Letter

Childhood cancer and power lines: What do the data mean?

BMJ 2005; 331 doi: 10.1136/bmj.331.7517.634 (Published 15 September 2005)
Cite this as: BMJ 2005;331:634.1

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  1. Nick Day, professor of epidemiology (nick.day@srl.cam.ac.uk),
  2. Tim Eden, professor of paediatric oncology,
  3. Patricia McKinney, professor of paediatric epidemiology,
  4. Eve Roman, professor of epidemiology,
  5. Jill Simpson, research fellow
  1. Institute of Public Health, Strangeways Research Laboratory, Cambridge CB1 8RN
  2. Academic Unit of Paediatric Oncology, Christie Hospital and Central Manchester and Manchester Children's University Hospitals NHS Trusts, Manchester M20 4BX
  3. Paediatric Epidemiology Group, University of Leeds, Leeds LS2 9LN
  4. Epidemiology and Genetics Unit, Department of Health Sciences, University of York, York YO10 5DD

    Editor—Draper et al used distance of mother's home from high voltage overhead transmission lines (predominantly 275 kV and 400 kV) at the time of her child's birth as a proxy for her child's subsequent exposure to power-frequency magnetic fields (reviewed by Ahlbom et al).1 2 As they acknowledge, this is a crude estimate since, in contrast to other reports,2 no household measurements were taken, no data on more prevalent …

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