Walter S. Mathis, MD
Assistant Professor of PsychiatryCards
About
Research
Publications
2024
Reflections on inductive thematic saturation as a potential metric for measuring the validity of an inductive thematic analysis with LLMs
De Paoli S, Mathis W. Reflections on inductive thematic saturation as a potential metric for measuring the validity of an inductive thematic analysis with LLMs. Quality & Quantity 2024, 1-27. DOI: 10.1007/s11135-024-01950-6.Peer-Reviewed Original ResearchInductive thematic analysis of healthcare qualitative interviews using open-source large language models: How does it compare to traditional methods?
Mathis W, Zhao S, Pratt N, Weleff J, De Paoli S. Inductive thematic analysis of healthcare qualitative interviews using open-source large language models: How does it compare to traditional methods? Computer Methods And Programs In Biomedicine 2024, 255: 108356. PMID: 39067136, DOI: 10.1016/j.cmpb.2024.108356.Peer-Reviewed Original ResearchLanguage modelThematic analysisInductive thematic analysisQualitative thematic analysisGenerative artificial intelligenceSemi-structured interviewsLocal hardwareArtificial intelligenceHealth informationReal worldPsychiatric settingsHuman codingQualitative interviewsQualitative dataEvaluation methodologyQuantify similarityRobust themesThemesResearch settingsTraditional methodsEngineering techniquesInterviewsEvaluation methodQualitative researchCorpus of interviewsTimelinePTC: Development of a unified interface for pathways to care collection, visualization, and collaboration in first episode psychosis
Mathis W, Ferrara M, Cahill J, Karmani S, Tayfur S, Srihari V. TimelinePTC: Development of a unified interface for pathways to care collection, visualization, and collaboration in first episode psychosis. PLOS ONE 2024, 19: e0302116. PMID: 39028697, PMCID: PMC11259254, DOI: 10.1371/journal.pone.0302116.Peer-Reviewed Original ResearchConceptsPathways to CareDuration of untreated psychosisManual transcription errorsDevelopment of targeted interventionsReduce duration of untreated psychosisHealthcare accessibility researchReal-time data entryImprove patient outcomesEpisode psychosisCare pathwaysPatient journeyHealthcare contextPatient outcomesPaper-basedConversion of collected dataFEP treatmentData collection processNew HavenData collection methodsData entryTranscription errorsUntreated psychosisOpen-source codebaseData collectionWeb-based toolEmpirically-derived, locally responsive travel time thresholds for optimal geographic supermarket access using national commuting data
Mathis W, Kahn P, Tang S, Berenbrok L, Hernandez I. Empirically-derived, locally responsive travel time thresholds for optimal geographic supermarket access using national commuting data. Journal Of Transport Geography 2024, 118: 103945. DOI: 10.1016/j.jtrangeo.2024.103945.Peer-Reviewed Original ResearchTravel time thresholdFood access researchRural blockSpatial accessibilityNew York CitySparsely populated regionsCommuting dataCensus tractsGeographic accessFood accessSupermarket accessCommunity resourcesUrban centersLos AngelesYork CityAccessibility researchUrban blocksUnited StatesRegional differencesRegion of northern CaliforniaUS DepartmentAccessCensusMethodological advancesGreat PlainsRacial and ethnic inequities in spatial access to pharmacies: A geographic information system analysis
Appolon G, Tang S, Gabriel N, Morales J, Berenbrok L, LaCroix A, Guo J, Mathis W, Hernandez I. Racial and ethnic inequities in spatial access to pharmacies: A geographic information system analysis. Journal Of The American Pharmacists Association 2024, 64: 102131. PMID: 38796160, DOI: 10.1016/j.japh.2024.102131.Peer-Reviewed Original ResearchRural-urban continuumPharmacy accessRacial/ethnic inequalitiesWhite individualsRacial/ethnic groupsSpatial accessibilityArea Deprivation IndexRural areasCensus block levelLogistic regression modelsDeprivation indexHealthcare accessHealthcare providersCommunity pharmacistsRural countiesCommunity pharmaciesCensus tractsUrban countiesResearch Triangle InstituteSuburban areasEthnic inequalitiesRacial/ethnic compositionUS regionsRural communitiesPharmacyUnderstanding Barriers and Facilitators of Primary Care Use Among Assertive Community Treatment Teams Via Qualitative Analysis of Clients and Clinicians
Zhao S, Mathis W. Understanding Barriers and Facilitators of Primary Care Use Among Assertive Community Treatment Teams Via Qualitative Analysis of Clients and Clinicians. Community Mental Health Journal 2024, 60: 1271-1282. PMID: 38702559, DOI: 10.1007/s10597-024-01284-5.Peer-Reviewed Original ResearchAssertive community treatmentPrimary care accessSevere mental illnessPrimary careCare accessMental illnessMental healthPrimary care providers' communicationPrioritization of mental healthImproving primary care accessCommunity mental health centerAssertive community treatment teamsSemi-structured qualitative interviewsReduce health disparitiesAssertive community treatment clientsPrimary care useMental health centerProvider communicationHealth disparitiesCare useSubstance use symptomsUnderstanding barriersMultifaceted barriersHealth centersSubstance use disordersAccessibility of Pulmonary Rehabilitation in the US
Kahn P, Mathis W. Accessibility of Pulmonary Rehabilitation in the US. JAMA Network Open 2024, 7: e2354867. PMID: 38315487, PMCID: PMC10844999, DOI: 10.1001/jamanetworkopen.2023.54867.Peer-Reviewed Original Research
2023
Disparities in travel time to liver transplantation centers in the United States
Ying X, Mathis W, Kahn P, Jesudian A, Fortune B, Brown R. Disparities in travel time to liver transplantation centers in the United States. Liver Transplantation 2023, 30: 326-330. PMID: 37796186, DOI: 10.1097/lvt.0000000000000280.Peer-Reviewed Original ResearchRole of independent versus chain pharmacies in providing pharmacy access: a nationwide, individual-level geographic information systems analysis
Hernandez I, Tang S, Morales J, Gabriel N, Patel N, Mathis W, Guo J, Berenbrok L. Role of independent versus chain pharmacies in providing pharmacy access: a nationwide, individual-level geographic information systems analysis. Health Affairs Scholar 2023, 1: qxad003. PMID: 37750164, PMCID: PMC10519705, DOI: 10.1093/haschl/qxad003.Peer-Reviewed Original ResearchMapping Heat Vulnerability of a Community Mental Health Center Population
Dumont C, Mathis W. Mapping Heat Vulnerability of a Community Mental Health Center Population. Community Mental Health Journal 2023, 59: 1330-1340. PMID: 37014585, DOI: 10.1007/s10597-023-01119-9.Peer-Reviewed Original ResearchConceptsMental health centersCommunity mental health centerHealth centersPatient prevalenceConnecticut Mental Health CenterHealth center populationSerious mental illnessCensus tractsMental illnessCenter populationGeocoded addressesPrevalenceStatistical significanceHeat vulnerability indexTractScoresHeat vulnerabilityNew HavenIndividualsIllnessCenter
News
News
- July 26, 2024Source: Computer Methods and Programs in Biomedicine
Inductive Thematic Analysis of Healthcare Qualitative Interviews Using Open-Source Large Language Models: How Does it Compare to Traditional Methods?
- July 26, 2024Source: Block Club Chicago
As Drugstores Close, Neighbors In Chicago’s ‘Pharmacy Deserts’ Struggle To Access Meds
- February 05, 2024Source: YaleNews
Pulmonary Rehabilitation Is Difficult for Millions of Americans to Access
- April 10, 2023Source: YaleNews
Early in Mpox Outbreak, Access to Vaccines Was Unequal Across Racial Groups