2024
Hospital COVID-19 Burden and Adverse Event Rates
Metersky M, Rodrick D, Ho S, Galusha D, Timashenka A, Grace E, Marshall D, Eckenrode S, Krumholz H. Hospital COVID-19 Burden and Adverse Event Rates. JAMA Network Open 2024, 7: e2442936. PMID: 39495512, DOI: 10.1001/jamanetworkopen.2024.42936.Peer-Reviewed Original ResearchConceptsCOVID-19 burdenHospital admissionPatient safetyRelative riskCohort studyStudy of hospital admissionsAcute care hospitalsRisk-adjustment variablesRisk-adjusted ratesMedicare hospital admissionsCOVID-19 pandemicStaffing shortagesHospital characteristicsMain OutcomesHospital resilienceSurge capacityMedicare patientsCare hospitalHighest burdenPrevent declinesPatient admissionsStudy sampleElixhauser comorbiditiesCOVID-19Low burden
2023
Trends in the likelihood of receiving percutaneous coronary intervention in a low-volume hospital and disparities by sociodemographic communities
Wang C, Lindquist K, Krumholz H, Hsia R. Trends in the likelihood of receiving percutaneous coronary intervention in a low-volume hospital and disparities by sociodemographic communities. PLOS ONE 2023, 18: e0279905. PMID: 36652416, PMCID: PMC9847957, DOI: 10.1371/journal.pone.0279905.Peer-Reviewed Original ResearchConceptsLow-volume hospitalsNon-Latinx WhitesRelative riskSociodemographic groupsLow-income zip codesHospital PCI volumeRetrospective cohort studyPercutaneous coronary interventionCoronary artery diseaseLow-volume centersFavorable patient outcomesLow-volume facilitiesZip code median incomeLow incomeRace/ethnicityCohort studyCoronary interventionLatinx patientsSecondary outcomesArtery diseasePCI centerPrimary outcomePCI volumeAsian patientsCertain socioeconomic factors
2022
Study protocol for the Innovative Support for Patients with SARS-COV-2 Infections Registry (INSPIRE): A longitudinal study of the medium and long-term sequelae of SARS-CoV-2 infection
O’Laughlin K, Thompson M, Hota B, Gottlieb M, Plumb ID, Chang AM, Wisk LE, Hall AJ, Wang RC, Spatz ES, Stephens KA, Huebinger RM, McDonald SA, Venkatesh A, Gentile N, Slovis BH, Hill M, Saydah S, Idris AH, Rodriguez R, Krumholz HM, Elmore JG, Weinstein RA, Nichol G, . Study protocol for the Innovative Support for Patients with SARS-COV-2 Infections Registry (INSPIRE): A longitudinal study of the medium and long-term sequelae of SARS-CoV-2 infection. PLOS ONE 2022, 17: e0264260. PMID: 35239680, PMCID: PMC8893622, DOI: 10.1371/journal.pone.0264260.Peer-Reviewed Original ResearchConceptsSARS-CoV-2 infectionLong-term sequelaePatient-reported outcomesRelative riskAcute SARS-CoV-2 infectionSARS-CoV-2 negative participantsHealth system encountersPredictors of sequelaeHealth recordsInstitutional review board approvalLongitudinal studyDigital health recordsReview board approvalSARS-CoV-2Secure online platformClinical outcomesStudy protocolNegative participantsViral testsSimilar symptomatologyNew diagnosisBoard approvalSequelaeSelf-administered surveyInfection
2019
Noninferiority Designed Cardiovascular Trials in Highest-Impact Journals
Bikdeli B, Welsh JW, Akram Y, Punnanithinont N, Lee I, Desai NR, Kaul S, Stone G, Ross JS, Krumholz HM. Noninferiority Designed Cardiovascular Trials in Highest-Impact Journals. Circulation 2019, 140: 379-389. PMID: 31177811, PMCID: PMC8416048, DOI: 10.1161/circulationaha.119.040214.Peer-Reviewed Original ResearchConceptsNoninferiority marginNoninferiority trialCardiovascular trialsAllocation concealmentLower riskOpen labelHazard ratioRelative riskMethodological qualityProportion of trialsIndependent reviewersRisk differenceNew England JournalNoninferiorityHigh-impact journalsNew interventionsTrialsCohortDiscrepant resultsProtocol analysisTime trendsRiskTreatInterventionFactors
2018
Registration, results reporting, and publication bias of clinical trials supporting FDA approval of neuropsychiatric drugs before and after FDAAA: a retrospective cohort study
Zou CX, Becker JE, Phillips AT, Garritano JM, Krumholz HM, Miller JE, Ross JS. Registration, results reporting, and publication bias of clinical trials supporting FDA approval of neuropsychiatric drugs before and after FDAAA: a retrospective cohort study. Trials 2018, 19: 581. PMID: 30352601, PMCID: PMC6199729, DOI: 10.1186/s13063-018-2957-0.Peer-Reviewed Original ResearchConceptsRetrospective cohort studyPublication biasNeuropsychiatric indicationsCohort studyClinical trialsRelative riskEfficacy trialsFDA approvalPositive trialsFisher's exact testRecent FDA approvalDrug Administration Amendments ActClinical trial publicationsTRIAL REGISTRATIONMAIN OUTCOMEProportion of trialsNeuropsychiatric drugsNew drug approvalsTrial publicationsExact testMedical interventionsTrialsDrug approvalNew drugsDrugs
2015
Trajectories of risk after hospitalization for heart failure, acute myocardial infarction, or pneumonia: retrospective cohort study
Dharmarajan K, Hsieh AF, Kulkarni VT, Lin Z, Ross JS, Horwitz LI, Kim N, Suter LG, Lin H, Normand SL, Krumholz HM. Trajectories of risk after hospitalization for heart failure, acute myocardial infarction, or pneumonia: retrospective cohort study. The BMJ 2015, 350: h411. PMID: 25656852, PMCID: PMC4353309, DOI: 10.1136/bmj.h411.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionRetrospective cohort studyHeart failureRisk of deathMyocardial infarctionFirst readmissionAbsolute riskOlder patientsCohort studyRelative riskMedicare feeService beneficiariesRisk of readmissionGeneral elderly populationGeneral older populationRisk trajectoriesHigh-risk periodHospital dischargeHospital admissionDischarge diagnosisAdverse outcomesReadmissionHospitalizationTrajectories of riskElderly population
2013
HbA1c and Risk of Severe Hypoglycemia in Type 2 Diabetes
Lipska KJ, Warton EM, Huang ES, Moffet HH, Inzucchi SE, Krumholz HM, Karter AJ. HbA1c and Risk of Severe Hypoglycemia in Type 2 Diabetes. Diabetes Care 2013, 36: 3535-3542. PMID: 23900589, PMCID: PMC3816866, DOI: 10.2337/dc13-0610.Peer-Reviewed Original ResearchConceptsSevere hypoglycemiaType 2 diabetesRelative riskGlycemic controlSelf-reported severe hypoglycemiaType 2 diabetic patientsGlucose-lowering therapyPoor glycemic controlRate of hypoglycemiaPotential effect modifiersIntegrated healthcare systemYears of ageEligible survey respondentsPoisson regression modelsDiabetes durationDiabetes medicationsDiabetic patientsClinical variablesDiabetes StudyNormal glycemiaMain exposureEffect modifiersHypoglycemiaType 2Patients
2007
The Prognostic Importance of a Small Acute Decrement in Kidney Function in Hospitalized Patients: A Systematic Review and Meta-Analysis
Coca SG, Peixoto AJ, Garg AX, Krumholz HM, Parikh CR. The Prognostic Importance of a Small Acute Decrement in Kidney Function in Hospitalized Patients: A Systematic Review and Meta-Analysis. American Journal Of Kidney Diseases 2007, 50: 712-720. PMID: 17954284, DOI: 10.1053/j.ajkd.2007.07.018.Peer-Reviewed Original ResearchConceptsSerum creatinine levelsCreatinine levelsRelative riskTerm mortalityAcute changesWorse short-term outcomesClinical settingRR of deathAcute kidney injuryObservational cohort studyShort-term outcomesGreater relative riskPercentage of changeAcute decrementsKidney injuryCohort studyRenal functionHospitalized patientsKidney functionPrognostic importanceEmbase databasesWorse outcomesAcute decreaseStatistical heterogeneityAbstractTextAdverse Effects of Combination Angiotensin II Receptor Blockers Plus Angiotensin-Converting Enzyme Inhibitors for Left Ventricular Dysfunction: A Quantitative Review of Data From Randomized Clinical Trials
Phillips CO, Kashani A, Ko DK, Francis G, Krumholz HM. Adverse Effects of Combination Angiotensin II Receptor Blockers Plus Angiotensin-Converting Enzyme Inhibitors for Left Ventricular Dysfunction: A Quantitative Review of Data From Randomized Clinical Trials. JAMA Internal Medicine 2007, 167: 1930-1936. PMID: 17923591, DOI: 10.1001/archinte.167.18.1930.Peer-Reviewed Original ResearchConceptsAngiotensin II receptor blockersSymptomatic left ventricular dysfunctionLeft ventricular dysfunctionII receptor blockersVentricular dysfunctionAdverse effectsMedication discontinuationReceptor blockersSymptomatic hypotensionRenal functionACE inhibitorsClinical trialsRelative riskEnzyme inhibitorsAngiotensin converting enzyme (ACE) inhibitorsACE inhibitor therapyHealth clinical trialsChronic heart failureRandomized clinical trialsAcute myocardial infarctionConfidence intervalsRandom-effects modelSignificant increaseEligible RCTsHeart failure
2006
Recursive partitioning–based preoperative risk stratification for atrial fibrillation after coronary artery bypass surgery
Sedrakyan A, Zhang H, Treasure T, Krumholz HM. Recursive partitioning–based preoperative risk stratification for atrial fibrillation after coronary artery bypass surgery. American Heart Journal 2006, 151: 720-724. PMID: 16504639, DOI: 10.1016/j.ahj.2005.05.010.Peer-Reviewed Original ResearchConceptsCoronary artery bypass graft surgeryAtrial fibrillationLow-risk groupAggressive prophylaxisRelative riskPredictors of AFArtery bypass graft surgeryCoronary artery bypass surgeryRisk of AFYale-New Haven HospitalOnly ejection fractionPreoperative atrial fibrillationBypass graft surgeryArtery bypass surgeryCoronary artery diseasePreoperative risk stratificationHigh-risk groupHeart disease severityPossible adverse eventsOlder age subgroupsArrhythmia prophylaxisGraft surgeryProphylactic therapyAdverse eventsBypass surgeryRelation Between Hospital Specialization With Primary Percutaneous Coronary Intervention and Clinical Outcomes in ST-Segment Elevation Myocardial Infarction
Nallamothu BK, Wang Y, Magid DJ, McNamara RL, Herrin J, Bradley EH, Bates ER, Pollack CV, Krumholz HM. Relation Between Hospital Specialization With Primary Percutaneous Coronary Intervention and Clinical Outcomes in ST-Segment Elevation Myocardial Infarction. Circulation 2006, 113: 222-229. PMID: 16401769, DOI: 10.1161/circulationaha.105.578195.Peer-Reviewed Original ResearchConceptsST-segment elevation myocardial infarctionElevation myocardial infarctionHospital mortalityBalloon timePPCI volumeFibrinolytic therapyClinical outcomesMyocardial infarctionPrimary percutaneous coronary intervention capabilityPercutaneous coronary intervention capabilityPrimary percutaneous coronary interventionHierarchical multivariable regressionMyocardial infarction 4Hospital-level factorsPercutaneous coronary interventionHospital specializationSTEMI patientsCoronary interventionHighest quartileShorter doorHospital characteristicsNational registryLowest quartileRelative riskMultivariable regression
2001
Moderate Alcohol Consumption and Risk of Heart Failure Among Older Persons
Abramson JL, Williams SA, Krumholz HM, Vaccarino V. Moderate Alcohol Consumption and Risk of Heart Failure Among Older Persons. JAMA 2001, 285: 1971-1977. PMID: 11308433, DOI: 10.1001/jama.285.15.1971.Peer-Reviewed Original ResearchConceptsModerate alcohol consumptionHeart failureHeart failure ratesMyocardial infarctionAlcohol consumptionOlder personsNonfatal heart failure eventsHistory of MIHeart failure eventsProspective cohort studyHeart failure riskBody mass indexPopulation-based sampleCohort studyCurrent smokingMass indexMI riskPulse pressureFailure rateRelative riskAmount of alcoholMAIN OUTCOMELower riskElderly personsBaseline
1997
Functional Disability Before Myocardial Infarction in the Elderly as a Determinant of Infarction Severity and Postinfarction Mortality
Vaccarino V, Berkman LF, Mendes de Leon CF, Seeman TE, Horwitz RI, Krumholz HM. Functional Disability Before Myocardial Infarction in the Elderly as a Determinant of Infarction Severity and Postinfarction Mortality. JAMA Internal Medicine 1997, 157: 2196-2204. PMID: 9342996, DOI: 10.1001/archinte.1997.00440400046006.Peer-Reviewed Original ResearchConceptsMyocardial infarctionClinical severityFunctional disabilityElderly patientsDaily livingHigh mortalityAcute myocardial infarctionHigher clinical severityMore comorbiditiesPostinfarction mortalityHospital arrivalMI severityInfarction severityHospital treatmentHigh comorbidityRelative riskOutcome measuresCommon conditionPatientsTreatment interventionsMortalityOlder ageSeverity characteristicsSeverityConfidence intervals
1996
Sex Differences in Survival After Myocardial Infarction in Older Adults: A Community‐Based Approach
Vaccarino V, Krumholz H, de Leon C, Holford T, Seeman T, Horwitz R, Berkman L. Sex Differences in Survival After Myocardial Infarction in Older Adults: A Community‐Based Approach. Journal Of The American Geriatrics Society 1996, 44: 1174-1182. PMID: 8855995, DOI: 10.1111/j.1532-5415.1996.tb01366.x.Peer-Reviewed Original ResearchConceptsMyocardial infarctionMultivariable adjustmentClinical severityRelative riskPsychosocial factorsOlder individualsProspective cohort studyMain outcome measuresDemographic factorsSex differencesHospital complicationsCause mortalityLate mortalityClinical characteristicsCohort studyCT cohortHospital admissionOverall mortalityEarly mortalityElderly ProgramMean agePhysical functionFunctional statusMedical recordsOutcome measures