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A case-control study was conducted in Iran to investigate the role of prenatal and postnatal exposure to high voltage power lines and other risk factors on the incidence of childhood acute lymphoblastic leukemia.
Remark EMF-Portal: Number of cases and controls as well as study results and whole chapters of this publication are identical in the publication by Tabrizi and Bidgoli 2015. It is unclear whether this is a replication study with the same results or two studies conducted in two different cities with the same results.
Details of exposure assessment are missing in this publication. It is not stated how 'living near high voltage power lines' is defined and how the exposure to power lines was classified into 'yes' or 'no'.
|prenatal exposure to power lines: no
|prenatal exposure to power lines: yes
|postnatal exposure to power lines: no
|postnatal exposure to power lines: yes
Overall, 4 out of 22 (18.8%) of children with acute lymphoblastic leukemia and 3 out of 100 control children were exposed to high voltage power lines. As the population study was from low socioeconomic status, use of mobile phones, computers and microwave ovens was negligible.
Prenatal and childhood exposure to high voltage power lines was considered as the most important environmental risk factors of acute lymphoblastic leukemia (OR 3.65, CI 1.69-7.88).
The authors concluded that prenatal and postnatal exposure to high voltage power lines and living in pollutant regions as well as familial history of leukemia and parental occupational exposure to chemicals and radiation could be described as risk factors of childhood acute lymphoblastic leukemia for the first time in a low socioeconomic status Iranian population.
The results are based on low numbers.