2024
Racial/Ethnic Disparities in Aortic Valve Replacement Among Medicare Beneficiaries in the United States, 2012-2019
Gupta A, Mori M, Wang Y, Pawar S, Vahl T, Nazif T, Onuma O, Yong C, Sharma R, Kirtane A, Forrest J, George I, Kodali S, Chikwe J, Geirsson A, Makkar R, Leon M, Krumholz H. Racial/Ethnic Disparities in Aortic Valve Replacement Among Medicare Beneficiaries in the United States, 2012-2019. The American Journal Of Medicine 2024, 137: 321-330.e7. PMID: 38190959, PMCID: PMC11019903, DOI: 10.1016/j.amjmed.2023.12.026.Peer-Reviewed Original ResearchAortic valve replacementRace/ethnicityValve replacementAortic stenosisWhite patientsMedicare beneficiariesSurgical aortic valve replacement (SAVR) proceduresCross-sectional cohort studyAortic valve replacement proceduresAortic stenosis treatmentRacial/Ethnic DisparitiesValve replacement proceduresSelf-reported race/ethnicityRace-related differencesIndex admissionIndex hospitalizationCohort studyAsian patientsPrincipal diagnosisProcedural outcomesStenosis treatmentCare spectrumPatientsEthnic disparitiesStenosis
2022
Analysis of Hospital-Level Readmission Rates and Variation in Adverse Events Among Patients With Pneumonia in the United States
Wang Y, Eldridge N, Metersky ML, Rodrick D, Faniel C, Eckenrode S, Mathew J, Galusha DH, Tasimi A, Ho SY, Jaser L, Peterson A, Normand ST, Krumholz HM. Analysis of Hospital-Level Readmission Rates and Variation in Adverse Events Among Patients With Pneumonia in the United States. JAMA Network Open 2022, 5: e2214586. PMID: 35639379, PMCID: PMC9157270, DOI: 10.1001/jamanetworkopen.2022.14586.Peer-Reviewed Original ResearchConceptsRisk-standardized readmission ratesMedicare Patient Safety Monitoring SystemCause readmission rateAdverse eventsReadmission ratesHigh riskHospital-level readmission ratesHigher patient riskHospital adverse eventsAdverse event dataCross-sectional studyHospital performanceIndex hospitalizationMedian ageHospital characteristicsMedical recordsReadmission dataPatient riskHospital careMAIN OUTCOMEPneumoniaHospital levelPatientsReadmissionGreater risk
2019
Association of Hospital Payment Profiles With Variation in 30-Day Medicare Cost for Inpatients With Heart Failure or Pneumonia
Krumholz HM, Wang Y, Wang K, Lin Z, Bernheim SM, Xu X, Desai NR, Normand ST. Association of Hospital Payment Profiles With Variation in 30-Day Medicare Cost for Inpatients With Heart Failure or Pneumonia. JAMA Network Open 2019, 2: e1915604. PMID: 31730185, PMCID: PMC6902811, DOI: 10.1001/jamanetworkopen.2019.15604.Peer-Reviewed Original ResearchConceptsHeart failureSame patientSame diagnosisMortality rateRisk-standardized mortality ratesHighest quartile hospitalsObservational cohort studyMedian hospitalQuartile hospitalsIndex hospitalizationCohort studyCritical access hospitalsPatient characteristicsHospital variationAcute careEpisode paymentsPrincipal diagnosisMAIN OUTCOMEMedicare feePneumoniaMedicare beneficiariesPatientsCase mixService Part ADifferent hospitalsThirty-Day Hospital Readmission After Acute Myocardial Infarction in China
Li J, Dharmarajan K, Bai X, Masoudi FA, Spertus JA, Li X, Zheng X, Zhang H, Yan X, Dreyer RP, Krumholz HM, Group F. Thirty-Day Hospital Readmission After Acute Myocardial Infarction in China. Circulation Cardiovascular Quality And Outcomes 2019, 12: e005628. PMID: 31092023, DOI: 10.1161/circoutcomes.119.005628.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionUnplanned cardiovascular readmissionsDays of dischargeMyocardial infarctionCardiovascular readmissionCause readmissionMost readmissionsLower riskFit Cox proportional hazards modelsST-segment elevation myocardial infarctionAcute Coronary Events (GRACE) scoreThirty-day hospital readmissionsDisease-specific health statusCox proportional hazards modelVentricular ejection fractionProportional hazards modelLow social supportBackground ReadmissionRecurrent anginaCardiovascular eventsHospital complicationsUnplanned readmissionIndex hospitalizationClinical factorsConsecutive patients
2018
Time to hospital arrival among patients with acute myocardial infarction in China: a report from China PEACE prospective study
Guan W, Venkatesh AK, Bai X, Xuan S, Li J, Li X, Zhang H, Zheng X, Masoudi FA, Spertus JA, Krumholz HM, Jiang L. Time to hospital arrival among patients with acute myocardial infarction in China: a report from China PEACE prospective study. European Heart Journal - Quality Of Care And Clinical Outcomes 2018, 5: 63-71. PMID: 29878087, PMCID: PMC6307335, DOI: 10.1093/ehjqcco/qcy022.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionHospital arrivalSymptom onsetMyocardial infarctionMedical insuranceLower household incomeRural medical insuranceChest discomfortChest painIndex hospitalizationMedian timeMultivariable analysisAMI symptomsProspective studyAssociated FactorsPatients' perceptionsCare seekingAMI hospitalizationPatientsSymptomsHousehold incomeAMI studyHospitalizationInfarctionAverage time
2017
Hospital Readmissions among Commercially Insured and Medicare Advantage Beneficiaries with Diabetes and the Impact of Severe Hypoglycemic and Hyperglycemic Events
McCoy RG, Lipska KJ, Herrin J, Jeffery MM, Krumholz HM, Shah ND. Hospital Readmissions among Commercially Insured and Medicare Advantage Beneficiaries with Diabetes and the Impact of Severe Hypoglycemic and Hyperglycemic Events. Journal Of General Internal Medicine 2017, 32: 1097-1105. PMID: 28685482, PMCID: PMC5602759, DOI: 10.1007/s11606-017-4095-x.Peer-Reviewed Original ResearchConceptsDiabetes Complications Severity IndexSevere dysglycemiaIndex hospitalizationMedicare Advantage beneficiariesRisk factorsBetter care transitionsComplications Severity IndexPost-discharge managementIndependent risk factorYounger patient ageOptumLabs Data WarehouseStrong risk factorYears of ageBackgroundHospital readmissionsDesignRetrospective analysisCause readmissionUnplanned readmissionPatient agePrior hospitalizationReadmission ratesYounger patientsHeart failureHospital readmissionSevere hypoglycemiaDiabetes complications
2015
Effectiveness of implantable cardioverter-defibrillators in survivors of inhospital cardiac arrest
Chan PS, Krumholz HM, Spertus JA, Curtis LH, Li Y, Hammill BG, Nallamothu BK, investigators A. Effectiveness of implantable cardioverter-defibrillators in survivors of inhospital cardiac arrest. American Heart Journal 2015, 169: 870-878.e1. PMID: 26027626, PMCID: PMC4451609, DOI: 10.1016/j.ahj.2015.02.016.Peer-Reviewed Original ResearchConceptsInhospital cardiac arrestLong-term mortalityHospital cardiac arrestCardiac arrestICD treatmentLower long-term mortalityImplantable cardioverter-defibrillator therapyHigh illness acuityHigher unadjusted mortalityICD-treated patientsCardiac Arrest RegistryCardioverter-defibrillator therapyPulseless ventricular tachycardiaHigh-risk populationComparative effectiveness studiesLong-term survivalPropensity score analysisLower mortality rateArrest etiologyEligible survivorsICD trialsHospital deathICD therapyIndex hospitalizationUntreated patients
2011
An Administrative Claims Model for Profiling Hospital 30-Day Mortality Rates for Pneumonia Patients
Bratzler DW, Normand SL, Wang Y, O'Donnell WJ, Metersky M, Han LF, Rapp MT, Krumholz HM. An Administrative Claims Model for Profiling Hospital 30-Day Mortality Rates for Pneumonia Patients. PLOS ONE 2011, 6: e17401. PMID: 21532758, PMCID: PMC3075250, DOI: 10.1371/journal.pone.0017401.Peer-Reviewed Original ResearchConceptsMortality rateDerivation cohortValidation cohortModel derivation cohortAge 66 yearsPrincipal discharge diagnosisAdministrative diagnosis codesStandardized mortality rateRisk-adjustment variablesQuality of careState mortality ratesAdministrative Claims ModelClaims-based modelsIndex hospitalizationPatient demographicsDischarge diagnosisOutpatient encountersPneumonia mortalityPneumonia patientsRetrospective studyDiagnosis codesPneumonia casesMortality estimatesOutcome measuresProfiling Hospitals
2010
Is Same-Hospital Readmission Rate a Good Surrogate for All-Hospital Readmission Rate?
Nasir K, Lin Z, Bueno H, Normand SL, Drye EE, Keenan PS, Krumholz HM. Is Same-Hospital Readmission Rate a Good Surrogate for All-Hospital Readmission Rate? Medical Care 2010, 48: 477-481. PMID: 20393366, DOI: 10.1097/mlr.0b013e3181d5fb24.Peer-Reviewed Original ResearchConceptsRisk-standardized readmission ratesHospital readmission ratesSame-hospital readmissionsSame-hospital readmission ratesDays of dischargeReadmission ratesHeart failureUS acute care hospitalsThirty-day readmissionStandard Analytic FilesAcute care hospitalsHierarchical logistic regression modelsLogistic regression modelsCause readmissionHF readmissionIndex hospitalizationCare hospitalHospital readmissionAnalytic FilesMedicare inpatientReadmissionStudy populationHospital measuresReadmission measuresHospitalization
2009
Reduction in Acute Myocardial Infarction Mortality in the United States: Risk-Standardized Mortality Rates From 1995-2006
Krumholz HM, Wang Y, Chen J, Drye EE, Spertus JA, Ross JS, Curtis JP, Nallamothu BK, Lichtman JH, Havranek EP, Masoudi FA, Radford MJ, Han LF, Rapp MT, Straube BM, Normand SL. Reduction in Acute Myocardial Infarction Mortality in the United States: Risk-Standardized Mortality Rates From 1995-2006. JAMA 2009, 302: 767-773. PMID: 19690309, PMCID: PMC3349070, DOI: 10.1001/jama.2009.1178.Peer-Reviewed Original ResearchConceptsRisk-standardized mortality ratesAcute myocardial infarctionShort-term mortality rateMortality rateHospital variationNonfederal acute care hospitalsAcute myocardial infarction mortalityHospital mortality rateDay of admissionRisk standardized mortality ratesAcute care hospitalsMyocardial infarction mortalityHealth care professionalsIndex hospitalizationCare hospitalMyocardial infarctionNational averagePatient levelMedicare patientsObservational studyMedical adviceHospital varianceMAIN OUTCOMECare professionalsPatientsThe Association of Cognitive and Somatic Depressive Symptoms With Depression Recognition and Outcomes After Myocardial Infarction
Smolderen KG, Spertus JA, Reid KJ, Buchanan DM, Krumholz HM, Denollet J, Vaccarino V, Chan PS. The Association of Cognitive and Somatic Depressive Symptoms With Depression Recognition and Outcomes After Myocardial Infarction. Circulation Cardiovascular Quality And Outcomes 2009, 2: 328-337. PMID: 20031858, PMCID: PMC2779543, DOI: 10.1161/circoutcomes.109.868588.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionCognitive depressive symptomsSomatic depressive symptomsDepressive symptomsSomatic symptomsAMI patientsMyocardial infarctionCognitive symptomsUnadjusted Cox regression analysisPatient Health Questionnaire scoresDepression recognitionLong-term prognosisCox regression analysisLong-term outcomesRecognition of depressionAssociation of CognitiveCause mortalityCause rehospitalizationIndex hospitalizationMultivariable adjustmentAMI registrySymptom scoresClinical recognitionIndependent associationMedical records
2008
Angina at 1 Year After Myocardial Infarction: Prevalence and Associated Findings
Maddox TM, Reid KJ, Spertus JA, Mittleman M, Krumholz HM, Parashar S, Ho PM, Rumsfeld JS. Angina at 1 Year After Myocardial Infarction: Prevalence and Associated Findings. JAMA Internal Medicine 2008, 168: 1310-1316. PMID: 18574088, DOI: 10.1001/archinte.168.12.1310.Peer-Reviewed Original ResearchConceptsAngina 1 yearMyocardial infarctionDepressive symptomsPrior coronary artery bypass graft surgeryCoronary artery bypass graft surgeryArtery bypass graft surgeryRecurrent rest anginaBypass graft surgeryPatients 1 yearQuestionnaire 1 yearAcute myocardial infarctionMultivariate regression modelingGraft surgeryIndex hospitalizationRest anginaMulticenter cohortPersistent smokingAssociated findingMI presentationModifiable factorsClinical historyOutpatient treatmentAnginaInpatient treatmentPatients
2006
Prevalence and Predictors of Angina Pectoris One Month After Myocardial Infarction
Spertus JA, Dawson J, Masoudi FA, Krumholz HM, Reid KJ, Peterson ED, Rumsfeld JS, Consortium C. Prevalence and Predictors of Angina Pectoris One Month After Myocardial Infarction. The American Journal Of Cardiology 2006, 98: 282-288. PMID: 16860010, DOI: 10.1016/j.amjcard.2006.01.099.Peer-Reviewed Original ResearchConceptsAngina pectorisMyocardial infarctionCoronary artery bypass surgeryPrevious coronary artery bypassMultivariable logistic regression analysisPatient's myocardial infarctionCoronary artery bypassSeattle Angina QuestionnaireArtery bypass surgeryLogistic regression analysisQuality of lifeIndex admissionAngina QuestionnaireArtery bypassIndex hospitalizationBypass surgeryYounger patientsTreatable symptomsTreatment characteristicsPatientsOne monthAdditional treatmentMonthsInfarctionRegression analysis
2002
Cardiogenic shock complicating acute myocardial infarction in elderly patients: Does admission to a tertiary center improve survival?
Berger AK, Radford MJ, Krumholz HM. Cardiogenic shock complicating acute myocardial infarction in elderly patients: Does admission to a tertiary center improve survival? American Heart Journal 2002, 143: 768-776. PMID: 12040336, DOI: 10.1067/mhj.2002.122289.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionCardiogenic shockMyocardial infarctionRevascularization servicesCoronary revascularizationPrognosis of patientsCommunity-based cohortCooperative Cardiovascular Project databaseCardiovascular resourcesEarly revascularizationIndex hospitalizationClinical characteristicsElderly patientsCoronary angioplastyTertiary centerBetter prognosisRevascularization capabilityInvasive strategyClinical trialsTreatment strategiesSurgery facilitiesInfarctionPatientsHospitalEarly benefits
2000
Mental Disorders and Use of Cardiovascular Procedures After Myocardial Infarction
Druss BG, Bradford DW, Rosenheck RA, Radford MJ, Krumholz HM. Mental Disorders and Use of Cardiovascular Procedures After Myocardial Infarction. JAMA 2000, 283: 506-511. PMID: 10659877, DOI: 10.1001/jama.283.4.506.Peer-Reviewed Original ResearchMeSH KeywordsAgedAngioplasty, Balloon, CoronaryCardiac CatheterizationCohort StudiesComorbidityCoronary Artery BypassFemaleHumansLogistic ModelsMaleMental DisordersMultivariate AnalysisMyocardial InfarctionOutcome Assessment, Health CareRetrospective StudiesSocioeconomic FactorsSurvival AnalysisUnited StatesConceptsPercutaneous transluminal coronary angioplastyComorbid mental disordersAcute myocardial infarctionCardiac catheterizationMyocardial infarctionMental disordersProvider factorsCardiovascular proceduresRates of PTCACoronary artery bypass graft surgeryArtery bypass graft surgeryBypass graft surgeryPatients 65 yearsRetrospective cohort studyTransluminal coronary angioplastyLong-term outcomesCooperative Cardiovascular ProjectCoronary revascularization proceduresSex-based differencesGraft surgeryIndex hospitalizationCohort studyCoronary angioplastyMedical chartsRevascularization procedures
1997
Readmission After Hospitalization for Congestive Heart Failure Among Medicare Beneficiaries
Krumholz HM, Parent EM, Tu N, Vaccarino V, Wang Y, Radford MJ, Hennen J. Readmission After Hospitalization for Congestive Heart Failure Among Medicare Beneficiaries. JAMA Internal Medicine 1997, 157: 99-104. PMID: 8996046, DOI: 10.1001/archinte.1997.00440220103013.Peer-Reviewed Original ResearchConceptsCongestive heart failureHeart failureMedicare beneficiariesIndex admissionElderly patientsReadmission ratesCommon discharge diagnosesDeyo comorbidity scoreOutcomes of readmissionSingle-center studySpectrum of diagnosesLength of stayDeterminants of readmissionSignificant predictorsMedicare administrative filesComorbidity scoreIndex hospitalizationStudy patientsFiscal year 1991Prior admissionCommon diagnosisMultivariable analysisDischarge diagnosisMale sexAdverse outcomes