2017
Hospital-Readmission Risk — Isolating Hospital Effects from Patient Effects
Krumholz HM, Wang K, Lin Z, Dharmarajan K, Horwitz LI, Ross JS, Drye EE, Bernheim SM, Normand ST. Hospital-Readmission Risk — Isolating Hospital Effects from Patient Effects. New England Journal Of Medicine 2017, 377: 1055-1064. PMID: 28902587, PMCID: PMC5671772, DOI: 10.1056/nejmsa1702321.Peer-Reviewed Original ResearchConceptsRisk-standardized readmission ratesReadmission ratesObserved readmission ratesSimilar diagnosesHospital effectsDifferent hospitalsHospital readmission performanceRate of readmissionHospital readmission ratesLower readmission ratesStudy sampleYears of ageSignificant differencesMultiple admissionsReadmission outcomesOnly significant differencePatient effectsSame patientMedicare recipientsPatientsReadmission performanceRisk-standardized hospital readmission ratesHospitalHospital qualityQuartile
2016
Practice‐Level Variation in Outpatient Cardiac Care and Association With Outcomes
Clough JD, Rajkumar R, Crim MT, Ott LS, Desai NR, Conway PH, Maresh S, Kahvecioglu DC, Krumholz HM. Practice‐Level Variation in Outpatient Cardiac Care and Association With Outcomes. Journal Of The American Heart Association 2016, 5: e002594. PMID: 26908402, PMCID: PMC4802452, DOI: 10.1161/jaha.115.002594.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overAmbulatory CareCardiologyFemaleHealth Care CostsHealthcare DisparitiesHeart DiseasesHospitalizationHumansMaleMedicareMiddle AgedOffice VisitsPractice Patterns, Physicians'Process Assessment, Health CareQuality Indicators, Health CareTime FactorsTreatment OutcomeUnited StatesConceptsOutpatient cardiac careCardiac careCardiac servicesPractice-level variationMyocardial perfusion imagingNoncardiac hospitalizationsMedical hospitalizationCardiac catheterizationOffice visitsClinical endpointsOutpatient careLowest quartileOdds ratioCardiology practiceMedicare populationMedicare beneficiariesHospitalizationPerfusion imagingDevice proceduresEfficient carePhysician practicesQuartileCarePractice levelMean payment
2014
Hospital Variation in Noninvasive Positive Pressure Ventilation for Acute Decompensated Heart Failure
Kulkarni VT, Kim N, Dai Y, Dharmarajan K, Safavi KC, Bikdeli B, Lindenauer PK, Testani J, Dries DL, Krumholz HM. Hospital Variation in Noninvasive Positive Pressure Ventilation for Acute Decompensated Heart Failure. Circulation Heart Failure 2014, 7: 427-433. PMID: 24633829, PMCID: PMC4386575, DOI: 10.1161/circheartfailure.113.000698.Peer-Reviewed Original ResearchConceptsAcute decompensated heart failureNoninvasive positive pressure ventilationDecompensated heart failureRisk-standardized mortality ratesPositive pressure ventilationHeart failureIntubation rateMortality ratePressure ventilationUse of NPPVHospital risk-standardized mortality ratesHigher intubation rateHospital practice patternsHospital-level outcomesCross-sectional studyHierarchical logistic regression modelsLogistic regression modelsNIPPV useHospital variationSuch hospitalizationsPractice patternsHospitalizationHospitalQuartileBottom quartile
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 modelsTreatmentSurgeryAdmissionQuartile
2005
Impact of Managed Care on Cancer Trial Enrollment
Gross CP, Krumholz HM. Impact of Managed Care on Cancer Trial Enrollment. Journal Of Clinical Oncology 2005, 23: 3811-3818. PMID: 15923575, DOI: 10.1200/jco.2005.00.430.Peer-Reviewed Original ResearchConceptsTrial enrollment ratesCancer trial enrollmentTrial enrollmentCare penetrationCooperative group trialsLow enrollment ratesNational Cancer InstituteCounty characteristicsFourth quartileTrial participationLowest quartileProstate cancerCare competitionGroup trialsCancer InstituteStrong inverse correlationBivariate analysisCare activitiesMultivariate modelParticipant dataInverse correlationEnrollment ratesManaged CareZip codesQuartile