Childhood cancer and power lines: Results do not support causal role for electromagnetic fields

doi:10.1136/bmj.331.7517.634-a

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Sarah J Hepworth, medical statistician (s.j.hepworth@leeds.ac.uk),
Richard G Feltbower, senior medical statistician,
Roger C Parslow, senior research fellow,
Patricia A McKinney, reader in paediatric epidemiology

Paediatric Epidemiology Group, University of Leeds, Leeds LS2 9LN

Editor—Draper et al present findings on the relation between childhood cancer and the distance of birth residence to high voltage power lines.1 The study's strengths include the large number of case children and unbiased control selection. However, the findings are inconsistent with another UK study, in which neither proximity nor estimates of dose to extremely low frequency magnetic …