2024
National 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 studyPrior Influenza Infection Mitigates SARS-CoV-2 Disease in Syrian Hamsters
Di Pietro C, Haberman A, Lindenbach B, Smith P, Bruscia E, Allore H, Vander Wyk B, Tyagi A, Zeiss C. Prior Influenza Infection Mitigates SARS-CoV-2 Disease in Syrian Hamsters. Viruses 2024, 16: 246. PMID: 38400021, PMCID: PMC10891789, DOI: 10.3390/v16020246.Peer-Reviewed Original ResearchConceptsTransient gene expressionSARS-CoV-2Viral replication pathwayReplication pathwayAntiviral pathwaysEndemism patternsUpregulation of innateGene expressionQuantitative RT-PCRMitigated weight lossDual-infected animalsSARS-CoV-2 viral loadSARS-CoV-2 infectionSyrian hamstersSeasonal infection ratesSARS-CoV-2 inoculationLungs of animalsIndividual virusesSARS-CoV-2 diseaseUpper respiratory tractH1N1 infectionRT-PCRBronchoalveolar lavageViral loadCytokine levels
2023
Dectin-1 stimulation promotes a distinct inflammatory signature in the setting of HIV-infection and aging
Kumar A, Wang J, Esterly A, Radcliffe C, Zhou H, Wyk B, Allore H, Tsang S, Barakat L, Mohanty S, Zhao H, Shaw A, Zapata H. Dectin-1 stimulation promotes a distinct inflammatory signature in the setting of HIV-infection and aging. Aging 2023, 15: 7866-7908. PMID: 37606991, PMCID: PMC10497004, DOI: 10.18632/aging.204927.Peer-Reviewed Original ResearchConceptsDectin-1 stimulationDendritic cellsHIV-positive older adultsOlder adultsDectin-1 functionDistinct immune signaturesDistinct inflammatory signatureMonocytes of HIVCohort of HIVIFN-α productionPro-inflammatory environmentIFN-γ responsesPro-inflammatory phenotypeInnate immune receptorsDistinct gene signaturesStimulation of monocytesInflammatory signatureImmune signaturesHIV infectionIL-12Macrophage signatureCytokine productionIL-6Cytokine increaseHIVAssociations between dementia staging, neuropsychiatric behavioral symptoms, and divorce or separation in late life: A case control study
Monin J, McAvay G, Zang E, Vander Wyk B, Carrión C, Allore H. Associations between dementia staging, neuropsychiatric behavioral symptoms, and divorce or separation in late life: A case control study. PLOS ONE 2023, 18: e0289311. PMID: 37585365, PMCID: PMC10431668, DOI: 10.1371/journal.pone.0289311.Peer-Reviewed Original ResearchConceptsAdjusted odds ratioAlzheimer's Disease Research CenterAgitation/aggressionDepression/dysphoriaCase-control studyElation/euphoriaNational Alzheimer's Coordinating CenterDisease Research CenterBehavioral symptomsDivorce/separationOlder adultsCoordinating CenterDementia stagingConditional logistic regressionStages of dementiaCase/control statusInitial visitOdds ratioIndividual symptomsNPI scoresStandardized clinical informationClinical informationMarried casesGreater oddsControl studyInteraction Between Frailty and Dementia—Reply
Gill T, Vander Wyk B, Becher R. Interaction Between Frailty and Dementia—Reply. JAMA Surgery 2023, 158: 889-889. PMID: 37017979, DOI: 10.1001/jamasurg.2023.0381.Commentaries, Editorials and LettersPlatelet response to influenza vaccination reflects effects of aging
Konstorum A, Mohanty S, Zhao Y, Melillo A, Vander Wyk B, Nelson A, Tsang S, Blevins T, Belshe R, Chawla D, Rondina M, Gill T, Montgomery R, Allore H, Kleinstein S, Shaw A. Platelet response to influenza vaccination reflects effects of aging. Aging Cell 2023, 22: e13749. PMID: 36656789, PMCID: PMC9924941, DOI: 10.1111/acel.13749.Peer-Reviewed Original ResearchConceptsCommunity-dwelling older adultsPlatelet activationOlder adultsInfluenza vaccinationAge-associated chronic inflammationInfluence platelet functionRNA expressionPro-inflammatory diseasesAge-associated increasePlatelet activation pathwaysAge-associated differencesActivation pathwayPlatelet transcriptomeGeriatric conditionsChronic inflammationImmune responsePlatelet functionPlatelet responseSNF residentsVaccinationActivation responseYoung individualsProtein levelsAdultsYounger participants
2022
Population-Based Estimates of 1-Year Mortality After Major Surgery Among Community-Living Older US Adults
Gill TM, Vander Wyk B, Leo-Summers L, Murphy TE, Becher RD. Population-Based Estimates of 1-Year Mortality After Major Surgery Among Community-Living Older US Adults. JAMA Surgery 2022, 157: e225155. PMID: 36260323, PMCID: PMC9582971, DOI: 10.1001/jamasurg.2022.5155.Peer-Reviewed Original ResearchConceptsPopulation-based estimatesMajor surgeryMean survival timeOlder US adultsProbable dementiaUS adultsSurvival timeSex-adjusted hazard ratioProspective longitudinal cohort studyCommunity-living older adultsLongitudinal cohort studyPotential prognostic valueService Medicare beneficiariesNon-Hispanic blacksNon-Hispanic whitesAging Trends StudyGeriatric characteristicsCohort studyGeriatric surgeryHazard ratioNonelective surgeryElective surgeryGeriatric conditionsPrognostic valueMean ageReview and evaluation of imputation methods for multivariate longitudinal data with mixed‐type incomplete variables
Cao Y, Allore H, Vander Wyk B, Gutman R. Review and evaluation of imputation methods for multivariate longitudinal data with mixed‐type incomplete variables. Statistics In Medicine 2022, 41: 5844-5876. PMID: 36220138, PMCID: PMC9771917, DOI: 10.1002/sim.9592.Peer-Reviewed Original ResearchConceptsImputation methodsEfficient imputation methodJoint modelingIntensive computationAccessible softwareData patternsIncomplete longitudinal dataMultivariate longitudinal dataMissing valuesData variablesIncomplete variablesMultivariate distributionsMultiple imputation procedureConditional distributionLinear multilevel modelsHierarchical modelEntire setImputation procedureVariance estimatesMI methodConditional specificationConditional modelSetSoftwareMultiple imputationDevelopment and validation of a prediction model for persistent functional impairment among older ICU survivors
Ferrante LE, Murphy TE, Leo‐Summers L, O'Leary JR, Vander Wyk B, Pisani MA, Gill TM. Development and validation of a prediction model for persistent functional impairment among older ICU survivors. Journal Of The American Geriatrics Society 2022, 71: 188-197. PMID: 36196998, PMCID: PMC9870848, DOI: 10.1111/jgs.18075.Peer-Reviewed Original ResearchConceptsPersistent functional impairmentICU hospitalizationFunctional impairmentValidation cohortICU admissionDevelopment cohortOlder Intensive Care Unit SurvivorsIntensive care unit survivorsOlder adultsOlder ICU survivorsMonths of dischargeHigh-risk survivorsCommunity-living participantsGood calibrationHospital lengthICU survivorsCritical illnessMedian agePrior hospitalizationFunctional recoveryNational HealthProbable dementiaHospitalizationHigh riskDepressive symptomsThe Contribution of Chronic Conditions to Hospitalization, Skilled Nursing Facility Admission, and Death: Variation by Race
Quiñones AR, McAvay GJ, Peak KD, Vander Wyk B, Allore HG. The Contribution of Chronic Conditions to Hospitalization, Skilled Nursing Facility Admission, and Death: Variation by Race. American Journal Of Epidemiology 2022, 191: 2014-2025. PMID: 35932162, PMCID: PMC10144669, DOI: 10.1093/aje/kwac143.Peer-Reviewed Original ResearchConceptsSkilled nursing facility admissionsNursing facility admissionsChronic conditionsFacility admissionMedicare beneficiariesCostly health care utilizationHealth care utilizationRacial differencesNon-Hispanic blacksWhite Medicare beneficiariesAverage attributable fractionHealth-related outcomesImportant health-related outcomesNon-Hispanic White older adultsWhite older adultsAging Trends StudyMultimorbidity burdenRenal morbidityOngoing careAttributable fractionNational HealthCardiovascular conditionsOlder adultsImportant markerHospitalizationMaintenance on extended-release naltrexone is associated with reduced injection opioid use among justice-involved persons with opioid use disorder
Lier AJ, Seval N, Vander Wyk B, Di Paola A, Springer SA. Maintenance on extended-release naltrexone is associated with reduced injection opioid use among justice-involved persons with opioid use disorder. Journal Of Substance Use And Addiction Treatment 2022, 142: 108852. PMID: 35988513, PMCID: PMC9509444, DOI: 10.1016/j.jsat.2022.108852.Peer-Reviewed Original ResearchConceptsInjection opioid useOpioid use disorderHepatitis C virusOpioid useXR-NTXOpioid injectionUse disordersDouble-blind placebo-controlled trialExtended-release naltrexonePlacebo-controlled trialCopies/mLIntravenous opioid useTransmission of HIVJustice-involved populationsJustice-involved participantsInjection equipmentHigh treatment groupJustice-involved personsHCV antibodiesHIV RNAPlacebo groupTreat analysisC virusInjection useJustice-involved individualsFactors associated with retention on medications for opioid use disorder among a cohort of adults seeking treatment in the community
Biondi BE, Vander Wyk B, Schlossberg EF, Shaw A, Springer SA. Factors associated with retention on medications for opioid use disorder among a cohort of adults seeking treatment in the community. Addiction Science & Clinical Practice 2022, 17: 15. PMID: 35255967, PMCID: PMC8899775, DOI: 10.1186/s13722-022-00299-1.Peer-Reviewed Original ResearchConceptsOpioid use disorderHigher pain interferenceMOUD retentionPain interferenceUse disordersOngoing prospective cohort studySevere opioid use disorderProspective cohort studyMultivariable logistic regressionCohort of adultsMethadone doseAnalgesic effectBuprenorphine doseCohort studyOpioid useResultsA totalHigher oddsMOUDAdjusted modelHigh doseLogistic regressionBuprenorphineMethadoneDoseDiscontinuationSynaptic density and cognitive performance in Alzheimer's disease: A PET imaging study with [11C]UCB‐J
Mecca AP, O'Dell RS, Sharp ES, Banks ER, Bartlett HH, Zhao W, Lipior S, Diepenbrock NG, Chen M, Naganawa M, Toyonaga T, Nabulsi NB, Vander Wyk B, Arnsten AFT, Huang Y, Carson RE, van Dyck C. Synaptic density and cognitive performance in Alzheimer's disease: A PET imaging study with [11C]UCB‐J. Alzheimer's & Dementia 2022, 18: 2527-2536. PMID: 35174954, PMCID: PMC9381645, DOI: 10.1002/alz.12582.Peer-Reviewed Original ResearchConceptsSynaptic densityEarly Alzheimer's diseaseAlzheimer's diseaseCognitive performanceMajor pathological correlateGray matter volumePositron emission tomography (PET) imagingEmission Tomography ImagingPET imaging studiesIndividual cognitive domainsNeuropathologic studiesSignificant positive associationSynapse lossSynaptic alterationsPathological correlatesNeuropsychological test performanceMatter volumeCognitive impairmentSignificant associationImaging studiesDiseaseTomography imagingGlobal cognitionStrongest predictorPositive associationRisk Factors of Skilled Nursing Facility Admissions and the Interrelation With Hospitalization and Amount of Informal Caregiving Received
Cao Y, Allore H, Gutman R, Vander Wyk B, Jørgensen TSH. Risk Factors of Skilled Nursing Facility Admissions and the Interrelation With Hospitalization and Amount of Informal Caregiving Received. Medical Care 2022, 60: 294-301. PMID: 35149662, PMCID: PMC8916995, DOI: 10.1097/mlr.0000000000001697.Peer-Reviewed Original ResearchConceptsSkilled nursing facility admissionsNursing facility admissionsNumber of hospitalizationsSNF admissionImportant risk factorRisk factorsHospital admissionFacility admissionNon-Hispanic white race/ethnicityWhite race/ethnicityInformal caregivingWeak positive correlationDaily living (ADL) disabilityPossible risk factorsPositive correlationAging Trends StudyRace/ethnicityObservational followStrong positive correlationNational HealthAdmissionDementia diagnosisHospitalizationAlzheimer's diseaseHealth factors
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 ResearchConceptsMajor 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 subgroupsComparison of [11C]UCB-J and [18F]FDG PET in Alzheimer’s disease: A tracer kinetic modeling study
Chen MK, Mecca AP, Naganawa M, Gallezot JD, Toyonaga T, Mondal J, Finnema SJ, Lin SF, O’Dell R, McDonald JW, Michalak HR, Vander Wyk B, Nabulsi NB, Huang Y, Arnsten AF, van Dyck CH, Carson RE. Comparison of [11C]UCB-J and [18F]FDG PET in Alzheimer’s disease: A tracer kinetic modeling study. Cerebrovascular And Brain Metabolism Reviews 2021, 41: 2395-2409. PMID: 33757318, PMCID: PMC8393289, DOI: 10.1177/0271678x211004312.Peer-Reviewed Original ResearchConceptsSynaptic densityMedial temporal regionsAlzheimer's diseaseNeocortical regionsTemporal regionsRelative outcome measuresMedial temporal lobeVivo PET imagingJ bindingOutcome measuresTemporal lobeMagnitude of reductionCN participantsBrain regionsAD participantsDiseasePET imagingConcordant reductionNormal participantsSynaptic vesiclesPerfusionMetabolismSuitable markerParticipantsSimilar patternAssociation of Aβ deposition and regional synaptic density in early Alzheimer’s disease: a PET imaging study with [11C]UCB-J
O’Dell R, Mecca AP, Chen MK, Naganawa M, Toyonaga T, Lu Y, Godek TA, Harris JE, Bartlett HH, Banks ER, Kominek VL, Zhao W, Nabulsi NB, Ropchan J, Ye Y, Vander Wyk BC, Huang Y, Arnsten AFT, Carson RE, van Dyck CH. Association of Aβ deposition and regional synaptic density in early Alzheimer’s disease: a PET imaging study with [11C]UCB-J. Alzheimer's Research & Therapy 2021, 13: 11. PMID: 33402201, PMCID: PMC7786921, DOI: 10.1186/s13195-020-00742-y.Peer-Reviewed Original ResearchConceptsRegional Aβ depositionAβ depositionEarly Alzheimer's diseaseSynaptic lossSynaptic densityAlzheimer's diseaseDistribution volume ratioPositron emission tomographyHippocampal synaptic densityMild AD dementiaDeposition of AβSignificant inverse associationAmnestic mild cognitive impairmentWhole-brain analysisMild cognitive impairmentCerebellar reference regionPET imaging studiesPlaque burdenAD dementiaInverse associationPostmortem studiesClinical severityNeurodegenerative processesClinical diseaseLarge cohort
2020
Individual Heterogeneity in the Probability of Hospitalization, Skilled Nursing Facility Admission, and Mortality
McAvay GJ, Vander Wyk B, Allore H. Individual Heterogeneity in the Probability of Hospitalization, Skilled Nursing Facility Admission, and Mortality. The Journals Of Gerontology Series A 2020, 76: 1668-1677. PMID: 33320184, PMCID: PMC8361334, DOI: 10.1093/gerona/glaa314.Peer-Reviewed Original ResearchConceptsSkilled nursing facility admissionsNursing facility admissionsChronic kidney diseaseHeart failureFacility admissionKidney diseaseChronic conditionsChronic obstructive pulmonary diseaseObstructive pulmonary diseaseIschemic heart diseaseHealth care utilizationProbability of hospitalizationPulmonary diseaseCare utilizationMortality outcomesPoor outcomeHeart diseaseNational HealthOdds ratioDisease combinationsLongitudinal cohortSociodemographic factorsMedicaid ServicesDiseaseAging StudyIn vivo measurement of widespread synaptic loss in Alzheimer's disease with SV2A PET
Mecca AP, Chen M, O'Dell RS, Naganawa M, Toyonaga T, Godek TA, Harris JE, Bartlett HH, Zhao W, Nabulsi NB, Vander Wyk B, Varma P, Arnsten AFT, Huang Y, Carson RE, van Dyck C. In vivo measurement of widespread synaptic loss in Alzheimer's disease with SV2A PET. Alzheimer's & Dementia 2020, 16: 974-982. PMID: 32400950, PMCID: PMC7383876, DOI: 10.1002/alz.12097.Peer-Reviewed Original ResearchConceptsWidespread synaptic lossEarly Alzheimer's diseaseSynaptic lossAlzheimer's diseaseSynaptic vesicle glycoprotein 2AGray matter volumeMajor structural correlatePositron emission tomography (PET) imagingEmission Tomography ImagingDistribution volume ratioCerebellar reference regionNeocortical brain regionsSynaptic densityAD progressionConsistent pathologyPotential therapyMatter volumePromising biomarkerCognitive impairmentCN participantsBrain regionsDiseaseTomography imagingNormal participantsStructural correlatesSingle cell immune profiling of dengue virus patients reveals intact immune responses to Zika virus with enrichment of innate immune signatures
Zhao Y, Amodio M, Vander Wyk B, Gerritsen B, Kumar MM, van Dijk D, Moon K, Wang X, Malawista A, Richards MM, Cahill ME, Desai A, Sivadasan J, Venkataswamy MM, Ravi V, Fikrig E, Kumar P, Kleinstein SH, Krishnaswamy S, Montgomery RR. Single cell immune profiling of dengue virus patients reveals intact immune responses to Zika virus with enrichment of innate immune signatures. PLOS Neglected Tropical Diseases 2020, 14: e0008112. PMID: 32150565, PMCID: PMC7082063, DOI: 10.1371/journal.pntd.0008112.Peer-Reviewed Original ResearchConceptsZika virusCell subsetsDengue virusConcurrent dengue infectionInnate cell responsesInnate immune signaturesVirus-infected individualsDivergent clinical outcomesMosquito-borne human pathogenIntact immune responsePre-existing infectionInnate cell typesSingle-cell immune profilingPublic health importanceCell typesImmune signaturesVirus patientsWest Nile virusAcute patientsClinical outcomesImmune profilingDengue infectionImmune statusFunctional statusImmune cells