2025
Incidence of Frailty, Dementia, and Disability Among Community‐Living Older Americans According to County‐Level Disadvantage
Wang Y, Zang E, Davis‐Plourde K, Vander Wyk B, Gill T, Becher R. Incidence of Frailty, Dementia, and Disability Among Community‐Living Older Americans According to County‐Level Disadvantage. Journal Of The American Geriatrics Society 2025, 73: 1847-1856. PMID: 40196885, PMCID: PMC12213133, DOI: 10.1111/jgs.19465.Peer-Reviewed Original ResearchConceptsNational Health and Aging Trends StudyActivities of daily living disabilityActivities of daily livingIncidence of frailtySocial determinants of healthOlder personsOlder AmericansContextual disadvantageAge- and sex-adjusted HRDisadvantaged countiesDeterminants of healthSex-adjusted HRNationally representative longitudinal studyRepresentative longitudinal studyCommunity-livingDaily livingClinically Meaningful OutcomesTrends StudyGeriatric conditionsNo prior studiesNational incidenceIncidence rateDementiaFrailtyCounty-levelCritical Illness, Major Surgery, and Other Hospitalizations and Active and Disabled Life Expectancy
Gill T, Zang E, Leo-Summers L, Gahbauer E, Becher R, Ferrante L, Han L. Critical Illness, Major Surgery, and Other Hospitalizations and Active and Disabled Life Expectancy. JAMA Network Open 2025, 8: e254208. PMID: 40178853, PMCID: PMC11969285, DOI: 10.1001/jamanetworkopen.2025.4208.Peer-Reviewed Original ResearchConceptsActive life expectancyDisabled life expectancyCommunity-living older personsActivities of daily livingFunctional well-beingOlder personsLife expectancyDaily livingEssential activities of daily livingEstimates of active life expectancySurgical admissionsCommunity-living personsCritical illnessMultistate life tablesElective surgical admissionsWell-being of older personsProspective cohort studyMain OutcomesCohort studyWell-beingIllnessLife tablesAge incrementElective surgical proceduresHospitalHealth System, Community-Based, or Usual Dementia Care for Persons With Dementia and Caregivers
Reuben D, Gill T, Stevens A, Williamson J, Volpi E, Lichtenstein M, Jennings L, Galloway R, Summapund J, Araujo K, Bass D, Weitzman L, Tan Z, Evertson L, Yang M, Currie K, Green A, Godoy S, Abraham S, Reese J, Samper-Ternent R, Hirst R, Borek P, Charpentier P, Meng C, Dziura J, Xu Y, Skokos E, He Z, Aiudi S, Peduzzi P, Greene E, Serrano K, Unger E, Arruda L, Bautista L, Callahan C, Maslow K, Ling S, Bonner A, Pace D, Cherry D, Kremer I, Nicholson B, Stephens C, Hendler R, Carnie M, Shelton A, Mignosa B, Funaro B, Eisenmann K, Lu C, Chattopadhyay S, Rhoades D, Lakomski A, Maher D, McCurry D, Williamson S, Moyer S, Robertson L, Tilles A, Battle L, Walker W, Levine S, Knight G, Eaton A, Rose T, Weston E, Orr B, Lang S, Rinaldi S, Shore J, Garboczi L, Phoenix K, Mitchell M, Levan L, Layza M, Musgrave D, Silverman J, Martin A, Nienstedt J, Handoo R, Woolard N, Burcombe D, Hutchens C, Sanghi S, Ocloo A, Essiet S, Shah M, Bartosh H, Banda J, Birchfield T, Roznos T, Collins B, Parker D, Matlock M, Drew L, Jones T, Hill B, Walker J, Wills J, Andrews M, Kroloff S, Brown G, Franz C, Perez G, Castillo E, Flores C, Raji M, Martinez E, Skinkis P, Williams A, Minello S, Sherrod J, Odejimi A, Lockhart M, McDonald A, Gibson D, Tobias N, Spetter K, Finney G, Ladd I, Weaver K, Nicoletto P, Smith D, DeLucca R, Delmar N, Dopko J, Patel M, Berry P, Zimmerman K, Fasciana J, Hendricks L, Freedman K, Gudonis S, Drutarovsky H, Gurzynski A, Shillabeer M, Shipsky K, Cannon C, Rahm A, Sharf L, Kearney K, Liu J, Keeler E, Ruder T. Health System, Community-Based, or Usual Dementia Care for Persons With Dementia and Caregivers. JAMA 2025, 333: 950-961. PMID: 39878968, PMCID: PMC11780506, DOI: 10.1001/jama.2024.25056.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overCaregiversCommunity Health ServicesDementiaFemaleHumansIndependent LivingMaleMiddle AgedConceptsCommunity-based careModified Caregiver Strain IndexHealth system-basedCaregiver Strain IndexCaregiver self-efficacyUsual careDementia careHealth systemCommunity-BasedNPI-QPrimary outcomeApproaches to dementia careCommunity-based dementia careCommunity-based care interventionsSelf-EfficacyDementia care programDementia care specialistsSecondary outcomesStrain indexSystem-based careCommunity-dwelling personsNeuropsychiatric Inventory QuestionnairePatient behavioral symptomsNPI-Q scoresCaregiver outcomesFunctional Trajectories After COVID‐19 Hospitalization Among Older Adults
Ho J, McAvay G, Murphy T, Acampora D, Araujo K, Geda M, Gill T, Hajduk A, Cohen A, Ferrante L. Functional Trajectories After COVID‐19 Hospitalization Among Older Adults. Journal Of The American Geriatrics Society 2025, 73: 1733-1741. PMID: 40096163, PMCID: PMC12213203, DOI: 10.1111/jgs.19420.Peer-Reviewed Original ResearchConceptsIn-hospital deliriumFunction trajectoriesFactors associated with trajectory membershipTrajectory membershipAssociation of potential risk factorsCommunity-dwelling adultsRisk factorsModifiable risk factorsMedical decision-makingOlder survivorsPotential risk factorsOlder adultsSeverity of illnessAssociated with membershipYears of ageCOVID-19 hospitalizationModerate trajectoryLatent class analysisMultinomial regressionSurvive hospitalizationCOVID-19DisabilitySeverity trajectoriesHospitalClass analysisAbsence of care among community-dwelling older adults with dementia and functional limitations
Lin Z, Qian Y, Gill T, Hou X, Allore H, Chen S, Chen X. Absence of care among community-dwelling older adults with dementia and functional limitations. Nature Aging 2025, 5: 548-557. PMID: 40097773, PMCID: PMC12003173, DOI: 10.1038/s43587-025-00836-y.Peer-Reviewed Original ResearchConceptsActivities of daily livingFormal careDaily livingFunctional limitationsInstrumental activitiesInstrumental activities of daily living limitationsActivities of daily living limitationsInstrumental activities of daily livingLongitudinal survey dataCommunity-dwelling older adultsDaily living limitationsRegional development levelAbsence of careCare availabilityCare gapsSurvey dataCare servicesOlder adultsAdequate careEuropean countriesCareVulnerable populationsDevelopment levelInformation supportDementiaNovel indices of state- and county-level social disadvantage in older Americans and disparities in mortality
Wang Y, Zang E, Davis-Plourde K, Gill T, Becher R. Novel indices of state- and county-level social disadvantage in older Americans and disparities in mortality. Health & Place 2025, 92: 103438. PMID: 40058245, PMCID: PMC12142587, DOI: 10.1016/j.healthplace.2025.103438.Peer-Reviewed Original ResearchConceptsIncreased mortality riskContextual disadvantageOlder personsOlder AmericansCommunity-living older personsSocial disadvantageMortality riskIndices of social disadvantageReduce health disparitiesPopulation of older AmericansCounty-levelPublic health policiesNon-disadvantaged groupsMortality disparitiesHealth disparitiesHealth policyMortality existUnited StatesDisadvantaged countiesNegative binomial modelGeriatric populationComposite indexDisparitiesDisadvantaged statesMultidimensional factorsBidirectional relationship between epigenetic age and stroke, dementia, and late-life depression
Rivier C, Szejko N, Renedo D, Clocchiatti-Tuozzo S, Huo S, de Havenon A, Zhao H, Gill T, Sheth K, Falcone G. Bidirectional relationship between epigenetic age and stroke, dementia, and late-life depression. Nature Communications 2025, 16: 1261. PMID: 39893209, PMCID: PMC11787333, DOI: 10.1038/s41467-024-54721-0.Peer-Reviewed Original ResearchThis study shows a bidirectional link between accelerated epigenetic aging and brain health events like stroke, dementia, and depression, supporting new prevention strategies for aging-related conditions.Exposure to School Racial Segregation and Late-Life Cognitive Outcomes
Lin Z, Wang Y, Gill T, Chen X. Exposure to School Racial Segregation and Late-Life Cognitive Outcomes. JAMA Network Open 2025, 8: e2452713. PMID: 39752159, PMCID: PMC11699536, DOI: 10.1001/jamanetworkopen.2024.52713.Peer-Reviewed Original ResearchConceptsCross-sectional studyCognitive scoresOlder adultsTelephone Interview for Cognitive StatusBlack participantsLate-life cognitive outcomesWhite participantsSchool racial segregationCognitive impairmentHealth and Retirement StudyNon-Hispanic whitePrevalence of cognitive impairmentAssociated with late-life cognitionEducational attainmentUS older adultsLikelihood of cognitive impairmentNon-Hispanic blacksLate-life cognitionCognitive outcomesNationally Representative SampleLater-life cognitionMultilevel regression analysisStudy of BlackDementia occurrenceHealth inequalities
2024
Neighborhood Disadvantage in a Nationally Representative Sample of Community-Living Older US Adults
Gill T, Leo-Summers L, Vander Wyk B, Becher R, Liang J. Neighborhood Disadvantage in a Nationally Representative Sample of Community-Living Older US Adults. JAMA Network Open 2024, 7: e2450332. PMID: 39666339, PMCID: PMC11638794, DOI: 10.1001/jamanetworkopen.2024.50332.Peer-Reviewed Original ResearchConceptsNational Health and Aging Trends StudyCommunity-living older adultsNationally Representative SampleNon-Hispanic blacksNeighborhood disadvantageSocioeconomic deprivationOlder adultsIndividual-level socioeconomic characteristicsLong-term mortalityIndicators of socioeconomic deprivationNon-Hispanic white individualsNon-Hispanic white participantsRepresentative sampleCohort studySocioeconomic characteristicsCommunity-living personsNeighborhood socioeconomic disadvantageArea Deprivation IndexOlder US adultsGeriatric characteristicsPopulation-based estimatesAscertainment of mortalityHigher education levelCensus block levelHigh school diplomaIn-Hospital Delirium and Disability and Cognitive Impairment After COVID-19 Hospitalization
Kaushik R, McAvay G, Murphy T, Acampora D, Araujo K, Charpentier P, Chattopadhyay S, Geda M, Gill T, Kaminski T, Lee S, Li J, Cohen A, Hajduk A, Ferrante L. In-Hospital Delirium and Disability and Cognitive Impairment After COVID-19 Hospitalization. JAMA Network Open 2024, 7: e2419640. PMID: 38954414, PMCID: PMC11220565, DOI: 10.1001/jamanetworkopen.2024.19640.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overCognitive DysfunctionCOVID-19DeliriumFemaleHospitalizationHumansMaleMiddle AgedProspective StudiesSARS-CoV-2ConceptsIn-hospital deliriumChart-Based Delirium Identification InstrumentOlder adultsFunctional disabilityCOVID-19 hospitalizationCognitive impairmentCohort studyAssociated with increased functional disabilityHospitalized older adultsIncreased functional disabilityAssociation of deliriumPostdischarge Follow-upRisk of deliriumTertiary care systemFollow-upPresence of cognitive impairmentProspective cohort studyLogistic regression modelsOlder survivorsCare systemIncreasing cognitive impairmentMain OutcomesCOVID-19Hospital dischargePrimary outcomeSocial Determinants of Health and Delivery of Rehabilitation to Older Adults During ICU Hospitalization
Jain S, Murphy T, Falvey J, Leo-Summers L, O’Leary J, Zang E, Gill T, Krumholz H, Ferrante L. Social Determinants of Health and Delivery of Rehabilitation to Older Adults During ICU Hospitalization. JAMA Network Open 2024, 7: e2410713. PMID: 38728030, PMCID: PMC11087837, DOI: 10.1001/jamanetworkopen.2024.10713.Peer-Reviewed Original ResearchConceptsSocial determinants of healthDeterminants of healthOccupational therapyPhysical therapyOlder adultsRural residentsIntensive care unit hospitalizationRehabilitation deliveryIntensive care unitSocial determinantsSocioeconomic disadvantageNational Health and Aging Trends StudyDelivery of physical therapyIllness hospitalizationFactors associated with lower oddsDelivery of rehabilitationIn-hospital rehabilitationMitigate functional declineMedicaid eligibilityBurden of disabilityHigh school educationDual MedicareTrends StudyMedicare claimsLength of stayAssociations of Social Support With Physical and Mental Health Symptom Burden After COVID-19 Hospitalization Among Older Adults
Lee S, McAvay G, Geda M, Chattopadhyay S, Acampora D, Araujo K, Charpentier P, Gill T, Hajduk A, Cohen A, Ferrante L. Associations of Social Support With Physical and Mental Health Symptom Burden After COVID-19 Hospitalization Among Older Adults. The Journals Of Gerontology Series A 2024, 79: glae092. PMID: 38558166, PMCID: PMC11059296, DOI: 10.1093/gerona/glae092.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overCOVID-19FemaleHospitalizationHumansMaleMental HealthMiddle AgedProspective StudiesSARS-CoV-2Social SupportConceptsLow social supportMental health symptomsSocial supportSymptom burdenHealth symptomsFollow-up assessmentCOVID-19 hospitalizationMedical Outcomes Study Social Support SurveyPhysical symptomsAssociation of social supportEdmonton Symptom Assessment SystemPatient Health Questionnaire-4Burden of physical symptomsMental health symptom burdenModified Edmonton Symptom Assessment SystemSocial Support SurveyParticipants' mean ageAssociated with higher burdenSupport SurveyOlder survivorsSymptom managementOlder adultsMental healthHispanic ethnicityLongitudinal associationsNational Estimates of Short- and Longer-Term Hospital Readmissions After Major Surgery Among Community-Living Older Adults
Wang Y, Leo-Summers L, Vander Wyk B, Davis-Plourde K, Gill T, Becher R. National Estimates of Short- and Longer-Term Hospital Readmissions After Major Surgery Among Community-Living Older Adults. JAMA Network Open 2024, 7: e240028. PMID: 38416499, PMCID: PMC10902728, DOI: 10.1001/jamanetworkopen.2024.0028.Peer-Reviewed Original ResearchConceptsCenters for Medicare & Medicaid ServicesFee-for-serviceMedicare Advantage beneficiariesHospital readmissionUS residentsNational Health and Aging Trends Study dataCommunity-living older adultsProspective longitudinal cohort studyCommunity-living participantsRate of hospital readmissionLikelihood of hospital readmissionPopulation-based estimatesNationally representative estimatesSex-adjusted modelsCommunity-livingData linkageGeriatric conditionsMedicaid ServicesOlder personsOlder adultsMain OutcomesNational estimatesRepresentative estimatesData analysisCohort study
2023
Relationship Between Distressing Symptoms and Changes in Disability After Major Surgery Among Community-living Older Persons
Gill T, Han L, Feder S, Gahbauer E, Leo-Summers L, Becher R. Relationship Between Distressing Symptoms and Changes in Disability After Major Surgery Among Community-living Older Persons. Annals Of Surgery 2023, 279: 65-70. PMID: 37389893, PMCID: PMC10761592, DOI: 10.1097/sla.0000000000005984.Peer-Reviewed Original ResearchConceptsMajor surgeryDistressing symptomsElective surgeryFunctional outcomeOlder personsCommunity-living older personsMultiple distressing symptomsSocioeconomic disadvantageCommunity-living personsTiming of surgerySerious health eventsNumber of disabilitiesSurgerySignificant associationSymptomsHealth eventsRate ratioPotential targetDisabilityUnit increaseDeleterious effectsOutcomesPersonsMultimorbidityAdmissionTerminal Decline in Physical Function in Older Adults
Stolz E, Mayerl H, Muniz-Terrera G, Gill T. Terminal Decline in Physical Function in Older Adults. The Journals Of Gerontology Series A 2023, 79: glad119. PMID: 37148208, PMCID: PMC10733182, DOI: 10.1093/gerona/glad119.Peer-Reviewed Original ResearchDistressing symptoms after major surgery among community‐living older persons
Gill T, Han L, Murphy T, Feder S, Gahbauer E, Leo‐Summers L, Becher R. Distressing symptoms after major surgery among community‐living older persons. Journal Of The American Geriatrics Society 2023, 71: 2430-2440. PMID: 37010784, PMCID: PMC10524276, DOI: 10.1111/jgs.18357.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overFemaleHospitalizationHumansLongitudinal StudiesMalePatient DischargeProspective StudiesQuality of LifeConceptsCommunity-living older personsMajor surgeryDistressing symptomsArea Deprivation IndexOlder personsSocioeconomic disadvantageCommunity-living personsTiming of surgeryProspective longitudinal studyYears of ageQuality of lifeSymptom burdenNonelective surgeryPresurgery valuesElective surgeryMultivariable analysisFunctional outcomeNonelective proceduresChronic conditionsSurgerySymptomsProportional increaseMedicaid eligibilityDeprivation indexMonthsAssessing the contributions of modifiable risk factors to serious falls and fragility fractures among older persons living with HIV
Womack J, Murphy T, Leo‐Summers L, Bates J, Jarad S, Gill T, Hsieh E, Rodriguez‐Barradas M, Tien P, Yin M, Brandt C, Justice A. Assessing the contributions of modifiable risk factors to serious falls and fragility fractures among older persons living with HIV. Journal Of The American Geriatrics Society 2023, 71: 1891-1901. PMID: 36912153, PMCID: PMC10258163, DOI: 10.1111/jgs.18304.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overAlcoholismCohort StudiesFractures, BoneFrailtyHIV InfectionsHumansRisk FactorsConceptsModifiable risk factorsFragility fracturesRisk factorsAlcohol use disorderSerious fallsPhysiologic frailtyAntiretroviral therapyOlder PWHUse disordersVeterans Aging Cohort StudyMeasures of multimorbidityAging Cohort StudyBody mass indexMultivariable logistic modelAverage attributable fractionSuccessful prevention programsKey risk factorsOpioid prescriptionsCohort studyMass indexModifiable factorsSixth decadeAttributable fractionElevated riskICD9 codes
2022
Factors Associated With Days Away From Home in the Year After Major Surgery Among Community-living Older Persons
Gill TM, Becher RD, Murphy TE, Gahbauer EA, Leo-Summers L, Han L. Factors Associated With Days Away From Home in the Year After Major Surgery Among Community-living Older Persons. Annals Of Surgery 2022, 278: e13-e19. PMID: 35837967, PMCID: PMC9840715, DOI: 10.1097/sla.0000000000005528.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overHospitalizationHospitalsHumansPatient DischargeQuality of LifeRisk FactorsConceptsHealth care facilitiesMajor surgeryAge 85 yearsCare facilitiesOlder personsRisk factorsNumber of daysLower peak expiratory flowCommunity-living older personsShort Physical Performance BatteryIndependent risk factorCommunity-living personsPhysical Performance BatteryPeak expiratory flowCandidate risk factorsQuality of lifeHospital dischargeMultivariable analysisExpiratory flowMedian numberPerformance BatteryMusculoskeletal surgerySurgeryMean differenceHospital
2021
The Incidence and Cumulative Risk of Major Surgery in Older Persons in the United States
Becher RD, Vander Wyk B, Leo-Summers L, Desai MM, Gill TM. The Incidence and Cumulative Risk of Major Surgery in Older Persons in the United States. Annals Of Surgery 2021, 277: 87-92. PMID: 34261884, PMCID: PMC8758792, DOI: 10.1097/sla.0000000000005077.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overDementiaHumansIncidenceLongitudinal StudiesMedicareProspective StudiesUnited StatesConceptsMajor surgeryOlder personsCumulative riskNational HealthCommunity-living older personsHigh-quality surgical careNon-frail groupPopulation-based incidenceService Medicare beneficiariesMedicaid Services dataCumulative risk estimatesProspective longitudinal studyUnited States agesAging Trends StudyGeriatric characteristicsRepresentative incidenceFrail groupAdjusted incidenceGeriatric populationProbable dementiaSurgical carePersons 85Medicare beneficiariesSurgeryVulnerable subgroups
2020
Functional Effects of Intervening Illnesses and Injuries After Hospitalization for Major Surgery in Community-living Older Persons
Gill TM, Han L, Gahbauer EA, Leo-Summers L, Murphy TE, Becher RD. Functional Effects of Intervening Illnesses and Injuries After Hospitalization for Major Surgery in Community-living Older Persons. Annals Of Surgery 2020, 273: 834-841. PMID: 33074902, PMCID: PMC8370041, DOI: 10.1097/sla.0000000000004438.Peer-Reviewed Original ResearchConceptsMajor surgeryED visitsRestricted activityFunctional statusFunctional declineOlder personsCommunity-living older personsAdjusted hazard ratioAdverse functional outcomesCommunity-living personsEmergency department visitsTraditional risk factorsCorresponding odds ratiosFunctional effectsIllness/injuryHazard ratioDepartment visitsFunctional recoveryFunctional outcomeRisk factorsOdds ratioHospitalizationSurgeryInjuryVisits
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