estimation: (relative risk (RR))

Exposure

Assessment

Exposure groups

Group Description
Reference group 1 electric field: < 5 V/m
Group 2 electric field: 5 - 9 V/m
Group 3 electric field: 10 - 19 V/m
Group 4 electric field: 20 V/m

Population

Case group

Control group

Study size

Cases Controls
Participants 56 56
Statistical analysis method:

Results (acc. to author)

No statistically significant differences of the magnetic field cases between controls and cases were observed. An increased relative risk for childhood leukemia was found for electric field exposure above 20 V/m. A dose-response relationship was observed between electric field exposure and incidence.

Limitations (acc. to author)

It was not possible to obtain all relevant cases from one geographical region for a specified time period via health authorities. The period of time between diagnosis and measurement was several years in some cases.

Study funded by

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