2022
Variation in pre-operative insurance requirements for bariatric surgery
Gomez-Rexrode A, Chhabra K, Telem D, Chao G. Variation in pre-operative insurance requirements for bariatric surgery. Surgical Endoscopy 2022, 36: 8358-8363. PMID: 35513536, DOI: 10.1007/s00464-022-09293-9.Peer-Reviewed Original ResearchConceptsBariatric surgeryInsurance typePoisson regressionInsurance plan typeBariatric surgery programLife-saving interventionsCross-sectional assessmentPlan typeBackgroundFor patientsSecondary outcomesPrimary outcomeU.S. Census regionSurgery programMedicaid plansPatientsSurgeryWeight lossMedicaidNumber of monthsInsurance plansCommercial plansCensus regionGreater frequencyInsurance requirementsGreater numberLong-term comparative effectiveness of gastric bypass and sleeve gastrectomy on use of antireflux medication: a difference-in-differences analysis
Howard R, Yang J, Thumma J, Arterburn D, Ryan A, Chao G, Telem D, Dimick J. Long-term comparative effectiveness of gastric bypass and sleeve gastrectomy on use of antireflux medication: a difference-in-differences analysis. Surgery For Obesity And Related Diseases 2022, 18: 1033-1041. PMID: 35649735, DOI: 10.1016/j.soard.2022.04.016.Peer-Reviewed Original ResearchConceptsLong-term comparative effectivenessGERD medication useCommon bariatric operationGastric bypassMedication useSleeve gastrectomyAntireflux medicationComparative effectivenessBariatric surgeryBariatric operationsAntireflux medication useInpatient bariatric surgeryLong-term effectivenessGastroesophageal refluxRetrospective studyNational cohortGastrectomyTreatment decisionsMedicare beneficiariesPatientsSurgeryBypassMedicationsGreater reductionDifferential changesMedication Use for Obesity-Related Comorbidities After Sleeve Gastrectomy or Gastric Bypass
Howard R, Chao G, Yang J, Thumma J, Arterburn D, Telem D, Dimick J. Medication Use for Obesity-Related Comorbidities After Sleeve Gastrectomy or Gastric Bypass. JAMA Surgery 2022, 157: 248-256. PMID: 35019988, PMCID: PMC8756362, DOI: 10.1001/jamasurg.2021.6898.Peer-Reviewed Original ResearchConceptsTime of surgeryGastric bypassMedication discontinuationSleeve gastrectomyCumulative incidenceMedication useHyperlipidemia medicationsComorbidity resolutionLower incidenceCommon bariatric surgical proceduresLipid-lowering medication useComparative effectiveness research studyAdult Medicare beneficiariesDiabetes medication useAntihypertensive medication useLipid-lowering medicationsBariatric surgical proceduresSubset of patientsLong-term trialsAntihypertensive medicationsDiabetes medicationsLaparoscopic RouxBariatric surgeryPrimary outcomeMean age
2020
Bariatric Surgery in Medicare Patients
Chao G, Chhabra K, Yang J, Thumma J, Arterburn D, Ryan A, Telem D, Dimick J. Bariatric Surgery in Medicare Patients. Annals Of Surgery 2020, 276: 133-139. PMID: 33214440, PMCID: PMC8126578, DOI: 10.1097/sla.0000000000004526.Peer-Reviewed Original ResearchConceptsBariatric surgeryED utilizationHealthcare utilizationClinical safety outcomesMedicare Evidence DevelopmentBariatric surgery patientsTreatment effectsGastric bypassSurgery patientsMedicare cohortBariatric outcomesMedicare patientsHernia repairMedicare claimsSafety outcomesMedicare beneficiariesComparative effectivenessBypassSurgeryInstrumental variable analysisEvidence developmentReinterventionRehospitalizationComplicationsPatients
2018
Revised cardiac risk index poorly predicts cardiovascular complications after adhesiolysis for small bowel obstruction
Asuzu DT, Chao GF, Pei KY. Revised cardiac risk index poorly predicts cardiovascular complications after adhesiolysis for small bowel obstruction. Surgery 2018, 164: 1198-1203. PMID: 29945781, DOI: 10.1016/j.surg.2018.05.012.Peer-Reviewed Original ResearchConceptsCardiac Risk IndexSmall bowel obstructionCardiovascular complicationsBowel obstructionRisk calculatorNational Surgical Quality Improvement Program risk calculatorNational Surgical Quality Improvement Program datasetSurgeons National Surgical Quality Improvement ProgramNational Surgical Quality Improvement ProgramSurgical Quality Improvement ProgramCardiac risk evaluationLarge surgical samplesPreoperative cardiac evaluationPreoperative risk stratificationNumber of patientsUnivariable logistic regressionQuality Improvement ProgramRisk indexSurgical subgroupsCardiac complicationsCardiac evaluationCardiac eventsLaparoscopic adhesiolysisSurgical patientsPreoperative testingMesenteric vasculitis and ischaemia: every second counts
Hirji S, Chung C, Chao G, Millham F. Mesenteric vasculitis and ischaemia: every second counts. BMJ Case Reports 2018, 2018: bcr-2017-223849. PMID: 29523616, PMCID: PMC5847845, DOI: 10.1136/bcr-2017-223849.Peer-Reviewed Original Research
2017
Differences in rural and urban outcomes: a national inspection of emergency general surgery patients
Chaudhary MA, Shah AA, Zogg CK, Changoor N, Chao G, Nitzschke S, Havens JM, Haider AH. Differences in rural and urban outcomes: a national inspection of emergency general surgery patients. Journal Of Surgical Research 2017, 218: 277-284. PMID: 28985861, DOI: 10.1016/j.jss.2017.06.034.Peer-Reviewed Original ResearchConceptsLength of stayRural patientsEGS conditionsUrban hospitalOverall oddsEmergency general surgery conditionsEmergency general surgery patientsShorter LOSGeneral surgery patientsPatient-level factorsLimited clinical importanceNational Inpatient SampleSurgery of TraumaRegionalization of careCost of careMultivariable regression modelsUnited States populationHospital mortalityEGS patientsSurgery patientsUrban patientsAdult patientsMajor complicationsPrimary diagnosisInpatient Sample
2015
Asian Americans and prostate cancer: A nationwide population-based analysis
Chao GF, Krishna N, Aizer AA, Dalela D, Hanske J, Li H, Meyer CP, Kim SP, Mahal BA, Reznor G, Schmid M, Choueiri TK, Nguyen PL, O׳Leary M, Trinh QD. Asian Americans and prostate cancer: A nationwide population-based analysis. Urologic Oncology Seminars And Original Investigations 2015, 34: 233.e7-233.e15. PMID: 26725248, DOI: 10.1016/j.urolonc.2015.11.013.Peer-Reviewed Original ResearchConceptsAsian Indians/PakistanisPCa-specific mortalityIndians/PakistanisProstate cancerDefinitive treatmentBetter cancer-specific survivalNationwide population-based analysisPacific IslandersCancer-specific survivalEnd Results (SEER) databaseAdvanced prostate cancerLocalized prostate cancerMetastatic prostate cancerNon-Hispanic white counterpartsPopulation-based analysisEthnic groupsPCa deathAAPI groupsResults databaseWorse outcomesCancer profileGreater riskRacial disparitiesFilipino menMenCancer-Specific Mortality of Asian Americans Diagnosed With Cancer: A Nationwide Population-Based Assessment
Trinh QD, Nguyen PL, Leow JJ, Dalela D, Chao GF, Mahal BA, Nayak M, Schmid M, Choueiri TK, Aizer AA. Cancer-Specific Mortality of Asian Americans Diagnosed With Cancer: A Nationwide Population-Based Assessment. Journal Of The National Cancer Institute 2015, 107: djv054. PMID: 25794888, DOI: 10.1093/jnci/djv054.Peer-Reviewed Original ResearchConceptsCancer-specific mortalityNon-Hispanic white patientsWhite patientsDefinitive treatmentColorectal cancerRisk regressionLower cancer-specific mortalityAsian subgroupsCancer-specific survivalAsian American cancer patientsEnd Results ProgramAmerican cancer patientsCancer survival outcomesInequality of careNon-Hispanic whitesHazard ratioNationwide PopulationIndependent predictorsTumor characteristicsResults ProgramSurvival outcomesPotential confoundersCancer careCancer patientsCancer survival