Thomas Thornhill IV
Research Associate 2, HSSCards
About
Research
Publications
2026
Travel Time to Methadone Treatment Via Personal Vehicle vs Public Transit
Howell B, Kim J, Thornhill T, Lee J, Biegacki E, Grau L, Fiellin D, Heimer R, Gonsalves G. Travel Time to Methadone Treatment Via Personal Vehicle vs Public Transit. JAMA Network Open 2026, 9: e2557361. PMID: 41632474, PMCID: PMC12869344, DOI: 10.1001/jamanetworkopen.2025.57361.Peer-Reviewed Original ResearchPublic transitPersonal vehiclesTravel timeCar ownershipPublic transit travel timesPublic transit accessibilityTransit travel timeLow car ownershipSpatial weight matrixSpatial error modelMedian travel timeTransit accessibilityTransport modesTravelRural designationStudy of barriersGeospatial analysisOwnershipVehicleUrban-rural gradientState of ConnecticutWhite residentsDesignPolicy changesCar
2025
Enduring Outcomes of COVID-19 Work Absences on the US Labor Market
Dennett J, Soltas E, Goda G, Thornhill T, Werner K, Gonsalves G. Enduring Outcomes of COVID-19 Work Absences on the US Labor Market. JAMA Network Open 2025, 8: e2536635. PMID: 41071553, PMCID: PMC12514624, DOI: 10.1001/jamanetworkopen.2025.36635.Peer-Reviewed Original ResearchConceptsHealth-related absenceWork absenceUS labor marketEndurance outcomesCohort studyEducational attainmentCenters for Disease Control and PreventionNon-Hispanic blacksLabor forceLabor marketDisease Control and PreventionPublic health emergency declarationCOVID-19 pandemicImpact of public health crisesAdverse outcomesControl and PreventionLabor force participationCurrent Population SurveyLabor market dataPublic health crisisNon-HispanicState-level dataMain OutcomesUS populationMonth fixed effects
2024
Integrating testing volume into bandit algorithms for infectious disease surveillance
Warren J, Prunas O, Paltiel A, Thornhill T, Gonsalves G. Integrating testing volume into bandit algorithms for infectious disease surveillance. Journal Of The Royal Statistical Society Series A (Statistics In Society) 2024, 188: 1029-1043. PMID: 41064740, PMCID: PMC12503114, DOI: 10.1093/jrsssa/qnae090.Peer-Reviewed Original ResearchThe Painful Total Knee Arthroplasty
Azer N, Thornhill T, Kim A. The Painful Total Knee Arthroplasty. 2024, 27-40. DOI: 10.1007/978-3-031-61980-9_3.Peer-Reviewed Original ResearchAccessibility of Opioid Treatment Programs Based on Conventional vs Perceived Travel Time Measures
Kim J, Lee J, Thornhill T, Dennett J, Lu H, Howell B, Grau L, Fiellin D, Heimer R, Gonsalves G. Accessibility of Opioid Treatment Programs Based on Conventional vs Perceived Travel Time Measures. JAMA Network Open 2024, 7: e240209. PMID: 38376839, PMCID: PMC10879949, DOI: 10.1001/jamanetworkopen.2024.0209.Peer-Reviewed Original ResearchConceptsTransit travel timeAccessibility metricsTravel timeTravel componentsAccessibility scoresTransportation burdenTravel burdenOut-of-vehicleComponents of travelConventional accessibility measuresSpatial regression modelsTravel time measurementsPublic transitTransit schedulesAccessibility measuresDeparture timeTravel time analysisTrip durationTravelOperating hoursTime analysisCross-sectional studyOpioid use disorderPolicy recommendationsDecision-making
2023
Using Bandit Algorithms to Maximize SARS-CoV-2 Case-Finding: Evaluation and Feasibility Study
Rayo M, Faulkner D, Kline D, Thornhill T, Malloy S, Della Vella D, Morey D, Zhang N, Gonsalves G. Using Bandit Algorithms to Maximize SARS-CoV-2 Case-Finding: Evaluation and Feasibility Study. JMIR Public Health And Surveillance 2023, 9: e39754. PMID: 37581924, PMCID: PMC10430782, DOI: 10.2196/39754.Peer-Reviewed Original ResearchTrusted residents and housing assistance to decrease violence exposure in New Haven (TRUE HAVEN): a strengths-based and community-driven stepped-wedge intervention to reduce gun violence
Tong G, Spell V, Horton N, Thornhill T, Keene D, Montgomery C, Spiegelman D, Wang E, Roy B. Trusted residents and housing assistance to decrease violence exposure in New Haven (TRUE HAVEN): a strengths-based and community-driven stepped-wedge intervention to reduce gun violence. BMC Public Health 2023, 23: 1545. PMID: 37580653, PMCID: PMC10426138, DOI: 10.1186/s12889-023-15997-x.Peer-Reviewed Original ResearchConceptsGun violenceHousing assistanceStructural racismHousing stabilityViolence exposureMulti-level interventionsCommunity gun violenceMulti-stakeholder coalitionsRental assistance programsCommunity-based organizationsHousing supportPolicy changesFinancial educationStable housingBeing of individualsViolenceTarget neighborhoodsCommunity membersNew HavenNeighborhood ratesAssistance programsOrganization leadersRacismHavenNeighborhoodThe Association of Sacro-Femoro-Pubic Angle and Postoperative Dislocation Following Total Hip Arthroplasty
Roy A, Carrier C, Schwab P, Thornhill T, Losina E, Chen A, Katz J, Lange J. The Association of Sacro-Femoro-Pubic Angle and Postoperative Dislocation Following Total Hip Arthroplasty. The Journal Of Arthroplasty 2023, 38: 2630-2633. PMID: 37279846, DOI: 10.1016/j.arth.2023.05.074.Peer-Reviewed Original ResearchConceptsAP pelvis radiographsPelvis radiographsConditional logistic regressionAntero-posteriorCase-control studyPelvic tiltTotal hip arthroplastyRetrospective case-control studySFP angleLogistic regressionAmerican Society of Anesthesiologists classificationAmerican SocietyStatistically significant differenceAcademic centersHip arthroplastyMeasure lateralizationRadiographsAssociationPatterns of Infectious Disease Associated With Injection Drug Use in Massachusetts
Gonsalves G, Paltiel A, Thornhill T, DeMaria A, Cranston K, Klevens R, Warren J. Patterns of Infectious Disease Associated With Injection Drug Use in Massachusetts. Clinical Infectious Diseases 2023, 76: 2134-2139. PMID: 36757712, PMCID: PMC10273381, DOI: 10.1093/cid/ciad073.Peer-Reviewed Original ResearchConceptsSoft tissue infectionsHuman immunodeficiency virusHepatitis C virusInjection drug useHCV casesInfective endocarditisHIV casesDrug useSubstance use disordersLogistic regression modelsClinical sequalaeSSTI casesPublic health crisisTissue infectionsImmunodeficiency virusDisease AssociatedHIV outbreakAbscess incisionC virusUse disordersInfectious diseasesInfectionMultiple outbreaksMedical proceduresSuch associations
2022
Estimating deaths averted and cost per life saved by scaling up mRNA COVID-19 vaccination in low-income and lower-middle-income countries in the COVID-19 Omicron variant era: a modelling study
Savinkina A, Bilinski A, Fitzpatrick M, Paltiel AD, Rizvi Z, Salomon J, Thornhill T, Gonsalves G. Estimating deaths averted and cost per life saved by scaling up mRNA COVID-19 vaccination in low-income and lower-middle-income countries in the COVID-19 Omicron variant era: a modelling study. BMJ Open 2022, 12: e061752. PMID: 36100306, PMCID: PMC9471205, DOI: 10.1136/bmjopen-2022-061752.Peer-Reviewed Original ResearchConceptsLow-income countriesIncome countriesDeath avertedHigh-income nationsStatistical lifeAvertable deathsIncome nationsCOVID-19 deathsReasonable investmentHigh costKey inputCountriesParameter estimatesAvertedCostSensitivity analysisUniversal vaccinationGlobal vaccinationMRNA COVID-19 vaccinationNationsInvestmentPrimary vaccine seriesLow vaccine effectivenessCOVID-19 vaccinationPublic data