2021
Integration of Regional Hospitalizations, Registry and Vital Statistics Data for Development of a Single Statewide Ischemic Stroke Database
Yan Z, Nielsen V, Song G, Christie A, Schwamm L, Zachrison K. Integration of Regional Hospitalizations, Registry and Vital Statistics Data for Development of a Single Statewide Ischemic Stroke Database. Journal Of Stroke And Cerebrovascular Diseases 2021, 31: 106236. PMID: 34954597, DOI: 10.1016/j.jstrokecerebrovasdis.2021.106236.Peer-Reviewed Original ResearchConceptsStroke databaseDetailed clinical variablesPopulation-based studyLong-term outcomesIndirect identifiersVital statistics databaseHospitalization registryStroke admissionsHospitalization databaseVital statistics dataTerm outcomesVital statusClinical variablesLarge-scale outcome researchClinical registryHospitalization recordsPatient variablesAdministrative databasesClinical dataRich clinical dataRegistryHospitalizationDeterministic linkageCumulative mortalityVital records
2013
Variable Selection and Prediction Using a Nested, Matched Case-Control Study: Application to Hospital Acquired Pneumonia in Stroke Patients
Qian J, Payabvash S, Kemmling A, Lev MH, Schwamm LH, Betensky RA. Variable Selection and Prediction Using a Nested, Matched Case-Control Study: Application to Hospital Acquired Pneumonia in Stroke Patients. Biometrics 2013, 70: 153-163. PMID: 24320930, PMCID: PMC3954429, DOI: 10.1111/biom.12113.Peer-Reviewed Original ResearchConceptsMassachusetts General HospitalCase-control studyStroke patientsAcute ischemic stroke patientsBrain regionsMatched Case-Control StudyHospital-Acquired PneumoniaIschemic stroke patientsLarge prospective studiesUnconditional logistic regressionCase-control designSpecific brain regionsAcquired PneumoniaAcute infarctionClinical featuresProspective studyClinical variablesGeneral HospitalEpidemiologic studiesPatientsModern imagingLarger studyLogistic regressionAppropriate statistical analysisHAP studiesRelationship between sex, ejection fraction, and B-type natriuretic peptide levels in patients hospitalized with heart failure and associations with inhospital outcomes: Findings from the Get With The Guideline–Heart Failure Registry
Hsich E, Grau-Sepulveda M, Hernandez A, Eapen Z, Xian Y, Schwamm L, Bhatt D, Fonarow G. Relationship between sex, ejection fraction, and B-type natriuretic peptide levels in patients hospitalized with heart failure and associations with inhospital outcomes: Findings from the Get With The Guideline–Heart Failure Registry. American Heart Journal 2013, 166: 1063-1071.e3. PMID: 24268222, DOI: 10.1016/j.ahj.2013.08.029.Peer-Reviewed Original ResearchConceptsB-type natriuretic peptide levelsMedian BNP levelNatriuretic peptide levelsEjection fractionInhospital mortalityHeart failureBNP levelsHF patientsPeptide levelsPlasma B-type natriuretic peptide (BNP) levelsGuidelines-Heart Failure registryGuidelines-Heart FailurePrimary end pointInhospital outcomesBNP valuesHospital clusteringPrognostic significanceClinical variablesLarge registriesOdds ratioPatientsBNPHigh mortalityEnd pointMortalityHospital Acquired Pneumonia Is Linked to Right Hemispheric Peri-Insular Stroke
Kemmling A, Lev MH, Payabvash S, Betensky RA, Qian J, Masrur S, Schwamm LH. Hospital Acquired Pneumonia Is Linked to Right Hemispheric Peri-Insular Stroke. PLOS ONE 2013, 8: e71141. PMID: 23951094, PMCID: PMC3737185, DOI: 10.1371/journal.pone.0071141.Peer-Reviewed Original ResearchConceptsHemispheric infarctsBrain regionsConsecutive acute stroke patientsConditional logistic regression modelsHospital-Acquired PneumoniaRight hemispheric infarctAcute stroke patientsInsular cortex volumeVolume-based variablesSpecific brain regionsLogistic regression modelsAcquired PneumoniaControl patientsMajor complicationsBrainstem strokeImmune suppressionInfarct sizeStroke patientsAutonomic modulationClinical variablesAdmission imagingInfarct locationUnivariate analysisImmune mechanismsCortex volume
2011
Predictors of Hospital Length of Stay in Heart Failure: Findings from Get With the Guidelines
Whellan D, Zhao X, Hernandez A, Liang L, Peterson E, Bhatt D, Heidenreich P, Schwamm L, Fonarow G. Predictors of Hospital Length of Stay in Heart Failure: Findings from Get With the Guidelines. Journal Of Cardiac Failure 2011, 17: 649-656. PMID: 21807326, DOI: 10.1016/j.cardfail.2011.04.005.Peer-Reviewed Original ResearchConceptsStandard laboratory evaluationBrain natriuretic peptideHospital characteristicsPatient characteristicsMore comorbiditiesHospital lengthLonger LOSGuidelines-Heart FailureAdmission vital signsHeart failure patientsTime of admissionBNP levelsHF patientsFailure patientsHeart failureNatriuretic peptideClinical variablesPatient admissionsPatientsDisease severityVital signsHigher disease severityAdmissionLOS variationAdmission predictors