Abstracts: ISEE 21st Annual Conference, Dublin, Ireland, August 25-29, 2009: Poster Presentation Abstracts
Background and Objective:
The association between extremely low-frequency electromagnetic fields and increased risk of childhood leukemia has been studied, although the findings were not consistent in establishing a relationship between cause and effect. The aim of this study was to investigate the relationship between reported cases of leukemia at the age from 0 to 19 years old and residence proximity to power lines in the city of Sao Paulo, between the years of 1997 and 2004.
For this purpose, the leukemia childhood cases registered in the Cancer Register Population Base of Sao Paulo City (RCBP-SP) were geocoded by residence address. Utilizing the 2000 Brazilian census demographic bases and the electric power lines geographical layers, it was possible to calculate leukemia incidence according to the distance to electric power lines. Geographical Information Systems (GIS–Maptitude 4.6) resources were used.
The results demonstrated that childhood leukemia cases, registered in the RCBP-SP from 1997 to 2004 in Sao Paulo City, have geographical homogeneous distribution. However, the highest incidence value occurred inside 200 m. of distance from the electric power lines (22.46/100,000 inhab.), when compared with 400 m. (14.97/100,000 inhab.), 600 m. (16.08/100,000 inhab.), 800 m. (21.17/100,000 inhab.) and 1000 m. (20.07/100,000 inhab.), and also when compared to the media of the city (19.34/100,000 inhab.).
Although the present study is a descriptive analysis, the results suggest a relationship between the residence proximity to power lines and the incidence of childhood leukemia.