Study type: Epidemiological study (observational study)

Distance from residence to power line and risk of childhood leukemia: a population-based case-control study in Denmark. epidem.

Published in: Cancer Causes Control 2014; 25 (2): 171-177

Aim of study (acc. to author)

A case-control study was conducted in Denmark to investigate the association between the distance from residence at birth to the nearest power line and the risk of childhood leukemia.

Endpoint/type of risk estimation

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

Exposure

Assessment

Exposure groups

Group Description
Group 1 distance from address at birth to the nearest 132-400 kV power line: 0 - 199 m
Group 2 distance from address at birth to the nearest 132-400 kV power line: 200 - 599 m
Group 3 distance from address at birth to the nearest 132-400 kV power line: ≥ 600 m

Population

Case group

Control group

Study size

Cases Controls
Eligible 1,698 3,396
Statistical analysis method: (adjustment: )

Conclusion (acc. to author)

Most of the addresses at birth (94.9 %) were located 600 m or more from the nearest 132-400 kV overhead power line. Of the 4,282 addresses at birth, for which both distance to the nearest power line had been calculated and the magnetic field strength estimated 12 addresses were exposed to ≥ 0.1 µT .
No higher risk of leukemia was found for children living 0-199 m (OR 0.76, CI 0.40-1.45) or for children living 200-599 m (OR 0.90, CI 0.66-1.22) compared to children who lived ≥ 600 m away from a 132-400 kV overhead power line. When restricting the analysis to 220 and 400 kV overhead power lines, slightly elevated risk was observed for children who lived 200-599 m from a power line was 1.76 (CI 0.82-3.77) compared to children who lived ≥ 600 m away. However, chance is a likely explanation for this finding as the result was not significant, numbers were small, and there were no indications of a higher risk closer to the lines since no cases were observed within 200 m of these.

Study funded by

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