2025
Disparities in NO2-related health burden prevalent across race-ethnicity and income groups in the United States
Chu L, Ma Y, Zang E, Huang L, Chen K. Disparities in NO2-related health burden prevalent across race-ethnicity and income groups in the United States. One Earth 2025, 101387. DOI: 10.1016/j.oneear.2025.101387.Peer-Reviewed Original ResearchHigh-income countiesRace-EthnicityNon-Hispanic black populationHealth burdenRacial-ethnic disparitiesRace-ethnic groupsIncome groupsLow-income countiesQuasi-Poisson regressionRacial-ethnic minoritiesMortality disparitiesUnited StatesHealthcare strategiesMortality burdenDescriptive statisticsRelative riskDisparitiesBlack populationNO2 exposureBurdenMortality rateCountyIncomeTargeted policiesMortalityFloods and cause-specific mortality in the United States applying a triply robust approach
Chu L, Warren J, Spatz E, Lowe S, Lu Y, Ma X, Ross J, Krumholz H, Chen K. Floods and cause-specific mortality in the United States applying a triply robust approach. Nature Communications 2025, 16: 2853. PMID: 40122917, PMCID: PMC11930965, DOI: 10.1038/s41467-025-58236-0.Peer-Reviewed Original ResearchConceptsCDC's National Center for Health StatisticsNational Center for Health StatisticsCause-specific mortality ratesCenter for Health StatisticsCause-specific mortalityHealth impacts of floodingExcess all-cause deathsLong-term health risksFlood daysLong-term associationDeath recordsHealth StatisticsConfounder adjustmentExternal causesStorm Events DatabaseAll-cause deathHealth impactsImpact of floodsPropensity scorePost‐flood yearMortality rateMyocardial infarctionPost-floodContiguous U.S.Respiratory diseaseShort-term exposure to ambient nitrogen dioxide and fine particulate matter and cause-specific mortality: A causal modeling approach in four regions
Marb A, Ma Y, Nobile F, Dubrow R, Kinney P, Stafoggia M, Chen K, Peters A, Breitner S. Short-term exposure to ambient nitrogen dioxide and fine particulate matter and cause-specific mortality: A causal modeling approach in four regions. Environmental Pollution 2025, 372: 126059. PMID: 40089139, DOI: 10.1016/j.envpol.2025.126059.Peer-Reviewed Original ResearchParticulate matterAir pollutionDaily NO2 anShort-term air pollution exposureNitrogen dioxideDaily air pollution dataExposure to NO2Effects of air pollutionShort-term exposure to NO2 anFine particulate matterTwo-pollutant modelsExposure to ambient nitrogen dioxideAmbient air pollutionAmbient particulate matterAir pollution dataAir pollution exposureCause-specific mortality ratesAmbient nitrogen dioxideRural populationCause-specific mortalityRespiratory mortality ratesMortality rateCause-specific deathCardiovascular mortality ratesPollution exposure
2024
Long-term exposure to wildland fire smoke PM2.5 and mortality in the contiguous United States
Ma Y, Zang E, Liu Y, Wei J, Lu Y, Krumholz H, Bell M, Chen K. Long-term exposure to wildland fire smoke PM2.5 and mortality in the contiguous United States. Proceedings Of The National Academy Of Sciences Of The United States Of America 2024, 121: e2403960121. PMID: 39316057, PMCID: PMC11459178, DOI: 10.1073/pnas.2403960121.Peer-Reviewed Original ResearchConceptsWildland firesContiguous United StatesNonaccidental mortalityExposure to ambient fine particlesSmoke PMWildland fire smokeMoving average concentrationsAmbient fine particlesLong-term exposureAverage concentrationSmoke PMHealth risksFine particlesFire smokeTemporal confoundingHealth effectsKidney disease mortalityChronic kidney disease mortalityPublic health actionFireMortality rateUnited StatesDisease mortalityHealth actionsMortality outcomesShort-Term Exposure to Fine Particulate Matter and Nitrogen Dioxide and Mortality in 4 Countries
Ma Y, Nobile F, Marb A, Dubrow R, Stafoggia M, Breitner S, Kinney P, Chen K. Short-Term Exposure to Fine Particulate Matter and Nitrogen Dioxide and Mortality in 4 Countries. JAMA Network Open 2024, 7: e2354607. PMID: 38427355, PMCID: PMC10907920, DOI: 10.1001/jamanetworkopen.2023.54607.Peer-Reviewed Original ResearchConceptsShort-term exposure to air pollutionExposure to air pollutionFine particulate matterCross-sectional studyAir pollutionFixed-effects modelParticulate matterShort-term exposure to PM2.5Short-term exposure to fine particulate matterNO2 concentrationsExposure to fine particulate matterMortality rateNitrogen dioxideSignificant effect modificationDaily PM2.5 concentrationsTime-varying confoundersExposure to PM2.5Health outcomesEstimate associationsMortality dataEffect modificationPM2.5 concentrationsMain OutcomesDay-to-dayCentral-southern Italy
2023
Racial/ethnic disparities in PM2.5-attributable cardiovascular mortality burden in the United States
Ma Y, Zang E, Opara I, Lu Y, Krumholz H, Chen K. Racial/ethnic disparities in PM2.5-attributable cardiovascular mortality burden in the United States. Nature Human Behaviour 2023, 7: 2074-2083. PMID: 37653149, PMCID: PMC10901568, DOI: 10.1038/s41562-023-01694-7.Peer-Reviewed Original ResearchConceptsNon-Hispanic White peopleCVD deathMortality burdenNon-Hispanic black peopleCardiovascular disease mortality ratesDisease mortality ratesNon-Hispanic blacksRace/ethnicityMortality rateLong-term exposureWhite peopleEthnic disparitiesHealth benefitsHispanic peopleSignificant differencesBurdenDeathUS countiesEthnic groupsAbsolute disparityAssociationExposureEthnic minoritiesDisparitiesAmbient fine particulate matter (PM2.5) concentrations
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