Study type: Epidemiological study (observational study)

50-Hz electromagnetic environment and the incidence of childhood tumors in Stockholm County. epidem.

Published in: Bioelectromagnetics 1986; 7 (2): 191-207

Aim of study (acc. to author)

A case-control study was performed in Sweden to investigate the possible association between childhood tumors and magnetic fields from overhead power lines and other electromagnetic sources.

Further details

Exposure was assessed by measurement of the magnetic fields at the dwellings where the child lived at the time of birth and diagnosis. The occurences of visible electrical configurations was noted for each dwelling within 150 m.

Endpoint/type of risk estimation

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

Exposure

Assessment

Exposure groups

Group Description
Reference group 1 magnetic field: < 0.3 µT; 200-kV wires > 150 m away from dwelling
Group 2 magnetic field: ≥ 0.3 µT; 200-kV wires > 150 m away from dwelling
Group 3 magnetic field: < 0.3 µT; 200-kV wires ≤ 150 m away from dwelling
Group 4 magnetic field: ≥ 0.3 µT; 200-kV wires ≤ 150 m away from dwelling

Population

Case group

Control group

Study size

Cases Controls
Eligible 891 -
Participants 716 716
Statistical analysis method:

Conclusion (acc. to author)

Visible 200-kV wires were observed at 45 of 2,098 dwellings, and were found twice as frequently among cases as among controls. Magnetic fields of 0.3 µT and more were measured at 48 dwellings, and were also found twice as frequently among cases as among controls.

Study funded by

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