2024
Impact of COVID-19 Pandemic on Emergency Department Visits for Opioid Use Disorder Across University of California Health Centers
Heshmatipour M, Ng D, Truong E, Zheng J, Chan A, Wang Y. Impact of COVID-19 Pandemic on Emergency Department Visits for Opioid Use Disorder Across University of California Health Centers. Western Journal Of Emergency Medicine 2024, 0: 883-889. PMID: 39625758, PMCID: PMC11610740, DOI: 10.5811/westjem.18468.Peer-Reviewed Original ResearchConceptsEmergency department visitsED visit ratesSynthetic opioid overdoseOpioid-related eventsOpioid-related ED visitsED visitsOpioid overdoseElectronic health recordsHealth centersDepartment visitsVisit ratesSynthetic opioidsCOVID-19 pandemicRate ratiosRates of emergency department visitsConfidence intervalsOpioid use disorderNegative binomial regressionPrescription opioid overdoseInternational Classification of DiseasesHealth recordsClinical Modification codesClassification of diseasesAcademic medical centerMonthly visit ratesImpact of the COVID-19 Pandemic on Health Care Utilization in the Vaccine Safety Datalink: Retrospective Cohort Study
Qian L, Sy L, Hong V, Glenn S, Ryan D, Nelson J, Hambidge S, Crane B, Zerbo O, DeSilva M, Glanz J, Donahue J, Liles E, Duffy J, Xu S. Impact of the COVID-19 Pandemic on Health Care Utilization in the Vaccine Safety Datalink: Retrospective Cohort Study. JMIR Public Health And Surveillance 2024, 10: e48159. PMID: 38091476, PMCID: PMC10807656, DOI: 10.2196/48159.Peer-Reviewed Original ResearchKaiser Permanente Southern CaliforniaHealth care utilizationLater pandemic periodsRetrospective cohort studyElectronic health record dataPre-pandemic levelsEarly pandemic periodHealth record dataCare utilizationCare settingsVisit ratesPre-pandemic periodED visitsCohort studyEmergency departmentCOVID-19Vaccine Safety Datalink ProjectHealth care organizationsCOVID-19 pandemicVaccine Safety DatalinkRecord dataEntire study populationPandemic periodCare organizationsHealth care settingsRacial Disparities in Telemedicine Uptake during the COVID-19 Pandemic among Patients with Hematologic Malignancies in the United States
Neparidze N, W. Lau K, Wang X, Huntington S, Jamy O, S. Calip G, Shah H, M. Stephens D, Miksad R, Parikh R, Takvorian S, Goyal G, Seymour E. Racial Disparities in Telemedicine Uptake during the COVID-19 Pandemic among Patients with Hematologic Malignancies in the United States. Medical Research Archives 2024, 12 DOI: 10.18103/mra.v12i2.5164.Peer-Reviewed Original ResearchAcute myelogenous leukemiaMantle cell lymphomaChronic lymphocytic leukemiaDiffuse large B-cell lymphomaFollicular lymphomaMultiple myelomaWhite patientsBlack patientsCell lymphomaHematologic malignanciesLymphocytic leukemiaTreatment categoriesElectronic health record (EHR)-derived de-identified databaseDiagnosis of acute myelogenous leukemiaLarge B-cell lymphomaTelemedicine uptakeActive patientsLines of therapyB-cell lymphomaMonthly visit ratesMyeloma patientsVisit ratesAnalyzed patientsMyelogenous leukemiaLymphoma
2023
National trends in emergency conditions through the Omicron COVID‐19 wave in commercial and Medicare Advantage enrollees
Stevens M, Melnick E, Savitz S, Jeffery M, Nath B, Janke A. National trends in emergency conditions through the Omicron COVID‐19 wave in commercial and Medicare Advantage enrollees. Journal Of The American College Of Emergency Physicians Open 2023, 4: e13023. PMID: 37576118, PMCID: PMC10423035, DOI: 10.1002/emp2.13023.Peer-Reviewed Original ResearchEmergency care-sensitive conditionsMedicare Advantage enrolleesED visitsVisit ratesPulmonary embolismPandemic waveWave 2Acute cardiovascular conditionsCause ED visitsMyocardial infarction rateED visit ratesEmergency department visitsPre-pandemic ratesCross-sectional analysisPre-pandemic periodInfarction rateCOVID-19 waveDepartment visitsSevere arrhythmiasFemale enrolleesMyocardial infarctionCardiovascular conditionsPercent changeSensitive conditionsEnrolleesThe COVID-19 Pandemic and In-Person Visit Rate Disruptions Among Patients With Hematologic Neoplasms in the US in 2020 to 2021
Goyal G, Lau K, Wang X, Davidoff A, Huntington S, Jamy O, Calip G, Shah H, Stephens D, Miksad R, Parikh R, Takvorian S, Neparidze N, Seymour E. The COVID-19 Pandemic and In-Person Visit Rate Disruptions Among Patients With Hematologic Neoplasms in the US in 2020 to 2021. JAMA Network Open 2023, 6: e2316642. PMID: 37273206, PMCID: PMC10242428, DOI: 10.1001/jamanetworkopen.2023.16642.Peer-Reviewed Original ResearchConceptsEarly pandemic monthsOral therapyOutpatient infusionsChronic lymphocytic leukemiaHematologic neoplasmsVisit ratesTelemedicine useCohort studyPandemic monthsLymphocytic leukemiaRetrospective observational cohort studyData cutoff datePerson medical careSubsequent cancer outcomesHalf of patientsObservational cohort studyMantle cell lymphomaCOVID-19COVID-19 pandemicNon-Hispanic whitesMedian ageActive treatmentCancer outcomesMultiple myelomaActive patients
2022
Spatiotemporal varying coefficient model for respiratory disease mapping in Taiwan
Wang F, Duan C, Li Y, Huang H, Shia B. Spatiotemporal varying coefficient model for respiratory disease mapping in Taiwan. Biostatistics 2022, 25: 40-56. PMID: 36484310, DOI: 10.1093/biostatistics/kxac046.Peer-Reviewed Original ResearchConceptsHospital visit ratesFinite sample performanceVisit ratesBayesian disease mapping modelsGlobal public health problemIntegrated Nested Laplace ApproximationSpatially varying coefficientsPublic health problemNested Laplace ApproximationSample performanceRespiratory diseaseDisease mapping modelsAir pollutionLaplace approximationHealth problemsRespiratory disease dataTemporal trendsPatterns of Care Utilization and Hepatocellular Carcinoma Surveillance: Tracking Care Across the Pandemic
Serper M, Tapper EB, Kaplan DE, Taddei TH, Mahmud N. Patterns of Care Utilization and Hepatocellular Carcinoma Surveillance: Tracking Care Across the Pandemic. The American Journal Of Gastroenterology 2022, 118: 294-303. PMID: 36114778, PMCID: PMC9898115, DOI: 10.14309/ajg.0000000000002011.Peer-Reviewed Original ResearchConceptsOutpatient primary care providerHepatocellular carcinoma surveillancePrimary care providersHCC surveillanceCare providersHCC surveillance ratesGastroenterology/hepatologyFacility-level variablesCirrhosis cohortPatient demographicsClinical factorsTotal cohortCare utilizationNational cohortOutpatient utilizationSpecialty careInpatient careMultivariable modelPercentage of timePopulation-based approachSurveillance ratesAppointment ratesAdjusted modelVisit ratesCoronavirus diseaseEMS Non-Transport of Low-Risk COVID-19 Patients
Couturier K, Nelson AR, Burns K, Cone DC, Rollins M, Venkatesh AK, Ulrich A, Shapiro M, Joseph D. EMS Non-Transport of Low-Risk COVID-19 Patients. Prehospital Emergency Care 2022, 27: 310-314. PMID: 35639643, DOI: 10.1080/10903127.2022.2083278.Peer-Reviewed Original ResearchConceptsEMS cliniciansLow-risk COVID-19 patientsSuburban EMS systemLow-risk patientsED visit ratesEMS systemCOVID-19 patientsCOVID-19 infectionCOVID-19ED visitsRetrospective reviewEmergency departmentCOVID-19 casesProtocol violationsCommon reasonConnecticut OfficeHospital resourcesPatientsSmall studyVisit ratesVital signsHealth systemSymptomsReasonable adherenceCliniciansPrimary care doctor and nurse consultations among people who live in slums: a retrospective, cross-sectional survey in four countries
Watson S, Bakibinga P, Kabaria C, Kasiira Z, Kibe P, Kyobutungi C, Mbaya N, Mberu B, Mohammed S, Njeri A, Azam I, Iqbal R, Nazish A, Rizvi N, Syed A, Ahmed S, Choudhury N, Alam O, Khan A, Rahman O, Yusuf R, Odubanjo D, Ayobola M, Fayehun O, Omigbodun A, Osuh M, Owoaje E, Taiwo O, Lilford R, Sartori J, Watson S, Diggle P, Aujla N, Chen Y, Conlan C, Gill P, Griffiths F, Harris B, Madan J, Muir H, Oyebode O, Pitidis V, de Albuquerque J, Smith S, Taylor C, Tregonning G, Ulbrich P, Uthman O, Wilson R, Yeboah G, Park J. Primary care doctor and nurse consultations among people who live in slums: a retrospective, cross-sectional survey in four countries. BMJ Open 2022, 12: e054142. PMID: 34996795, PMCID: PMC8744106, DOI: 10.1136/bmjopen-2021-054142.Peer-Reviewed Original ResearchConceptsConsultation ratesPrimary care consultation ratesPrimary care servicesHealth-seeking behaviorPrimary care doctorsCross-sectional surveyHospital outpatient departmentsMonthly total expenditureSecondary outcome measuresHigh-income countriesNurse consultantsCare doctorsCare servicesProvider typeMedian travel timeSlum sitesChild surveysChronic diseasesSlum populationTraditional healersProvidersOutpatient departmentMedian costVisit ratesVisits
2021
Impact of the COVID-19 Pandemic on in-Person Visit Rates Among Patients with Hematologic Malignancies in the United States
Goyal G, Lau K, Wang X, Davidoff A, Huntington S, Jamy O, Calip G, Shah H, Stephens D, Miksad R, Parikh R, Takvorian S, Neparidze N, Seymour E. Impact of the COVID-19 Pandemic on in-Person Visit Rates Among Patients with Hematologic Malignancies in the United States. Blood 2021, 138: 1930. PMCID: PMC8701834, DOI: 10.1182/blood-2021-153625.Peer-Reviewed Original ResearchCurrent equity holderEarly pandemic monthsLines of therapyHematologic malignanciesVisit ratesTreatment typePandemic monthsAdvisory CommitteeCAR T-cell therapyPerson medical careDiagnosis of AMLDe-identified databaseCOVID-19 pandemicSignificant reductionPandemic periodCurrent employmentElectronic health recordsFlatiron HealthOral therapyActive treatmentHematopoietic transplantsInitial diagnosisCSL BehringOutpatient infusionsActive patientsRacial Disparities in Telemedicine Uptake during the COVID-19 Pandemic Among Patients with Hematologic Malignancies in the United States
Neparidze N, Lau K, Wang X, Davidoff A, Huntington S, Jamy O, Calip G, Shah H, Stephens D, Miksad R, Parikh R, Takvorian S, Goyal G, Seymour E. Racial Disparities in Telemedicine Uptake during the COVID-19 Pandemic Among Patients with Hematologic Malignancies in the United States. Blood 2021, 138: 1973. PMCID: PMC8701527, DOI: 10.1182/blood-2021-153787.Peer-Reviewed Original ResearchCurrent equity holderWhite patientsBlack patientsInpatient treatmentVisit ratesTelemedicine uptakeTreatment categoriesPerson visitsHematologic malignanciesAdvisory CommitteeTreatment typeSignificant reductionRacial disparitiesLines of therapyDiagnosis of AMLDe-identified databaseEarly pandemic monthsPotential racial disparitiesCurrent employmentElectronic health recordsFlatiron HealthHospital admissionActive treatmentInitial diagnosisCSL BehringEmergency Department Visits for Nonfatal Opioid Overdose During the COVID-19 Pandemic Across Six US Health Care Systems
Soares WE, Melnick ER, Nath B, D'Onofrio G, Paek H, Skains RM, Walter LA, Casey MF, Napoli A, Hoppe JA, Jeffery MM. Emergency Department Visits for Nonfatal Opioid Overdose During the COVID-19 Pandemic Across Six US Health Care Systems. Annals Of Emergency Medicine 2021, 79: 158-167. PMID: 34119326, PMCID: PMC8449788, DOI: 10.1016/j.annemergmed.2021.03.013.Peer-Reviewed Original ResearchConceptsHealth care systemCause ED visitsNonfatal opioid overdoseED visitsOpioid use disorderCare systemOpioid overdoseUse disordersCOVID-19 pandemicOpioid-related complicationsEmergency department visitsHospital-based interventionsED visit ratesEmergency department utilizationVisit countsUS health care systemOpioid overdose ratesDepartment visitsHistorical controlsAdult visitsOpioid overdosesOverdose ratesMedical emergencyVisit ratesMore weeks
2020
Unscheduled Care Access in the United States-A Tale of Two Emergency Departments
Venkatesh AK, Greenwood-Ericksen MB, Mei H, Rothenberg C, Lin Z, Krumholz HM. Unscheduled Care Access in the United States-A Tale of Two Emergency Departments. The American Journal Of Emergency Medicine 2020, 45: 374-377. PMID: 33143957, PMCID: PMC8076339, DOI: 10.1016/j.ajem.2020.08.095.Peer-Reviewed Original ResearchConceptsHospital referral regionsED visit ratesEmergency departmentCare ratesVisit ratesMedicare Chronic Conditions WarehouseHospital-based emergency departmentsRole of EDsChronic Conditions WarehouseProportion of beneficiariesDartmouth Atlas hospital referral regionHealthcare delivery systemED utilizationED visitsED useUnscheduled careReferral regionsUrban zip codesCare accessMedicare beneficiariesCare needsCare deliveryOffice settingCare capabilitiesDisproportionate barriersCross‐sectional Analysis of Emergency Department and Acute Care Utilization Among Medicare Beneficiaries
Venkatesh AK, Mei H, Shuling L, D’Onofrio G, Rothenberg C, Lin Z, Krumholz HM. Cross‐sectional Analysis of Emergency Department and Acute Care Utilization Among Medicare Beneficiaries. Academic Emergency Medicine 2020, 27: 570-579. PMID: 32302034, DOI: 10.1111/acem.13971.Peer-Reviewed Original ResearchConceptsMultiple chronic conditionsEmergency departmentUnscheduled careMedicare beneficiariesCross-sectional analysisVisit ratesCare servicesHighest ED visit ratesNumber of EDVulnerable subpopulationsSkilled nursing facility useAmbulatory office settingNon-ED settingsUnscheduled care servicesAcute care utilizationED visit ratesOffice-based visitsAcute care servicesClaims-based definitionNursing facility useMedicare beneficiaries age 65Dual-eligible beneficiariesOlder adult populationBeneficiaries age 65Care visits
2019
Statewide Intervention to Improve Medical Care Services Utilization Patterns of Adults Living with Sickle Cell Disease
Roberts J, Andemariam B, Bozzo J, Du C, Curtis S, Latham D, Cyr M, Magras L. Statewide Intervention to Improve Medical Care Services Utilization Patterns of Adults Living with Sickle Cell Disease. Blood 2019, 134: 517. DOI: 10.1182/blood-2019-124462.Peer-Reviewed Original ResearchSickle cell diseaseED/hospitalCommunity health networksED visitsED visit ratesEmergency departmentHospital visitsClinical team membersCell diseaseHealth NetworkHospitalization ratesHospital utilizationVisit ratesAdvisory CommitteeUtilization dataICD-9/ICDInstitutional review board approvalMedicaid programAmbulatory care servicesService utilization patternsTruven Health AnalyticsAge 16 yearsQuality improvement projectReview board approvalMann-Whitney U testImpact of an oncology urgent care clinic on emergency department rates.
Sedghi T, Canavan M, Gross C, Davidoff A, Gould Rothberg BE, Strait M, Sinanis N, Adelson K. Impact of an oncology urgent care clinic on emergency department rates. Journal Of Clinical Oncology 2019, 37: 6615-6615. DOI: 10.1200/jco.2019.37.15_suppl.6615.Peer-Reviewed Original ResearchUrgent care clinicED visit ratesSmilow Cancer HospitalVisit ratesProvider visitsED utilizationED visitsCare clinicsUnique patientsEmergency departmentAcute medical attentionUnscheduled emergency departmentRegular clinic visitsCommon cancer typesLower ED utilizationEmergency department ratesFull study sampleTwo-sample t-testClinic visitsSupportive careOncology providersED useSymptom managementCancer HospitalCancer Center
2018
Association Between Postdischarge Emergency Department Visitation and Readmission Rates
Venkatesh AK, Wang C, Wang Y, Altaf F, Bernheim SM, Horwitz L. Association Between Postdischarge Emergency Department Visitation and Readmission Rates. Journal Of Hospital Medicine 2018, 13: 589-594. PMID: 29538471, DOI: 10.12788/jhm.2937.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionED visit ratesHospital-level variationReadmission ratesHeart failureED visitsHospital dischargeED visitationVisit ratesMedicare beneficiariesMedicare Standard Analytic FilesPostdischarge ED visitsDays of hospitalizationEmergency department visitsHospital readmission ratesLower readmission ratesStandard Analytic FilesEmergency department (ED) visitationSignificant inverse correlationCross-sectional analysisDepartment visitsMyocardial infarctionAnalytic FilesED servicesPneumonia
2017
Impact of treatment regimen on acute care use during and after adjuvant chemotherapy for early-stage breast cancer
Ruddy KJ, Van Houten HK, Sangaralingham LR, Freedman RA, Thompson CA, Hashmi SK, Jemal A, Haddad TC, Mougalian S, Herrin J, Gross C, Shah N. Impact of treatment regimen on acute care use during and after adjuvant chemotherapy for early-stage breast cancer. Breast Cancer Research And Treatment 2017, 164: 515-525. PMID: 28493045, DOI: 10.1007/s10549-017-4280-y.Peer-Reviewed Original ResearchConceptsAcute care useEarly-stage breast cancerCare useBreast cancerAdjuvant chemotherapyContemporary adjuvant chemotherapyAcute care needsCommercial insurance databaseEmergency department visitsED visit ratesRate of hospitalizationOncology Care ModelChemotherapy initiationChemotherapy regimenEligible patientsED visitsDepartment visitsTreatment regimenAcute careInsurance databaseAdministration periodAdjusted ratesCare modelCare needsVisit ratesNational Trends in Antidepressant, Benzodiazepine, and Other Sedative-Hypnotic Treatment of Older Adults in Psychiatric and Primary Care.
Maust DT, Blow FC, Wiechers IR, Kales HC, Marcus SC. National Trends in Antidepressant, Benzodiazepine, and Other Sedative-Hypnotic Treatment of Older Adults in Psychiatric and Primary Care. The Journal Of Clinical Psychiatry 2017, 78: e363-e371. PMID: 28448697, PMCID: PMC5408458, DOI: 10.4088/jcp.16m10713.Peer-Reviewed Original ResearchConceptsPrimary care providersPrimary carePain diagnosisCare providersOlder adultsClinical characteristicsNational Ambulatory Medical Care SurveyNon-Hispanic white patientsAmbulatory Medical Care SurveyMental healthCommon psychotropic medicationsOutpatient physician visitsPrimary care visitsUse of antidepressantsMental health treatmentCare visitsMedication usePhysician visitsWhite patientsPsychotropic medicationsCare SurveyPsychotropic useHealth treatmentVisit ratesAntidepressants
2016
No End in Sight: Benzodiazepine Use in Older Adults in the United States
Maust DT, Kales HC, Wiechers IR, Blow FC, Olfson M. No End in Sight: Benzodiazepine Use in Older Adults in the United States. Journal Of The American Geriatrics Society 2016, 64: 2546-2553. PMID: 27879984, PMCID: PMC5173408, DOI: 10.1111/jgs.14379.Peer-Reviewed Original ResearchConceptsMental health diagnosesBenzodiazepine useBenzodiazepine usersOlder adultsNonpsychiatrist physiciansNational Ambulatory Medical Care SurveyVisit ratesAmbulatory Medical Care SurveyAnnual visit rateHealth diagnosisEffective alternative treatmentCross-sectional analysisPatient ageOutpatient encountersClinical mental health diagnosisCare SurveyVisit characteristicsChronic usersAlternative treatmentYoung adultsVisitsDecades of evidenceOverall proportionAdultsSafety concerns
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