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- Title
A pooled analysis of extremely low-frequency magnetic fields and childhood brain tumors.
- Authors
Kheifets, Leeka; Ahlbom, A; Crespi, C M; Feychting, M; Johansen, C; Monroe, J; Murphy, M F G; Oksuzyan, S; Preston-Martin, S; Roman, E; Saito, T; Savitz, D; Schüz, J; Simpson, J; Swanson, J; Tynes, T; Verkasalo, P; Mezei, G
- Abstract
Pooled analyses may provide etiologic insight about associations between exposure and disease. In contrast to childhood leukemia, no pooled analyses of childhood brain tumors and exposure to extremely low-frequency magnetic fields (ELF-MFs) have been conducted. The authors carried out a pooled analysis based on primary data (1960-2001) from 10 studies of ELF-MF exposure and childhood brain tumors to assess whether the combined results, adjusted for potential confounding, indicated an association. The odds ratios for childhood brain tumors in ELF-MF exposure categories of 0.1-<0.2 μT, 0.2-<0.4 μT, and ≥0.4 μT were 0.95 (95% confidence interval: 0.65, 1.41), 0.70 (95% CI: 0.40, 1.22), and 1.14 (95% CI: 0.61, 2.13), respectively, in comparison with exposure of <0.1 μT. Other analyses employing alternate cutpoints, further adjustment for confounders, exclusion of particular studies, stratification by type of measurement or type of residence, and a nonparametric estimate of the exposure-response relation did not reveal consistent evidence of increased childhood brain tumor risk associated with ELF-MF exposure. These results provide little evidence for an association between ELF-MF exposure and childhood brain tumors.
- Publication
American journal of epidemiology, 2010, Vol 172, Issue 7, p752
- ISSN
1476-6256
- Publication type
Journal Article
- DOI
10.1093/aje/kwq181