Study type: Epidemiological study (observational study)

Reanalysis of risks of childhood leukaemia with distance from overhead power lines in the UK. epidem.

Published in: J Radiol Prot 2018; 38 (3): N30-N35

Aim of study (acc. to author)

The previous study of childhood leukemia and distance to high-voltage overhead power lines in the UK by Bunch et al. (2014) has been re-analyzed by using finer distance categories.

Endpoint/type of risk estimation

Type of risk estimation: (odds ratio (OR))

Exposure

Assessment

Exposure groups

Group Description
Group 1 distance of address at birth to nearest power line: 0 - 50 m
Group 2 distance of address at birth to nearest power line: 50 - 100 m
Group 3 distance of address at birth to nearest power line: 100 - 150 m
Group 4 distance of address at birth to nearest power line: 150 - 200 m
Group 5 distance of address at birth to nearest power line: 200 - 250 m
Group 6 distance of address at birth to nearest power line: 250 - 300 m
Group 7 distance of address at birth to nearest power line: 300 - 350 m
Group 8 distance of address at birth to nearest power line: 350 - 400 m
Group 9 distance of address at birth to nearest power line: 400 - 450 m
Group 10 distance of address at birth to nearest power line: 450 - 500 m
Group 11 distance of address at birth to nearest power line: 500 - 550 m
Group 12 distance of address at birth to nearest power line: 550 - 600 m
Reference group 13 distance of address at birth to nearest power line: > 600 m

Population

Case group

Control group

Statistical analysis method:

Conclusion (acc. to author)

In the 1960s and 1970s, when an elevated risk for childhood leukemia was principally found, the risk did not fall monotonically with distance between residence and power line but had a maximum at 100–200 m (group 3 (100-150 m): OR 6.00, CI 0.72-49.84; group 4 (150-200 m): OR 10.00, CI 1.28-78.12).
The authors conclude that this weakens the evidence that any elevated risks are related to magnetic fields, and slightly strengthens the evidence for a possible effect involving residential mobility or other socioeconomic factors.

Study funded by

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