2018
Trends in 30-Day Readmission Rates for Medicare and Non-Medicare Patients in the Era of the Affordable Care Act
Angraal S, Khera R, Zhou S, Wang Y, Lin Z, Dharmarajan K, Desai NR, Bernheim SM, Drye EE, Nasir K, Horwitz LI, Krumholz HM. Trends in 30-Day Readmission Rates for Medicare and Non-Medicare Patients in the Era of the Affordable Care Act. The American Journal Of Medicine 2018, 131: 1324-1331.e14. PMID: 30016636, PMCID: PMC6380174, DOI: 10.1016/j.amjmed.2018.06.013.Peer-Reviewed Original ResearchConceptsHospital Readmissions Reduction ProgramReadmission ratesAcute myocardial infarctionHeart failurePatient groupMyocardial infarctionCause readmission rateNationwide Readmissions DatabaseReadmissions Reduction ProgramNon-Medicare patientsNon-target conditionsLower readmissionAffordable Care ActMedicare beneficiariesAge groupsPrivate insuranceCare ActPneumoniaInfarctionPatientsReduction programsMedicareGroupReadmissionFailureAssociation of the Hospital Readmissions Reduction Program With Mortality During and After Hospitalization for Acute Myocardial Infarction, Heart Failure, and Pneumonia
Khera R, Dharmarajan K, Wang Y, Lin Z, Bernheim SM, Wang Y, Normand ST, Krumholz HM. Association of the Hospital Readmissions Reduction Program With Mortality During and After Hospitalization for Acute Myocardial Infarction, Heart Failure, and Pneumonia. JAMA Network Open 2018, 1: e182777. PMID: 30646181, PMCID: PMC6324473, DOI: 10.1001/jamanetworkopen.2018.2777.Peer-Reviewed Original ResearchConceptsHospital Readmissions Reduction ProgramAcute myocardial infarctionPostdischarge mortalityHeart failureHRRP announcementReadmissions Reduction ProgramMedicare beneficiariesRisk-adjusted ratesMyocardial infarctionService Medicare beneficiariesReduction programsInterrupted time series frameworkHospital mortalityReduced readmissionsCohort studyPneumonia hospitalizationsReadmission ratesMAIN OUTCOMEPneumoniaMedicare dataHospitalizationHospitalMortalityReadmissionConcomitant harm
2017
Risk Trajectories of Readmission and Death in the First Year after Hospitalization for Chronic Obstructive Pulmonary Disease
Lindenauer PK, Dharmarajan K, Qin L, Lin Z, Gershon AS, Krumholz HM. Risk Trajectories of Readmission and Death in the First Year after Hospitalization for Chronic Obstructive Pulmonary Disease. American Journal Of Respiratory And Critical Care Medicine 2017, 197: 1009-1017. PMID: 29206052, PMCID: PMC5909167, DOI: 10.1164/rccm.201709-1852oc.Peer-Reviewed Original ResearchConceptsChronic obstructive pulmonary diseaseSame respective groupsObstructive pulmonary diseaseVentilator supportPulmonary diseaseRisk of readmissionRisk of hospitalizationGeneral elderly populationGeneral Medicare populationRisk of deathDaily riskRespective groupsReadmission ratesHospital readmissionAbsolute riskMedicare populationReadmissionElderly populationMedicare beneficiariesHospitalizationClinical servicesFirst monthProlonged riskDeathLongitudinal outcomesAge Differences in Hospital Mortality for Acute Myocardial Infarction: Implications for Hospital Profiling.
Dharmarajan K, McNamara RL, Wang Y, Masoudi FA, Ross JS, Spatz EE, Desai NR, de Lemos JA, Fonarow GC, Heidenreich PA, Bhatt DL, Bernheim SM, Slattery LE, Khan YM, Curtis JP. Age Differences in Hospital Mortality for Acute Myocardial Infarction: Implications for Hospital Profiling. Annals Of Internal Medicine 2017, 167: 555-564. PMID: 28973634, PMCID: PMC9359429, DOI: 10.7326/m16-2871.Peer-Reviewed Original ResearchConceptsRisk-standardized mortality ratesAcute myocardial infarctionOlder patientsYounger patientsMyocardial infarctionAge groupsHospital risk-standardized mortality ratesRetrospective cohort studyHospital mortality rankingsNational Quality ForumHospital mortalityMedian hospitalHospital outcomesCohort studyACTION RegistryAMI mortalityAmerican CollegeMedicare beneficiariesAMI hospitalizationPatientsMortality rateHospitalQuality ForumHospital ValueHospital profiling
2016
Association Between Hospital Penalty Status Under the Hospital Readmission Reduction Program and Readmission Rates for Target and Nontarget Conditions
Desai NR, Ross JS, Kwon JY, Herrin J, Dharmarajan K, Bernheim SM, Krumholz HM, Horwitz LI. Association Between Hospital Penalty Status Under the Hospital Readmission Reduction Program and Readmission Rates for Target and Nontarget Conditions. JAMA 2016, 316: 2647-2656. PMID: 28027367, PMCID: PMC5599851, DOI: 10.1001/jama.2016.18533.Peer-Reviewed Original ResearchConceptsHospital Readmissions Reduction ProgramAcute myocardial infarctionReadmission ratesReadmissions Reduction ProgramHeart failurePenalty statusNontarget conditionsMedicare feeMean readmission rateThirty-day riskRetrospective cohort studyUnplanned readmission rateReduction programsHRRP announcementHRRP implementationPenalized hospitalsCohort studyService patientsMyocardial infarctionMAIN OUTCOMEExcess readmissionsMedicare beneficiariesService beneficiariesHospitalPatients
2014
Trends in Hospitalizations Among Medicare Survivors of Aortic Valve Replacement in the United States From 1999 to 2010
Murugiah K, Wang Y, Dodson JA, Nuti SV, Dharmarajan K, Ranasinghe I, Cooper Z, Krumholz HM. Trends in Hospitalizations Among Medicare Survivors of Aortic Valve Replacement in the United States From 1999 to 2010. The Annals Of Thoracic Surgery 2014, 99: 509-517. PMID: 25527425, PMCID: PMC4454375, DOI: 10.1016/j.athoracsur.2014.08.045.Peer-Reviewed Original ResearchConceptsAortic valve replacementValve replacementHospitalization ratesAnnual Medicare paymentsPrincipal diagnosisOne-year hospitalization rateCommon principal diagnosisRisk of hospitalizationMean lengthGeneral Medicare populationMedicare paymentsPostoperative complicationsHeart failureBlack patientsMedicare patientsHospitalizationMedicare populationMedicare beneficiariesMortality ratePatientsStayCumulative daysCumulative lengthCertain subgroupsSurvivors
2013
National Trends in Heart Failure Hospitalization After Acute Myocardial Infarction for Medicare Beneficiaries
Chen J, Hsieh AF, Dharmarajan K, Masoudi FA, Krumholz HM. National Trends in Heart Failure Hospitalization After Acute Myocardial Infarction for Medicare Beneficiaries. Circulation 2013, 128: 2577-2584. PMID: 24190958, PMCID: PMC4415510, DOI: 10.1161/circulationaha.113.003668.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionHF hospitalizationHeart failureMyocardial infarctionMedicare beneficiariesManagement of AMIHeart failure hospitalizationSubsequent HF hospitalizationNumber of patientsNational trendsHigh-risk conditionsContemporary national trendsRelative annual increaseDemographic factorsFailure hospitalizationPerson yearsClinical comorbiditiesNational sampleComplete national sampleHospitalizationMedicare feeAMI hospitalizationService beneficiariesAnnual declineStudy periodNational Trends in Heart Failure Hospital Stay Rates, 2001 to 2009
Chen J, Dharmarajan K, Wang Y, Krumholz HM. National Trends in Heart Failure Hospital Stay Rates, 2001 to 2009. Journal Of The American College Of Cardiology 2013, 61: 1078-1088. PMID: 23473413, PMCID: PMC3939721, DOI: 10.1016/j.jacc.2012.11.057.Peer-Reviewed Original ResearchConceptsHospital stay ratesLength of stayHF hospital stayHospital mortalityYears of ageHospital stayPatients 18Stay ratesNational Inpatient Sample dataU.S. hospital dischargesPatients 65 yearsPrimary discharge diagnosisSignificant declineOlder Medicare beneficiariesNational Inpatient SampleBlack menLarge national datasetHospital dischargeOlder patientsPatients 55Younger patientsDischarge diagnosisInpatient SampleMedicare beneficiariesAge 65