2025
Racial and ethnic disparities in exposure to short-term NO2 air pollution in California during 1980–2022
Liu R, Chu L, Rogne T, Ma X, Chen K. Racial and ethnic disparities in exposure to short-term NO2 air pollution in California during 1980–2022. Journal Of Hazardous Materials 2025, 496: 139309. PMID: 40695125, DOI: 10.1016/j.jhazmat.2025.139309.Peer-Reviewed Original ResearchConceptsShort-term NO2 exposure anChemical transport model outputExposure to ambient nitrogen dioxideNO2 air pollutionAmbient nitrogen dioxideTransport model outputAir pollutionNitrogen dioxideSpatiotemporal variationsIsland groupsCoefficient of determinationStudy periodModel outputAlaskaConcentrationGeospatial dataExposureCaliforniaEnvironmental justice literaturePollutionEffect of Air Pollution Reductions on Mortality During the COVID-19 Lockdowns in Early 2020.
Chen K, Ma Y, Marb A, Nobile F, Dubrow R, Stafoggia M, Breitner S, Kinney P. Effect of Air Pollution Reductions on Mortality During the COVID-19 Lockdowns in Early 2020. Research Report 2025, 2025: 1-47. PMID: 40551404, PMCID: PMC12185919.Peer-Reviewed Original ResearchConceptsAir pollution changesAir pollutionPollution changesShort-term exposure to PM2.5Air qualityExposure to PM2.5Natural-causeMeteorological normalization techniqueFine particulate matterDaily air pollutionImprove air qualityAir pollutant emissionsAir pollution reductionEmission control strategiesSouthern ItalyQuantify changesAir pollution-mortality relationshipPollution-mortality relationshipCOVID-19 lockdownShort-term exposureNOParticulate matterMeteorological impactsNitrogen dioxidePollution reduction
2024
High ambient temperature in pregnancy and risk of childhood acute lymphoblastic leukaemia: an observational study
Rogne T, Wang R, Wang P, Deziel N, Metayer C, Wiemels J, Chen K, Warren J, Ma X. High ambient temperature in pregnancy and risk of childhood acute lymphoblastic leukaemia: an observational study. The Lancet Planetary Health 2024, 8: e506-e514. PMID: 38969477, PMCID: PMC11260908, DOI: 10.1016/s2542-5196(24)00121-9.Peer-Reviewed Original ResearchConceptsRisk of childhood acute lymphoblastic leukemiaChildhood acute lymphoblastic leukemiaAcute lymphoblastic leukemiaLymphoblastic leukemiaLatino childrenNon-Latino white childrenAssociated with risk of adverse pregnancy outcomesCalifornia Cancer RegistryRisk of acute lymphoblastic leukemiaCalifornia birth recordsRisk of adverse pregnancy outcomesPre-pregnancy periodAssociated with riskBayesian meta-regressionNational Institutes of HealthCancer RegistryCases of childhood acute lymphoblastic leukemiaNational Center for Advancing Translational SciencesAdverse pregnancy outcomesAcute lymphoblastic leukemia casesInstitutes of HealthInvestigation of mechanistic pathwaysBirth recordsGestational weeks 8Pre-pregnancyAir pollution changes due to COVID-19 lockdowns and attributable mortality changes in four countries
Ma Y, Nobile F, Marb A, Dubrow R, Kinney P, Peters A, Stafoggia M, Breitner S, Chen K. Air pollution changes due to COVID-19 lockdowns and attributable mortality changes in four countries. Environment International 2024, 187: 108668. PMID: 38640613, DOI: 10.1016/j.envint.2024.108668.Peer-Reviewed Original ResearchConceptsMeteorological normalization techniqueAir pollution changesFine particulate matterImprove air qualityEmission control strategiesCentral-southern ItalyPollution changesParticulate matterRegion-specific estimatesAir qualityMeteorological impactsAir pollutionPollutionCOVID-19 lockdownModeling approachAirCaliforniaMortality changesConcentrationJiangsuEmissionTime trendsLocal characteristicsChinaMatter
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