Objective We studied the association between occupa-tional exposure to extremely low-frequency magnetic fields (ELF-MF) and electrical shocks and acute myeloid leuke-mia (AML) in the Nordic Occupational Cancer cohort (NOCCA). Methods We included 5,409 adult AML cases diagnosed between 1961 and 2005 in Finland, Iceland, Norway, and Sweden and 27,045 controls matched by age, sex, and country. Lifetime occupational ELF-MF exposure and risk of electrical shocks were assigned to jobs reported in the censuses using job-exposure matrices. We estimated haz-ard ratios (HRs) and 95 % confidence intervals (95 % CIs) using conditional logistic regression adjusted for concur-rent occupational exposures relevant for AML risk (e.g., benzene, ionizing radiation). We conducted sensitivity analyses with different assumptions to assess the robust-ness of our results.
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