2022
Defining Referral Regions for Inpatient Trauma Care: The Utility of a Novel Geographic Definition
Zogg CK, Becher RD, Dalton MK, Hirji SA, Davis KA, Salim A, Cooper Z, Jarman MP. Defining Referral Regions for Inpatient Trauma Care: The Utility of a Novel Geographic Definition. Journal Of Surgical Research 2022, 275: 115-128. PMID: 35272088, PMCID: PMC9038698, DOI: 10.1016/j.jss.2021.12.050.Peer-Reviewed Original ResearchMeSH KeywordsAgedChildHospitalizationHospitalsHumansInpatientsReferral and ConsultationTrauma CentersConceptsHospital referral regionsReferral regionsHospital service areasTrauma regionTrauma careTrauma systemHospital useInpatient trauma careOlder adult patientsState Inpatient DatabasesUS health systemRegional trauma careInpatient traumaAdult patientsNET patientsTrauma patientsInpatient DatabaseDemographic featuresHealth systemImportant demographic factorsPatientsGeographic variationDemographic factorsTraumaCare
2021
The Utility of a Novel Definition of Health Care Regions in the United States in the Era of COVID-19: A Validation of the Pittsburgh Atlas Using Pneumonia Admissions
Dalton MK, Miller AL, Bergmark RW, Semco R, Zogg CK, Goralnick E, Jarman MP. The Utility of a Novel Definition of Health Care Regions in the United States in the Era of COVID-19: A Validation of the Pittsburgh Atlas Using Pneumonia Admissions. Annals Of Emergency Medicine 2021, 79: 518-526. PMID: 34952728, PMCID: PMC8612818, DOI: 10.1016/j.annemergmed.2021.11.017.Peer-Reviewed Original ResearchConceptsHealth care regionAcute medical conditionsState Inpatient DatabasesCare regionConcordant carePneumonia admissionsMedical conditionsQuality's State Inpatient DatabasesDiagnosis of sepsisRace/ethnicityInpatient DatabaseSecondary diagnosisInsurance statusPrimary diagnosisInclusion criteriaHospital regionReferral regionsEmergency careLevels of severityConcordance rateLogistic regressionDartmouth AtlasHealthcare ResearchCareHealth careReassessing the July Effect: 30 Years of Evidence Show No Difference in Outcomes
Zogg CK, Metcalfe D, Sokas CM, Dalton MK, Hirji SA, Davis KA, Haider AH, Cooper Z, Lichtman JH. Reassessing the July Effect: 30 Years of Evidence Show No Difference in Outcomes. Annals Of Surgery 2021, 277: e204-e211. PMID: 33914485, PMCID: PMC8384940, DOI: 10.1097/sla.0000000000004805.Peer-Reviewed Original ResearchConceptsJuly effectMajor morbidityPatient outcomesMajor adverse outcomesNationwide Readmissions DatabaseAdverse patient outcomesSystem-level factorsUS patientsAdverse outcomesSurgical conditionsInclusion criteriaPaucity of studiesReadmissionPatient encountersSystematic reviewMorbidityOutcomesNegative resultsMortalityYears of evidenceTotalYearsEvidencePatientsAdmissionPost-traumatic seizures following pediatric traumatic brain injury
Elsamadicy AA, Koo AB, David WB, Lee V, Zogg CK, Kundishora AJ, Hong C, Reeves BC, Sarkozy M, Kahle KT, DiLuna M. Post-traumatic seizures following pediatric traumatic brain injury. Clinical Neurology And Neurosurgery 2021, 203: 106556. PMID: 33636505, DOI: 10.1016/j.clineuro.2021.106556.Peer-Reviewed Original ResearchConceptsLoss of consciousnessTraumatic brain injuryPost-traumatic seizuresSeizure developmentBrain injuryRisk factorsPre-existing medical comorbiditiesPediatric traumatic brain injuryClinical risk factorsDevelopment of seizuresRate of seizuresDecrease healthcare costsEtiology of injuryType of injuryLogistic regression analysisQuality of careHospital complicationsMedical comorbiditiesNeurological complicationsPediatric patientsTBI patientsGreater proportionNinth RevisionSubarachnoid hemorrhageSecondary diagnosis
2020
Variation in Risk-standardized Rates and Causes of Unplanned Hospital Visits Within 7 Days of Hospital Outpatient Surgery
Desai MM, Zogg CK, Ranasinghe I, Parzynski CS, Lin Z, Gorbaty M, Merrill A, Krumholz HM, Drye EE. Variation in Risk-standardized Rates and Causes of Unplanned Hospital Visits Within 7 Days of Hospital Outpatient Surgery. Annals Of Surgery 2020, 276: e714-e720. PMID: 33214469, DOI: 10.1097/sla.0000000000004627.Peer-Reviewed Original ResearchConceptsUnplanned hospital visitsHospital outpatient surgeryHospital outpatient departmentsHospital visitsOutpatient surgeryShort-term safety outcomesFacility-level variationHierarchical logistic regression modelingPost-surgical visitSame-day surgeryHalf of proceduresLogistic regression modelingUrinary retentionStudy cohortUnplanned visitsClinical comorbiditiesOutpatient departmentOutpatient settingPreventable conditionPreventable reasonsBACKGROUND DATASafety outcomesMedicare feeSurgeryService beneficiariesHospital Variation in Geriatric Surgical Safety for Emergency Operation
Becher RD, Sukumar N, DeWane MP, Stolar MJ, Gill TM, Schuster KM, Maung AA, Zogg CK, Davis KA. Hospital Variation in Geriatric Surgical Safety for Emergency Operation. Journal Of The American College Of Surgeons 2020, 230: 966-973.e10. PMID: 32032720, PMCID: PMC7409563, DOI: 10.1016/j.jamcollsurg.2019.10.018.Peer-Reviewed Original ResearchConceptsStandardized mortality ratioHospital-level characteristicsGeneral surgery operationsGeriatric patientsEmergency operationHospital variationEmergency general surgery operationsMean standardized mortality ratioCalifornia State Inpatient DatabaseHospital-based mortalitySignificant hospital variationPatients 65 yearsSubstantial excess mortalitySurgery operationsState Inpatient DatabasesMixed effects logistic regression modelsCommon general surgery operationsLow-mortality outliersLogistic regression modelsPostoperative mortalityHospital deathOlder patientsInpatient DatabaseMortality outcomesNonelective operations
2019
Association of Medicaid Expansion Policy with Outcomes in Homeless Patients Requiring Emergency General Surgery
Manzano‐Nunez R, Zogg CK, Bhulani N, McCarty JC, Herrera‐Escobar J, Lu K, Andriotti T, Uribe‐Leitz T, de Jager E, Jarman MP, Haider AH, Ortega G. Association of Medicaid Expansion Policy with Outcomes in Homeless Patients Requiring Emergency General Surgery. World Journal Of Surgery 2019, 43: 1483-1489. PMID: 30706104, DOI: 10.1007/s00268-019-04932-0.Peer-Reviewed Original ResearchConceptsEmergency general surgeryNon-expansion statesMedical adviceHomeless patientsSurgical complicationsMedicaid expansionHospital chargesGeneral surgeryLower oddsPrimary EGS diagnosesHome healthcareMultivariable logistic regressionExpansion statesLength of stayNon-Medicaid expansion statesState Inpatient DatabasesMedicaid expansion statesMultivariable quantile regressionEGS proceduresClinical eventsEGS diagnosesInpatient DatabaseHomeless individualsHigher oddsNon-significant difference
2018
Impact of Affordable Care Act Insurance Expansion on Pre-Hospital Access to Care: Changes in Adult Perforated Appendix Admission Rates after Medicaid Expansion and the Dependent Coverage Provision
Zogg CK, Scott JW, Bhulani N, Gluck AR, Curfman GD, Davis KA, Dimick JB, Haider AH. Impact of Affordable Care Act Insurance Expansion on Pre-Hospital Access to Care: Changes in Adult Perforated Appendix Admission Rates after Medicaid Expansion and the Dependent Coverage Provision. Journal Of The American College Of Surgeons 2018, 228: 29-43.e1. PMID: 30359835, DOI: 10.1016/j.jamcollsurg.2018.09.022.Peer-Reviewed Original ResearchConceptsMedicaid expansionAffordable Care ActAdmission ratesPerforation rateInsurance coverageAffordable Care Act's insurance expansionInsurance expansionYoung adultsAcute surgical careDependent coverage provisionBetter patient outcomesFederal poverty levelRace/ethnicityAcute appendicitisHospitalized adultsAcute careParents' insuranceInpatient claimsPatient outcomesACA's impactSurgical careRisk populationsNonexpansion statesPrivileged patientsAge 26Cured into Destitution
Scott JW, Raykar NP, Rose JA, Tsai TC, Zogg CK, Haider AH, Salim A, Meara JG, Shrime MG. Cured into Destitution. Annals Of Surgery 2018, 267: 1093-1099. PMID: 28394867, DOI: 10.1097/sla.0000000000002254.Peer-Reviewed Original ResearchConceptsUninsured patientsGreater riskMedian inpatient chargesTrauma-related admissionsNationwide Inpatient SamplePrimary outcome measureMost demographic subgroupsRisk of CHECatastrophic health expenditureFinancial risk protectionRetrospective reviewTrauma populationPrimary diagnosisInpatient chargesInpatient SampleOutcome measuresPatientsSevere injuriesStudy periodUS Census dataHealth careTraumaAdmissionDemographic subgroupsRisk
2016
Rethinking Priorities
Zogg CK, Najjar P, Diaz A, Zogg DL, Tsai TC, Rose JA, Scott JW, Gani F, Alshaikh H, Nagarajan N, Canner JK, Schneider EB, Goldberg JE, Haider AH. Rethinking Priorities. Annals Of Surgery 2016, 264: 312-322. PMID: 26501705, DOI: 10.1097/sla.0000000000001511.Peer-Reviewed Original ResearchConceptsElective colectomyPrimary diagnosisNationwide Inpatient Sample dataIncremental costBenign colonic neoplasmsSystem-based complicationsCost of complicationsSurgical quality improvement initiativesIncremental hospital costsLong-term treatmentQuality improvement initiativesExperienced complicationsInfectious complicationsCardiovascular complicationsComplication groupDiverticular diseaseOpen resectionAdult patientsFrequent diagnosisColonic neoplasmsHospital costsOperative techniqueColectomyComplicationsHealthcare costsHospital case volume and outcomes for proximal femoral fractures in the USA: an observational study
Metcalfe D, Salim A, Olufajo O, Gabbe B, Zogg C, Harris MB, Perry DC, Costa ML. Hospital case volume and outcomes for proximal femoral fractures in the USA: an observational study. BMJ Open 2016, 6: e010743. PMID: 27056592, PMCID: PMC4838676, DOI: 10.1136/bmjopen-2015-010743.Peer-Reviewed Original ResearchConceptsHigh-volume hospitalsHip fractureObservational studyIsolated hip fractureRate of pneumoniaHip fracture careHospital case volumeLow-volume hospitalsProximal femoral fracturesLength of stayPatient safety imperativeHospital mortalityVenous thromboembolismSecondary outcomesFracture careClinical outcomesFemoral fracturesAcute hospitalsPatient outcomesInclusion criteriaPressure ulcersCase volumeHospitalOlder adultsOutcomesAccess to post-discharge inpatient care after lower limb trauma
Metcalfe D, Davis WA, Olufajo OA, Rios-Diaz AJ, Chaudhary MA, Harris MB, Zogg CK, Weaver MJ, Salim A. Access to post-discharge inpatient care after lower limb trauma. Journal Of Surgical Research 2016, 203: 140-144. PMID: 27338544, DOI: 10.1016/j.jss.2016.02.036.Peer-Reviewed Original ResearchConceptsLength of stayHospital LOSLower limb traumaLimb traumaInsurance statusUninsured patientsInpatient careLonger hospital LOSCalifornia State Inpatient DatabaseState Inpatient DatabasesLower limb injuriesNon-acute servicesAcute hospitalizationHospital dischargeInpatient DatabaseHospital characteristicsTrauma bedsClinical ModificationLimb injuriesObservational studyLower oddsEmergency careInternational ClassificationPatientsPrivate insurance
2015
Analgesic Access for Acute Abdominal Pain in the Emergency Department Among Racial/Ethnic Minority Patients
Shah AA, Zogg CK, Zafar SN, Schneider EB, Cooper LA, Chapital AB, Peterson SM, Havens JM, Thorpe RJ, Roter DL, Castillo RC, Salim A, Haider AH. Analgesic Access for Acute Abdominal Pain in the Emergency Department Among Racial/Ethnic Minority Patients. Medical Care 2015, 53: 1000-1009. PMID: 26569642, DOI: 10.1097/mlr.0000000000000444.Peer-Reviewed Original ResearchMeSH KeywordsAbdominal PainAcute PainAdolescentAdultAgedAnalgesicsBlack or African AmericanDiagnostic Techniques and ProceduresEmergency Service, HospitalEthnicityFemaleHealth Care SurveysHealthcare DisparitiesHispanic or LatinoHospitalizationHumansLength of StayMaleMiddle AgedNarcoticsRacial GroupsResidence CharacteristicsRetrospective StudiesSocioeconomic FactorsTime FactorsWhite PeopleYoung AdultConceptsAcute abdominal painLower risk-adjusted oddsRisk-adjusted oddsAbdominal painRace/ethnicityEmergency departmentMinority patientsEthnic disparitiesNontraumatic acute abdominal painRisk-adjusted multivariable analysisNon-Hispanic black patientsNon-Hispanic white patientsRace/ethnicity-based differencesEthnic group patientsModerate-severe painPatient-reported painPatients 18 yearsProportion of patientsSubsequent inpatient admissionSurgery of TraumaRisk-adjusted differencesED wait timesNon-Hispanic blacksEthnic minority patientsUniform definitionThe hazards of off-road motor sports: Are four wheels better than two?
Villegas CV, Bowman SM, Zogg CK, Scott VK, Haut ER, Stevens KA, Efron DT, Haider AH. The hazards of off-road motor sports: Are four wheels better than two? Injury 2015, 47: 178-183. PMID: 26319205, DOI: 10.1016/j.injury.2015.08.001.Peer-Reviewed Original ResearchConceptsHigher risk-adjusted oddsRisk-adjusted oddsATV patientsIntensive care unit admissionNational Trauma Data BankCrash victimsCare unit admissionInjury prevention planningUS National Trauma Data BankTrauma Data BankRelative safety profileUnit admissionAbdominal injuriesRetrospective reviewAnatomic injuryInjury characteristicsSevere headAnatomic distributionSafety profileTrauma outcomesInclusion criteriaPatientsSevere injuriesLogistic regressionInjuryIncremental Cost of Emergency Versus Elective Surgery
Haider AH, Obirieze A, Velopulos CG, Richard P, Latif A, Scott VK, Zogg CK, Haut ER, Efron DT, Cornwell EE, MacKenzie EJ, Gaskin DJ. Incremental Cost of Emergency Versus Elective Surgery. Annals Of Surgery 2015, 262: 260-266. PMID: 25521669, DOI: 10.1097/sla.0000000000001080.Peer-Reviewed Original ResearchConceptsAbdominal aortic aneurysm repairCoronary artery bypass graftAortic aneurysm repairArtery bypass graftEmergency surgeryElective surgeryAneurysm repairBypass graftColon resectionAdjusted oddsNationwide Inpatient Sample dataMean cost differenceElective surgery patientsMultivariable logistic regressionDischarge-level weightsAdjusted riskSurgery patientsEmergent proceduresCare coordinationElective admissionsWorse outcomesHospital costsCost differencesEmergent casesElective care