RT Journal Article SR Electronic T1 Parental occupational exposure to low-frequency magnetic fields and risk of leukaemia in the offspring: findings from the Childhood Leukaemia International Consortium (CLIC) JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 746 OP 753 DO 10.1136/oemed-2019-105706 VO 76 IS 10 A1 Madar Talibov A1 Ann Olsson A1 Helen Bailey A1 Friederike Erdmann A1 Catherine Metayer A1 Corrado Magnani A1 Eleni Petridou A1 Anssi Auvinen A1 Logan Spector A1 Jacqueline Clavel A1 Eve Roman A1 John Dockerty A1 Atte Nikkilä A1 Olli Lohi A1 Alice Kang A1 Theodora Psaltopoulou A1 Lucia Miligi A1 Javier Vila A1 Elisabeth Cardis A1 Joachim Schüz YR 2019 UL http://oem.bmj.com/content/76/10/746.abstract AB Objectives Previously published studies on parental occupational exposure to extremely low-frequency magnetic fields (ELF-MF) and risk of acute lymphoblastic leukaemia (ALL) and acute myeloid leukaemia (AML) in their offspring were inconsistent. We therefore evaluated this question within the Childhood Leukemia International Consortium.Methods We pooled 11 case–control studies including 9723 childhood leukaemia cases and 17 099 controls. Parental occupational ELF-MF exposure was estimated by linking jobs to an ELF-MF job-exposure matrix (JEM). Logistic regression models were used to estimate ORs and 95% CIs in pooled analyses and meta-analyses.Results ORs from pooled analyses for paternal ELF-MF exposure >0.2 microtesla (µT) at conception were 1.04 (95% CI 0.95 to 1.13) for ALL and 1.06 (95% CI 0.87 to 1.29) for AML, compared with ≤0.2 µT. Corresponding ORs for maternal ELF-MF exposure during pregnancy were 1.00 (95% CI 0.89 to 1.12) for ALL and 0.85 (95% CI 0.61 to 1.16) for AML. No trends of increasing ORs with increasing exposure level were evident. Furthermore, no associations were observed in the meta-analyses.Conclusions In this large international dataset applying a comprehensive quantitative JEM, we did not find any associations between parental occupational ELF-MF exposure and childhood leukaemia.