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 ResearchMeSH KeywordsAgedAged, 80 and overCohort StudiesDementiaFemaleFrailtyHumansLongitudinal StudiesMaleMedicare Part CPatient ReadmissionProspective StudiesUnited StatesConceptsCenters 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
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 ResearchMeSH KeywordsBiometryComputer SimulationHumansLongitudinal StudiesModels, StatisticalResearch DesignSoftwareConceptsImputation 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 imputation
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
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 ResearchMeSH KeywordsAgedAged, 80 and overChronic DiseaseFemaleHospitalizationHumansLongitudinal StudiesMaleMultimorbidityProbabilitySkilled Nursing FacilitiesUnited StatesConceptsSkilled 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 Study
2019
Sociodemographic Factors and Characteristics of Caregivers as Determinants of Skilled Nursing Facility Admissions When Modeled Jointly With Functional Limitations
Jørgensen TSH, Allore H, MacNeil Vroomen JL, Wyk BV, Agogo GO. Sociodemographic Factors and Characteristics of Caregivers as Determinants of Skilled Nursing Facility Admissions When Modeled Jointly With Functional Limitations. Journal Of The American Medical Directors Association 2019, 20: 1599-1604.e4. PMID: 30902676, PMCID: PMC7444598, DOI: 10.1016/j.jamda.2019.01.154.Peer-Reviewed Original ResearchConceptsSkilled nursing facility admissionsNursing facility admissionsSNF admissionCharacteristics of caregiversFunctional limitationsSociodemographic factorsCaregiver characteristicsPartner caregiversFacility admissionHigh-risk populationImpact of caregiversNon-Hispanic whitesAging Trends StudyRace/ethnicityNational HealthStudy populationAdmissionLongitudinal changesMedicaid ServicesOlder adultsFuture interventionsEffect estimatesCaregiversLower hazardOlder Americans