ArticleEnvironmental research2026
Maternal serum concentrations of persistent organic pollutants and childhood acute lymphoblastic leukemia in the Finnish Maternity Cohort.
Article in Environmental research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
BACKGROUND/
aimsChildren are exposed to persistent organic pollutants (POPs) including polychlorinated biphenyls (PCBs) and organochlorine pesticides through in utero transfer from maternal serum. Few studies have evaluated the relationship between POPs and childhood leukemia risk.
methodsThe Finnish Maternity Cohort is a population-based pregnancy cohort with banked serum and linkages to cancer registry and other databases. We measured first-trimester levels of 25 POPs in maternal sera collected in 1986-2010 for 388 childhood acute lymphoblastic leukemia (ALL) cases (<15 years) and 388 controls matched on sample date, gestational age (≥37 weeks; ± 1 week), birth order (first/second), mother's age, and child's sex. We analyzed lipid-adjusted POPs as continuous (log
resultsPOPs detected in >80% of controls included trans-nonachlor (93%), p',p'-dichlorodiphenylethylene (p',p'-DDE; 100%), hexachlorobenzene (99%), β-hexachlorocyclohexane (β-HCH; 84%), and 10 PCBs (range: 84-100%). Increasing trans-nonachlor concentrations were associated with ALL (adjusted OR
conclusionOur findings suggest that trans-nonachlor and some PCBs may increase childhood leukemia risk with unexplained inverse associations for β-HCH and p',p'-DDE.
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