Christopher Morrison
Associate Professor of Epidemiology (Chronic Diseases)Cards
About
Research
Publications
Featured Publications
Defining Spatial Epidemiology: A Systematic Review and Re-orientation
Morrison C, Mair C, Bates L, Duncan D, Branas C, Bushover B, Mehranbod C, Gobaud A, Uong S, Forrest S, Roberts L, Rundle A. Defining Spatial Epidemiology: A Systematic Review and Re-orientation. Epidemiology 2024, 35: 542-555. PMID: 38534176, PMCID: PMC11196201, DOI: 10.1097/ede.0000000000001738.Peer-Reviewed Original ResearchConceptsSubfield of epidemiologyAnalytical ecological studySystematic reviewSpatial epidemiologyRisk Factors StudySystematic review of studiesCausal inferenceDescriptive epidemiologyExcluded articlesReview of studiesDescriptive studyEcological studiesIntervention studiesInclusion criteriaDemonstration studyContemporary epidemiologyEpidemiologyAnalytical studyInterventionUnits of analysisStatisticallyPubMedCurrent focusReviewStudyChanges in Shooting Incidence in Philadelphia, Pennsylvania, Between March and November 2020
Beard J, Jacoby S, Maher Z, Dong B, Kaufman E, Goldberg A, Morrison C. Changes in Shooting Incidence in Philadelphia, Pennsylvania, Between March and November 2020. JAMA 2021, 325: 1327-1328. PMID: 33566087, PMCID: PMC7876621, DOI: 10.1001/jama.2021.1534.Peer-Reviewed Original ResearchRide-Hailing and Road Traffic Crashes: A Critical Review
Morrison C, Kirk D, Brazil N, Humphreys D. Ride-Hailing and Road Traffic Crashes: A Critical Review. American Journal Of Epidemiology 2022, 191: 751-758. PMID: 35179205, PMCID: PMC9431654, DOI: 10.1093/aje/kwac033.Peer-Reviewed Original ResearchConceptsRoad traffic crash injuriesRide-hailingTraffic crash injuriesCrash injuriesRoad-user typeRide-hailing businessVehicular traffic flowHeterogeneous impactsRoad traffic crashesTraffic flowTraffic crashesSource of moderationRoad trafficTraffic useWell-developed theoryRoadCrashesInnovative solutionsMixed resultsEvent-level characteristicsHuman mobilityMethodological challengesTheoretical modelLyftBusinessThe enduring impact of historical and structural racism on urban violence in Philadelphia
Jacoby S, Dong B, Beard J, Wiebe D, Morrison C. The enduring impact of historical and structural racism on urban violence in Philadelphia. Social Science & Medicine 2017, 199: 87-95. PMID: 28579093, PMCID: PMC7437144, DOI: 10.1016/j.socscimed.2017.05.038.Peer-Reviewed Original ResearchConceptsHome Owners’ Loan CorporationViolent crimeEmpirical spatial analysisHistorical census dataHome Owners' Loan Corporation mapsPublic health approachSocio-ecological contextInformal housingUrban violenceBlack residentsSocio-demographic factorsEconomic developmentMortgage lendingCensus dataFirearm assaultsStructural racismCrimeRacial discriminationViolencePhysical placeEvidence of declineHealth approachFirearm injury ratesHistorical perspectiveUndesired populationAssessing the Gun Violence Archive as an Epidemiologic Data Source for Community Firearm Violence in 4 US Cities
Gobaud A, Mehranbod C, Kaufman E, Jay J, Beard J, Jacoby S, Branas C, Bushover B, Morrison C. Assessing the Gun Violence Archive as an Epidemiologic Data Source for Community Firearm Violence in 4 US Cities. JAMA Network Open 2023, 6: e2316545. PMID: 37266937, PMCID: PMC10238941, DOI: 10.1001/jamanetworkopen.2023.16545.Peer-Reviewed Original ResearchConceptsGun Violence ArchiveFirearm violenceCity Police DepartmentPolice department dataFirearm homicideNonfatal shootingsPolice departmentsInterpersonal violenceShooting dataNational data sourcesViolenceShooting eventsFirearm injuriesPoliceUS CensusUS citiesCharacteristics of individualsFirearmGunSources of dataCityApparent biasDepartment dataCommunityHomicide
2025
Exploring modifiable neighborhood risk factors for fatal opioid overdose: a case–control study in two US cities
Nesoff E, Morrison C, Wiebe D, Martins S. Exploring modifiable neighborhood risk factors for fatal opioid overdose: a case–control study in two US cities. American Journal Of Epidemiology 2025, kwaf152. PMID: 40668203, PMCID: PMC12296151, DOI: 10.1093/aje/kwaf152.Peer-Reviewed Original ResearchNeighborhood risk factorsNeighborhood-level covariatesTraffic calming featuresFatal opioid overdoseNeighborhood factorsGoogle Street ViewSamples of blocksSidewalk maintenanceNew York CityMultifamily homesUS citiesFamily homeApartment buildingsBus stopOpioid overdoseVacant lotsCity blocksYork CityStreet ViewStreetRisk factorsCityNeighborhoodBuildingCase sitesEffectiveness of leading pedestrian intervals for city walkers’ safety
Zadey S, Roberts L, Bushover B, Gobaud A, Mehranbod C, Fish C, Eschliman E, Gao X, Goin D, Morrison C. Effectiveness of leading pedestrian intervals for city walkers’ safety. Nature Cities 2025, 2: 608-612. DOI: 10.1038/s44284-025-00267-1.Peer-Reviewed Original ResearchFirearm Control Regulations and Firearm-related Mortality: A Cross-National Ecological Study
Zadey S, Roberts L, Bushover B, Whalen A, Mehranbod C, Chihuri S, Eschliman E, Morrison C. Firearm Control Regulations and Firearm-related Mortality: A Cross-National Ecological Study. American Journal Of Epidemiology 2025, kwaf141. PMID: 40607687, PMCID: PMC12382363, DOI: 10.1093/aje/kwaf141.Peer-Reviewed Original ResearchAssociation between police funding and community firearm violence incidence in 61 US cities, 2015–2022
Wamakima A, Roberts L, Wanders S, Morrison C, Kaufman E, Cook M, Beard J. Association between police funding and community firearm violence incidence in 61 US cities, 2015–2022. Public Health 2025, 246: 105841. PMID: 40578272, DOI: 10.1016/j.puhe.2025.105841.Peer-Reviewed Original ResearchConceptsPolice fundingPolice expendituresUnited StatesGun Violence ArchiveViolence incidentsPoliceCity budgetFirearm violenceUS citiesShooting dataPanel analysisShooting rateSocial factorsCityFundingOne-year lagExpenditureViolenceMixed-effects regressionStateCommunityInvestmentNo significant associationUnitsEffects modelExtreme Heat and Firearm Violence in New York City Public Housing: The Mitigating Role of Air Conditioning
Roberts L, Bushover B, Mehranbod C, Eschliman E, Fish C, Zadey S, Morrison C. Extreme Heat and Firearm Violence in New York City Public Housing: The Mitigating Role of Air Conditioning. Journal Of Urban Health 2025, 102: 344-351. PMID: 40106209, PMCID: PMC12031712, DOI: 10.1007/s11524-025-00969-w.Peer-Reviewed Original ResearchConceptsNew York City Housing AuthorityFirearm violenceNew York CityPublic housingCity Housing AuthorityEcological cross-sectional studyRates of firearm violenceReduce firearm violenceElectricity consumptionHousing AuthorityArea Deprivation IndexMitigation roleViolenceDeprivation indexIncreased electricity consumptionShooting incidentsDisproportionate ratesHousingYork CityShooting eventsUrban areasUnited StatesFirearmTop decileDecile
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