Residential exposure to electric power transmission lines and risk of lymphoproliferative and myeloproliferative disorders: a case-control study.
Published in: Intern Med J 2007; 37 (9): 614-619
Aim of study (acc. to author)
Endpoint/type of risk estimation
Type of risk estimation:
(odds ratio (OR))
list: complete residential histories
calculation: lifetime residential proximity to
power lines based on address and power grid in Tasmania comprising lines of 88, 110 or 220 kV Exposure groups
closest distance ever lived to a power line: > 300 m
closest distance ever lived to a power line: 51 - 300 m
closest distance ever lived to a power line: 0 - 50 m
distance to power line 0 - 300 m: 0 - 15 years of age
distance to power line 0 - 300 m: 15 years before diagnosis
distance to power line 0 - 300 m: ever versus never
distance to power line 0 - 300 m, residence only in Tasmania: 0 - 15 years of age
distance to power line 0 - 300 m, residence only in Tasmania: 15 years before diagnosis
distance to power line 0 - 300 m, residence only in Tasmania: ever versus never
distance to power line 0 - 300 m: 0 - 5 years of age
distance to power line 0 - 300 m: 6 - 17 years of age
distance to power line 0 - 300 m: ≥ 18 years of age
distance to power line 0 - 300 m, residence only in Tasmania: 0 - 5 years of age
distance to power line 0 - 300 m, residence only in Tasmania: 6 - 17 years of age
distance to power line 0 - 300 m, residence only in Tasmania: ≥ 18 years of age
1972 - 1980
lymphoproliferative and myeloproliferative disorders
histopathology and haematology laboratories in Tasmania, Australia
5-years age group
case:control = 1:1
Statistical analysis method:
conditional logistic regression
Conclusion (acc. to author)
19 patients (2.2 %) and 9 control persons (1.1 %) had ever lived within 50 m to a
power transmission line, 75 patients (8.8 %) and 55 control persons (6.5 %) in the distance of 51 to 300 m. Persons who had ever lived within 50 m to a power transmission line had a non significantly increased risk ( OR 2.06, CI 0.87 - 4.91) for developing lymphoproliferative or myeloproliferative disorders compared to the group who had always lived in the distance of more than 300 m. There was also an increased risk ( OR 1.30, CI 0.88 - 1.91) associated with having lived 51 to 300 m from a power line. Adults who had lived within 300 m from a power line between birth and 15 years of age had a significantly increased risk ( OR 3.23, CI 1.26 - 8.29), persons who had lived within the same distance between birth and 5 years had a higher risk ( OR 4.74, CI 0.98 - 22.9). These association were strenghtended for the matched pairs who had only lived in Tasmania. The authors concluded that the results raise the possibility that prolonged residence close to power transmission lines, especially early in life, may increase the risk of developing lymphoproliferative and myeloproliferative disorders. Limitations (acc. to author)
The number of
subjects available for analysis was small.
Study funded by
Clifford Craig Medical Research Trust (CCMRT), Tasmania, Australia
David Collins Leukaemia Foundation (DCLF), Tasmania, Australia
Royal Hobart Hospital Medical Research Foundation, Tasmania, Australia
University of Plymouth, UK
Comments on this article
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