Exploring the potential confounder of nitrogen fertilizers in the relationship between pesticide exposures and risk of leukemia:a Poisson regression with two-way fixed-effects analysis

Dear Editor,Research discussing potential environmental toxins that may be related to the etiology of childhood leukemia has been growing.The suspected environmental contaminants include solvents,air pollutants,pesticides,and tobacco smoke.Exposure to various pesticides has come under particular scrutiny,with positive associations with childhood leukemia[1].Poynter et al.[2]conducted a population-based study assessing the association between self-reported chemical exposures and odds of acute myeloid leukemia(AML)and myelodysplastic syndromes(MDS).The authors found no clear association