Home pesticide exposures and risk of childhood leukemia: Findings from the childhood leukemia international consortium
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This is the peer reviewed version of the following article: Bailey, H. and Infante-Rivard, C. and Metayer, C. and Clavel, J. and Lightfoot, T. and Kaatsch, P. and Roman, E. et al. 2015. Home pesticide exposures and risk of childhood leukemia: Findings from the childhood leukemia international consortium. International Journal of Cancer. 137 (11): pp. 2644-2663., which has been published in final form at http://doi.org/10.1002/ijc.29631. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving at http://olabout.wiley.com/WileyCDA/Section/id-820227.html#terms
© 2015 UICC. Some previous studies have suggested that home pesticide exposure before birth and during a child's early years may increase the risk of childhood leukemia. To further investigate this, we pooled individual level data from 12 case-control studies in the Childhood Leukemia International Consortium. Exposure data were harmonized into compatible formats. Pooled analyses were undertaken using multivariable unconditional logistic regression. The odds ratio (ORs) for acute lymphoblastic leukemia (ALL) associated with any pesticide exposure shortly before conception, during pregnancy and after birth were 1.39 (95% confidence interval [CI]: 1.25, 1.55) (using 2,785 cases and 3,635 controls), 1.43 (95% CI: 1.32, 1.54) (5,055 cases and 7,370 controls) and 1.36 (95% CI: 1.23, 1.51) (4,162 cases and 5,179 controls), respectively. Corresponding ORs for risk of acute myeloid leukemia (AML) were 1.49 (95% CI: 1.02, 2.16) (173 cases and 1,789 controls), 1.55 (95% CI: 1.21, 1.99) (344 cases and 4,666 controls) and 1.08 (95% CI: 0.76, 1.53) (198 cases and 2,655 controls), respectively. There was little difference by type of pesticide used. The relative similarity in ORs between leukemia types, time periods and pesticide types may be explained by similar exposure patterns and effects across the time periods in ALL and AML, participants' exposure to multiple pesticides, or recall bias. Although some recall bias is likely, until a better study design can be found to investigate the associations between home pesticide use and childhood leukemia in an equally large sample, it would appear prudent to limit the use of home pesticides before and during pregnancy, and during childhood. What's new? Some studies have suggested that early pesticide exposure may increase the risk of childhood leukemia. In this investigation, the authors pooled individual level data from twelve previous case-control studies to further examine this question. They found an association between home pesticide exposure before birth and during a child's early years and acute lymphoblastic leukemia (ALL) and with exposure before birth and acute myeloid leukemia (AML). These results indicate that it would be prudent for parents to limit the use of home pesticides before and after a child's birth.
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Home paint exposures and risk of childhood acute lymphoblastic leukemia: findings from the Childhood Leukemia International ConsortiumBailey, H.; Metayer, C.; Milne, E.; Petridou, E.; Infante-Rivard, C.; Spector, L.; Clavel, J.; Dockerty, J.; Zhang, L.; Armstrong, B.; Rudant, J.; Fritschi, Lin; Amigou, A.; Hatzipantelis, E.; Kang, A.; Stiakaki, E.; Schüz, J. (2015)Purpose: It has been suggested that home paint exposure increases the risk of childhood acute lymphoblastic leukemia (ALL). Methods: We obtained individual level data from eight case–control studies participating in the ...
Greenop, K.; Peters, S.; Bailey, H.; Fritschi, Lin; Attia, J.; Scott, R.; Glass, D.; de Klerk, N.; Alvaro, F.; Armstrong, B.; Milne, Elizabeth (2013)Purpose Previous research has suggested positive associations between parental or childhood exposure to pesticides and risk of childhood brain tumors (CBT). This Australian case–control study of CBT investigated whether ...
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