Elena Graetz, PhD
Senior Biostatistical AnalystCards
About
Titles
Senior Biostatistical Analyst
Education & Training
- PhD
- University of Illinois at Chicago, Statistics
- BSc
- University of Illinois at Chicago, Mathematics (2016)
- ND
- Freie Universitaet Berlin, Mathematics (2014)
Research
Publications
2025
Simultaneous Symmetrizing Surgery on the Contralateral Breast in Unilateral Autologous Breast Reconstruction Is Cost-Effective
Zhao K, Kammien A, Graetz E, Moore M, Evans B, Schneider E, Ayyala H. Simultaneous Symmetrizing Surgery on the Contralateral Breast in Unilateral Autologous Breast Reconstruction Is Cost-Effective. Journal Of Reconstructive Microsurgery 2025 PMID: 39821138, DOI: 10.1055/a-2517-0803.Peer-Reviewed Original ResearchFree flap reconstructionSymmetrization surgeryFlap reconstructionBreast reconstructionDelayed reconstructionPatient characteristicsSingle-stage breast reconstructionUnilateral autologous breast reconstructionAutologous breast reconstructionSurgical site infectionThirty-day complicationsContralateral breastUnilateral reconstructionImmediate reconstructionSite infectionWound dehiscenceThirty-dayIncreased complicationsNational administrative dataSurgeryRevision surgeryComplicationsPatientsWilcoxon testChi-squareCharacterization of trends in preoperative hemoglobin A1c testing prior to metabolic and bariatric surgery: a retrospective, observational study
Hamid S, Graetz E, Zolfaghari E, Schultz K, Schneider E, Gibbs K. Characterization of trends in preoperative hemoglobin A1c testing prior to metabolic and bariatric surgery: a retrospective, observational study. Perioperative Medicine 2025, 14: 3. PMID: 39789653, PMCID: PMC11720298, DOI: 10.1186/s13741-024-00483-8.Peer-Reviewed Original ResearchRobotic Roux-en-Y gastric bypassBariatric surgeryDiabetes statusSleeve gastrectomyA1c testingRoux-en-Y gastric bypassIncreased oddsPreoperative hemoglobin A1cDemographic characteristics of patientsCharacteristics of patientsNon-insulin-dependent diabetesInsulin-dependent patientsBaseline diabetes statusLogistic regression analysisSleep apneaCardiopulmonary comorbiditiesAmerican Society of MetabolicGastric bypassMBSAQIP databaseClinical factorsHemoglobin A1c testingMBS patientsSociety recommendationsHemoglobin A1cDependent patients
2024
Local Infrastructure and Economy Predicts Traffic Related Fatalities in Children
Hellmann Z, Graetz E, Rehman S, Moore M, Schneider E, Christison-Lagay E, Solomon D. Local Infrastructure and Economy Predicts Traffic Related Fatalities in Children. Journal Of Pediatric Surgery 2024, 162109. PMID: 39753412, DOI: 10.1016/j.jpedsurg.2024.162109.Peer-Reviewed Original ResearchMotor vehicle collisionsSocial Vulnerability IndexFatality Analysis Reporting SystemPoisson regressionRelated mortality rateMortality rateAverage annual mortality rateMultivariable Poisson regressionPoisson regression modelsTraffic fatalitiesArea deprivationWalking IndexUnivariate Poisson regressionAnnual mortality rateUS CensusDecile increaseMacroeconomic forcesPoor walkabilityState policy changesInclusion criteriaVehicle collisionsCrash-specific informationTraffic related fatalitiesRegression modelsWalkabilitySame Day Discharge after Metabolic and Bariatric Surgery in Adults 65 Years and Older: An Analysis of the 2015 to 2022 MBSAQIP
Hamid S, Graetz E, Esdaille C, Schneider E, Gibbs K. Same Day Discharge after Metabolic and Bariatric Surgery in Adults 65 Years and Older: An Analysis of the 2015 to 2022 MBSAQIP. Obesity Surgery 2024, 35: 25-32. PMID: 39636520, DOI: 10.1007/s11695-024-07611-9.Peer-Reviewed Original ResearchClavien-Dindo complicationsObesity-associated diseasesPostoperative dayBariatric surgeryPrimary sleeve gastrectomyDay dischargeInsulin-dependent diabetesSame-day dischargePOD1 dischargePostoperative morbiditySleeve gastrectomyPatient selectionSafety profileSafety of SDDPatientsSDD protocolCohort of older adultsPOD1Logistic regressionAge groupsSurgeryComplicationsMBSAQIPOlder adultsReadmissionAnalysis of Online Crowdfunding Among Patients Pursuing Metabolic and Bariatric Surgery in the United States
Hamid S, Graetz E, Bakkila B, Chao G, Zolfaghari E, Schultz K, Chetty A, Trabilsy M, Schneider E, Gibbs K. Analysis of Online Crowdfunding Among Patients Pursuing Metabolic and Bariatric Surgery in the United States. Obesity Surgery 2024, 35: 170-180. PMID: 39633092, DOI: 10.1007/s11695-024-07605-7.Peer-Reviewed Original ResearchBariatric surgeryNon-medical expensesRoux-en-Y gastric bypassNon-surgical attemptsRoux-en-YObesity-associated diseasesSleeve gastrectomyGastric bypassBiliopancreatic diversionDuodenal switchAssessed associationsLogistic regressionSurgeryIQRPatientsMedianDiseaseLost wagesHealth-related diseasesUnmet financial needsNational Patterns of Hospital Admission Versus Home Recovery Following Mastectomy for Breast Cancer
Kim L, Moore M, Schneider E, Canner J, Ayyala H, Chen J, Anant P, Graetz E, Lynch M, Zanieski G, Gillego A, Valero M, Proussaloglou E, Berger E, Golshan M, Greenup R, Park T. National Patterns of Hospital Admission Versus Home Recovery Following Mastectomy for Breast Cancer. Annals Of Surgical Oncology 2024, 31: 9088-9099. PMID: 39322830, DOI: 10.1245/s10434-024-16107-w.Peer-Reviewed Original ResearchHR patientsLymph nodesRate of neoadjuvant chemotherapyHospital admissionNational patterns of careEmergency departmentDecrease wound complicationsNeoadjuvant chemo-Hospital re-admissionNeoadjuvant chemotherapyIn-hospital admissionRate of reconstructionPerioperative outcomesPostoperative hematomaComplication ratePostoperative complicationsWound complicationsHome recoveryPatterns of careBreast cancerMastectomyEmergency room visitsMultivariate analysisComplicationsPatientsWeight Nadir and Long-Term Weight Outcomes After Laparoscopic Sleeve Gastrectomy in a Diverse Cohort of Adolescents and Young Adults
Hornick M, Chao G, Ying L, Nadzam G, Duffy A, Ghiassi S, Graetz E, Gibbs K, Morton J. Weight Nadir and Long-Term Weight Outcomes After Laparoscopic Sleeve Gastrectomy in a Diverse Cohort of Adolescents and Young Adults. Obesity Surgery 2024, 34: 2965-2973. PMID: 38935262, DOI: 10.1007/s11695-024-07374-3.Peer-Reviewed Original ResearchPreoperative weightSleeve gastrectomyWeight nadirWeight outcomesIntroductionLaparoscopic sleeve gastrectomyLaparoscopic sleeve gastrectomyGroup of patientsWeight loss strategiesYoung adultsDiverse group of patientsCohort of adolescentsLongitudinal weight dataBariatric proceduresFollow-upNon-Hispanic blacksLoss strategiesMedical recordsPatientsTWLLSGWeight dataWeight recurrenceDiverse cohortGastrectomyWeight changeA Cross-Sectional Analysis of Pediatric Necrotizing Soft Tissue Infection Cases and Racial Disparities From the 2016 to 2020 National Inpatient Sample
Hamid S, Graetz E, Schneider E, Gibbs K. A Cross-Sectional Analysis of Pediatric Necrotizing Soft Tissue Infection Cases and Racial Disparities From the 2016 to 2020 National Inpatient Sample. Journal Of Surgical Research 2024, 297: 136-143. PMID: 38518580, DOI: 10.1016/j.jss.2024.02.009.Peer-Reviewed Original ResearchConceptsBlack patientsNecrotizing fasciitisOutcomes of necrotizing soft tissue infectionsPediatric populationSoft-tissue infection casesWhite patientsRacial disparitiesDiagnosis of necrotizing fasciitisNSTI casesSoft tissue infectionsProportion of black patientsNational Inpatient SamplePostoperative complicationsTissue infectionsFournier's gangreneSurgical proceduresCross-sectional analysisInfection overallPatientsHispanic patientsInpatient SampleNSTIMortality rateSubcutaneous tissueFasciitis
2023
Hospital Admissions for Abusive Head Trauma Before and During the COVID-19 Pandemic
Maassel N, Graetz E, Schneider E, Asnes A, Solomon D, Leventhal J. Hospital Admissions for Abusive Head Trauma Before and During the COVID-19 Pandemic. JAMA Pediatrics 2023, 177: 1342-1347. PMID: 37870839, PMCID: PMC10594171, DOI: 10.1001/jamapediatrics.2023.4519.Peer-Reviewed Original ResearchConceptsAbusive head traumaCross-sectional studyMonthly hospitalizationsHead traumaClinical characteristicsSignificant decreaseCOVID-19 pandemicPediatric Health Information SystemTertiary care children's hospitalMean monthly incidenceClinical Modification codesHospitalization of childrenInterrupted time series analysisCOVID-19Subgroup of childrenHospital admissionChildren's HospitalTenth RevisionHospitalizationMAIN OUTCOMEInternational ClassificationSevere formCOVID-19 periodHealth information systemsPreventive effortsThe Degree of Preoperative Hypoalbuminemia Is Associated with Risk of Postoperative Complications in Metabolic and Bariatric Surgery Patients
Ying L, Chao G, Canner J, Graetz E, Ghiassi S, Schwartz J, Zolfaghari E, Schneider E, Gibbs K. The Degree of Preoperative Hypoalbuminemia Is Associated with Risk of Postoperative Complications in Metabolic and Bariatric Surgery Patients. Obesity Surgery 2023, 34: 51-70. PMID: 37994997, DOI: 10.1007/s11695-023-06944-1.Peer-Reviewed Original ResearchConceptsBariatric surgery patientsPostoperative complicationsOdds ratioRevision patientsSurgery patientsRevision surgeryIntensive care unit admissionQuality Improvement Program databaseDegree of hypoalbuminemiaImpact of hypoalbuminemiaPrevalence of hypoalbuminemiaCare unit admissionLaparoscopic sleeve gastrectomyGastric bypass patientsImprovement Program databaseBody mass indexInsulin-dependent diabetesMultivariable logistic regressionAnesthesia classMild hypoalbuminemiaPreoperative hypoalbuminemiaUnit admissionUnplanned intubationPrimary surgerySleeve gastrectomy
Academic Achievements & Community Involvement
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Yale School of Medicine
P.O. Box 208062
New Haven, CT 06520
United States