2024
Factors Associated with Long COVID Recovery among US Adults
Shah K, Shah R, Sawano M, Wu Y, Bishop P, Iwasaki A, Krumholz H. Factors Associated with Long COVID Recovery among US Adults. The American Journal Of Medicine 2024, 137: 896-899. PMID: 38649004, DOI: 10.1016/j.amjmed.2024.04.017.Peer-Reviewed Original ResearchUS adultsNational Health Interview SurveyNon-institutionalized US adultsLong COVIDFactors associated with Long COVIDReport recoveryHealth Interview SurveyNationally representative estimatesMultivariate logistic regression modelHigh school degreeLogistic regression modelsCOVID-19 symptomsCross-sectional sampleMultivariate logistic regression analysisNational survey dataHispanic adultsLogistic regression analysisInterview SurveyWhite adultsRepresentative estimatesAmerican adultsStudy sampleSchool degreeNonresponse biasRegression models
2023
Quantifying Blood Pressure Visit-to-Visit Variability in the Real-World Setting: A Retrospective Cohort Study
Lu Y, Linderman G, Mahajan S, Liu Y, Huang C, Khera R, Mortazavi B, Spatz E, Krumholz H. Quantifying Blood Pressure Visit-to-Visit Variability in the Real-World Setting: A Retrospective Cohort Study. Circulation Cardiovascular Quality And Outcomes 2023, 16: e009258. PMID: 36883456, DOI: 10.1161/circoutcomes.122.009258.Peer-Reviewed Original ResearchConceptsRetrospective cohort studyBlood pressure valuesPatient characteristicsReal-world settingCohort studyPatient subgroupsYale New Haven Health SystemMean body mass indexSystolic blood pressure valuesBlood pressure visitHistory of hypertensionCoronary artery diseaseManagement of patientsMultivariable linear regression modelsBlood pressure readingsBody mass indexPatient-level measuresBlood pressure variationAbsolute standardized differencesNon-Hispanic whitesAntihypertensive medicationsReal-world practiceVisit variabilityArtery diseaseRegression models
2021
Toward Dynamic Risk Prediction of Outcomes After Coronary Artery Bypass Graft
Mori M, Durant TJS, Huang C, Mortazavi BJ, Coppi A, Jean RA, Geirsson A, Schulz WL, Krumholz HM. Toward Dynamic Risk Prediction of Outcomes After Coronary Artery Bypass Graft. Circulation Cardiovascular Quality And Outcomes 2021, 14: e007363. PMID: 34078100, PMCID: PMC8635167, DOI: 10.1161/circoutcomes.120.007363.Peer-Reviewed Original ResearchConceptsCoronary artery bypass graftArtery bypass graftIntraoperative variablesBypass graftLogistic regression modelsOperative mortalityC-statisticCoronary artery bypass graft casesThoracic Surgeons Adult Cardiac Surgery DatabaseAdult Cardiac Surgery DatabaseMean patient ageGood c-statisticCardiac Surgery DatabaseBrier scoreRisk restratificationDynamic risk predictionIntraoperative deathsPostoperative complicationsPostoperative eventsAdverse eventsPatient agePreoperative variablesRegression modelsGraft casesSurgery DatabaseAssociation of Graduate Medical Education With Hospital Performance and Patient Outcomes
Zinoviev R, Krumholz HM, Pirruccio K, Forman H. Association of Graduate Medical Education With Hospital Performance and Patient Outcomes. JAMA Network Open 2021, 4: e2034196. PMID: 33507257, PMCID: PMC7844596, DOI: 10.1001/jamanetworkopen.2020.34196.Peer-Reviewed Original ResearchConceptsResident academic performanceFinancial standingGME fundingFinancial scoresFinancial performance scoreHospital's financial standingFunding dataHospital financial dataHospital performanceFinancial dataEconomic evaluationAnnual subsidyEducation fundingHospital operationsMedical education fundingHospital Compare databaseSubsidiesRegression modelsFundingLinear regression modelsCostRecipient hospitalModelBoard certification examinationStanding
2012
Skilled Nursing Facility Referral and Hospital Readmission Rates after Heart Failure or Myocardial Infarction
Chen J, Ross JS, Carlson MD, Lin Z, Normand SL, Bernheim SM, Drye EE, Ling SM, Han LF, Rapp MT, Krumholz HM. Skilled Nursing Facility Referral and Hospital Readmission Rates after Heart Failure or Myocardial Infarction. The American Journal Of Medicine 2012, 125: 100.e1-100.e9. PMID: 22195535, PMCID: PMC3246370, DOI: 10.1016/j.amjmed.2011.06.011.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionRisk-standardized readmission ratesSkilled nursing facilitiesHeart failureHospital-level variationReadmission ratesMyocardial infarctionRate of dischargeHospital-level readmission ratesSubstantial hospital-level variationService Medicare patientsCause readmission rateRisk of readmissionHospital readmission ratesHF admissionsRegression modelsAMI patientsFacility referralPrincipal diagnosisMedicare patientsMedicare claimsClaims dataAMI admissionsAMI hospitalizationNursing facilities
2009
Mortality and Readmission for Patients With Heart Failure Among U.S. News & World Report’s Top Heart Hospitals
Mulvey GK, Wang Y, Lin Z, Wang OJ, Chen J, Keenan PS, Drye EE, Rathore SS, Normand SL, Krumholz HM. Mortality and Readmission for Patients With Heart Failure Among U.S. News & World Report’s Top Heart Hospitals. Circulation Cardiovascular Quality And Outcomes 2009, 2: 558-565. PMID: 20031893, DOI: 10.1161/circoutcomes.108.826784.Peer-Reviewed Original ResearchConceptsRisk-standardized mortality ratesRisk-standardized readmission ratesReadmission ratesHeart failureMortality rateBest HospitalsAmerica's Best HospitalsMedical administrative dataReadmission analysisHeart HospitalHeart surgeryCardiac conditionsPatientsHospitalMortality analysisReadmissionAdministrative dataHierarchical regression modelsWorld ReportRegression modelsFailureReportSurgeryMortalityRate
2008
The Relationship Between Anemia, Change in Hematocrit Over Time and Change in Health Status in Patients With Heart Failure After Myocardial Infarction
Kosiborod M, Krumholz HM, Jones PG, Pitt B, Spertus JA. The Relationship Between Anemia, Change in Hematocrit Over Time and Change in Health Status in Patients With Heart Failure After Myocardial Infarction. Journal Of Cardiac Failure 2008, 14: 27-34. PMID: 18226770, DOI: 10.1016/j.cardfail.2007.09.009.Peer-Reviewed Original ResearchMeSH KeywordsAgedAnemiaCohort StudiesFemaleHealth Status IndicatorsHeart FailureHeart Function TestsHematocritHumansLinear ModelsMaleMiddle AgedMultivariate AnalysisMyocardial InfarctionProbabilityPrognosisQuality of LifeRisk AssessmentSickness Impact ProfileSurveys and QuestionnairesSurvival AnalysisTime FactorsConceptsKansas City Cardiomyopathy QuestionnaireHeart failureHealth status gainsHealth statusBaseline hematocritInitial hematocritMyocardial infarctionPatient’s initial hematocritPotential therapeutic targetHealth status assessmentMultivariable adjustmentAnemic patientsSevere anemiaSerial hematocritsHematocrit levelsPatientsTherapeutic targetHematocrit changesHematocritAnemiaInfarctionLinear regression modelsMonthsRegression modelsSignificant changes
2007
“America's Best Hospitals” in the Treatment of Acute Myocardial Infarction
Wang OJ, Wang Y, Lichtman JH, Bradley EH, Normand SL, Krumholz HM. “America's Best Hospitals” in the Treatment of Acute Myocardial Infarction. JAMA Internal Medicine 2007, 167: 1345-1351. PMID: 17620526, DOI: 10.1001/archinte.167.13.1345.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionStandardized mortality ratioBest HospitalsMyocardial infarctionAmerica's Best HospitalsTreatment of AMIMedicare administrative dataHeart surgeryMortality ratioLower riskMortality rateHospitalQuartile distributionPatientsRSMRInfarctionAdministrative dataOne-thirdHierarchical regression modelsRSMRsRegression modelsTreatmentSurgeryAdmissionQuartileOpening of Specialty Cardiac Hospitals and Use of Coronary Revascularization in Medicare Beneficiaries
Nallamothu BK, Rogers MA, Chernew ME, Krumholz HM, Eagle KA, Birkmeyer JD. Opening of Specialty Cardiac Hospitals and Use of Coronary Revascularization in Medicare Beneficiaries. JAMA 2007, 297: 962-968. PMID: 17341710, DOI: 10.1001/jama.297.9.962.Peer-Reviewed Original ResearchMeSH KeywordsAgedAngioplasty, Balloon, CoronaryCardiac Care FacilitiesCardiology Service, HospitalCatchment Area, HealthCoronary Artery BypassHealth Care SurveysHealth Services Needs and DemandHospitals, GeneralHumansLinear ModelsMedicareMyocardial RevascularizationPractice Patterns, Physicians'Program DevelopmentReimbursement, IncentiveUnited StatesUtilization ReviewConceptsHospital referral regionsPopulation-based ratesSpecialty cardiac hospitalsCardiac hospitalTotal revascularizationCoronary revascularizationGeneral HospitalMedicare beneficiariesCardiac programAnnual population-based ratesAcute myocardial infarctionCost-efficient careMyocardial infarctionAdjusted ratesRevascularizationReferral regionsProcedure utilizationHospitalCABGPCIPatientsLinear regression modelsRegression modelsRelative increaseHealth care market
1999
Variations in and correlates of length of stay in academic hospitals among patients with heart failure resulting from systolic dysfunction.
Krumholz HM, Chen YT, Bradford WD, Cerese J. Variations in and correlates of length of stay in academic hospitals among patients with heart failure resulting from systolic dysfunction. The American Journal Of Managed Care 1999, 5: 715-23. PMID: 10538451.Peer-Reviewed Original ResearchConceptsLength of stayCongestive heart failureHeart failureSystolic dysfunctionPatient characteristicsAcademic hospitalCollaborative quality improvement projectIndividual hospitalsAdmission clinical characteristicsRetrospective cohort studyPrincipal discharge diagnosisNumber of patientsQuality improvement projectUniversity HealthSystem ConsortiumCorrelates of lengthHospital stayPeripheral edemaClinical characteristicsCohort studyRenal failureClinical factorsMajor complicationsHospital eventsRegression modelsAtrial fibrillation