Featured Publications
Effectiveness of Nirmatrelvir-Ritonavir Against the Development of Post-COVID-19 Conditions Among U.S. Veterans : A Target Trial Emulation.
Ioannou G, Berry K, Rajeevan N, Li Y, Mutalik P, Yan L, Bui D, Cunningham F, Hynes D, Rowneki M, Bohnert A, Boyko E, Iwashyna T, Maciejewski M, Osborne T, Viglianti E, Aslan M, Huang G, Bajema K. Effectiveness of Nirmatrelvir-Ritonavir Against the Development of Post-COVID-19 Conditions Among U.S. Veterans : A Target Trial Emulation. Annals Of Internal Medicine 2023, 176: 1486-1497. PMID: 37903369, PMCID: PMC10620954, DOI: 10.7326/m23-1394.Peer-Reviewed Original ResearchConceptsAcute COVID-19Veterans Health AdministrationUntreated comparatorsThromboembolic eventsCOVID-19Severe COVID-19Target trial emulationSARS-CoV-2Post COVID-19 conditionIndex dateVenous thromboembolismBaseline characteristicsCumulative incidencePulmonary embolismAcute infectionMedian ageOral antiviralsTrial emulationVHA careOutpatient treatmentInternational ClassificationHealth AdministrationU.S. veteransVeterans AffairsOrgan systems
2024
Development of a prediction model for 30-day COVID-19 hospitalization and death in a national cohort of Veterans Health Administration patients–March 2022—April 2023
Bui D, Bajema K, Huang Y, Yan L, Li Y, Rajeevan N, Berry K, Rowneki M, Argraves S, Hynes D, Huang G, Aslan M, Ioannou G. Development of a prediction model for 30-day COVID-19 hospitalization and death in a national cohort of Veterans Health Administration patients–March 2022—April 2023. PLOS ONE 2024, 19: e0307235. PMID: 39365775, PMCID: PMC11451987, DOI: 10.1371/journal.pone.0307235.Peer-Reviewed Original ResearchConceptsVeterans Health AdministrationCOVID-19 hospitalizationArea under the receiver operating characteristic curveComprehensive electronic health recordNational cohortElectronic health recordsAll-cause mortalityNational cohort of patientsFull modelHealth recordsHealth AdministrationReceipt of COVID-19 vaccineMortality riskEpidemiology of COVID-19COVID-19High-risk patientsBrier scoreCohort of patientsAnti-SARS-CoV-2 treatmentCOVID-19 vaccineReceiver operating characteristic curveCalibration interceptHospitalAntiviral treatmentAvailability of effective vaccinesSelf-Reported Everyday Functioning After COVID-19 Infection
Iwashyna T, Smith V, Seelye S, Bohnert A, Boyko E, Hynes D, Ioannou G, Maciejewski M, O’Hare A, Viglianti E, Berkowitz T, Pura J, Womer J, Kamphuis L, Monahan M, Bowling C, Admon A, Akgun K, Anderson S, Aslan M, Au D, Backus L, Bajema K, Baraff A, Batten L, Berkowitz T, Bernstein T, Berry Wyatt K, Bogdan J, Bosworth H, Boucher N, Burwick N, Cabrales A, Cano J, Chai W, Chen J, Cheung K, Crothers K, Curtis J, Davis M, Del Monico E, Dobalian A, Doll J, Dominitz J, Eastment M, Fan V, Ferguson J, Floyd B, Fox A, Goetz M, Govier D, Green P, Hastings S, Hauschildt K, Hawkins E, Hebert P, Helfand M, Hickok A, Horowitz D, Hough C, Hu E, Ikuta K, Jones B, Jones M, Kamphuis L, Kaufman B, Knight S, Korpak A, Korpela P, Kumbier K, Langa K, Laundry R, Lavin S, Li Y, Linquist J, McCready H, Michel M, Miles A, Milne J, Monahan M, Morelli D, Mutalik P, Naylor J, Neiderhausen M, Newell S, Nugent S, Ong M, Osborne T, Peterson M, Peterson A, Prescott H, Rajeevan N, Reddy A, Rouse M, Rowneki M, Saha S, Saini S, Shah J, Shahoumian T, Shaukat A, Shepherd-Banigan M, Showalter W, Slatore C, Smith N, Smith B, Suri P, Sussman J, Takata Y, Teo A, Thomas E, Thomas L, Tuepker A, Veigulis Z, Vig E, Vranas K, Wang X, Wicks K, Winchell K, Wong E, Woods C, Wysham K, Yan L, Zulman D. Self-Reported Everyday Functioning After COVID-19 Infection. JAMA Network Open 2024, 7: e240869. PMID: 38427352, PMCID: PMC10907923, DOI: 10.1001/jamanetworkopen.2024.0869.Peer-Reviewed Original ResearchConceptsEveryday functioningActivities of daily livingSelf-reported everyday functioningCOVID-19 infectionImpact of COVID-19 infectionDaily livingVeterans AffairsCOVID-19 cohortDocumented COVID-19Instrumental activities of daily livingMatched pairs of participantsHealth-related quality of lifePairs of participantsCohort studyProportion of veteransControl cohortLife-space mobilityStudy of veteransCohort study of veteransUS Veterans AffairsHealth-related qualityDocumented COVID-19 infectionSelf-reportTarget trial emulationQuality of lifeChanges in Outpatient Health Care Use After COVID-19 Infection Among Veterans
Hebert P, Kumbier K, Smith V, Hynes D, Govier D, Wong E, Kaufman B, Shepherd-Banigan M, Rowneki M, Bohnert A, Ioannou G, Boyko E, Iwashyna T, O’Hare A, Bowling C, Viglianti E, Maciejewski M, Admon A, Akgun K, Anderson L, Anderson S, Aslan M, Au D, Backus L, Bajema K, Baraff A, Batten L, Berkowitz T, Bernstein T, Berry Wyatt K, Bogdan J, Borgerding J, Bosworth H, Boucher N, Burwick N, Byrd K, Cabrales A, Cano J, Chai W, Chen J, Cheung K, Crothers K, Cummin G, Curtis J, Davis M, Del Monico E, Dennis P, Dobalian A, Doll J, Dominitz J, Eastment M, Fan V, Ferguson J, Floyd B, Fox A, Goetz M, Green P, Hastings S, Hauschildt K, Hawkins E, Helfand M, Hickok A, Horowitz D, Hough C, Hu E, Ikuta K, Jones B, Jones M, Kamphius L, Knight S, Korpak A, Korpela P, Langa K, Laundry R, Lavin S, Li Y, Lindquist J, McCready H, Meyer C, Michel M, Miles A, Milne J, Monahan M, Morelli D, Mutalik P, Naylor J, Niederhausen M, Newell S, Nugent S, Ong M, Osborne T, Peterson M, Peterson A, Prescott H, Pura J, Rajeevan N, Reddy A, Rouse M, Saha S, Saini S, Seelye S, Shah J, Shahoumian T, Shaukat A, Showalter W, Slatore C, Smith B, Smith N, Streja E, Suri P, Sussman J, Takata Y, Teo A, Thomas E, Thomas L, Tuepker A, Turner A, Veigulis Z, Vig E, Vranas K, Wang X, Wicks K, Winchell K, Womer J, Woods C, Wysham K, Yan L, Zulman D. Changes in Outpatient Health Care Use After COVID-19 Infection Among Veterans. JAMA Network Open 2024, 7: e2355387. PMID: 38334995, PMCID: PMC10858406, DOI: 10.1001/jamanetworkopen.2023.55387.Peer-Reviewed Original ResearchConceptsOutpatient health care useHealth care useCare useOutpatient useOutpatient visitsPrimary care visitsCounts of outpatient visitsPrimary care patientsOutpatient care utilizationCategories of careVeterans Affairs Corporate Data WarehouseCorporate Data WarehouseIncreased outpatient visitsNegative binomial regression modelsBinomial regression modelsCare visitsCare utilizationPopulation surveillance studyRetrospective cohort studyCare patientsUninfected veteransCOVID-19 infectionMain OutcomesPeri-infection periodCohort study
2023
Anti–SARS-CoV-2 Pharmacotherapies Among Nonhospitalized US Veterans, January 2022 to January 2023
Yan L, Streja E, Li Y, Rajeevan N, Rowneki M, Berry K, Hynes D, Cunningham F, Huang G, Aslan M, Ioannou G, Bajema K. Anti–SARS-CoV-2 Pharmacotherapies Among Nonhospitalized US Veterans, January 2022 to January 2023. JAMA Network Open 2023, 6: e2331249. PMID: 37651140, PMCID: PMC10472184, DOI: 10.1001/jamanetworkopen.2023.31249.Peer-Reviewed Original ResearchConceptsCOVID-19 pharmacotherapyVeterans Health AdministrationVeterans Integrated Service NetworkSARS-CoV-2Higher Charlson Comorbidity Index scoresCharlson Comorbidity Index scoreNon-Hispanic veteransComorbidity Index scoreProportion of patientsSymptomatic COVID-19Multivariable logistic regressionCOVID-19 vaccinationCohort studyMedicare databaseVHA careUS veteransMAIN OUTCOMEMedical conditionsHispanic veteransPharmacotherapyHealth AdministrationIndex scoreCommunity careNonhospitalized personsWhite veteransEffectiveness of COVID-19 Treatment With Nirmatrelvir–Ritonavir or Molnupiravir Among U.S. Veterans: Target Trial Emulation Studies With One-Month and Six-Month Outcomes
Bajema K, Berry K, Streja E, Rajeevan N, Li Y, Mutalik P, Yan L, Cunningham F, Hynes D, Rowneki M, Bohnert A, Boyko E, Iwashyna T, Maciejewski M, Osborne T, Viglianti E, Aslan M, Huang G, Ioannou G. Effectiveness of COVID-19 Treatment With Nirmatrelvir–Ritonavir or Molnupiravir Among U.S. Veterans: Target Trial Emulation Studies With One-Month and Six-Month Outcomes. Annals Of Internal Medicine 2023, 176: m22-3565. PMID: 37276589, PMCID: PMC10243488, DOI: 10.7326/m22-3565.Peer-Reviewed Original ResearchConceptsVeterans Health AdministrationCOVID-19 symptom onsetCOVID-19-related outcomesSevere COVID-19Six-month outcomesCOVID-19 vaccinationCOVID-19 treatmentCOVID-19SARS-CoV-2Percent of participantsUntreated control participantsCause mortalitySymptom onsetMedian ageOral antiviralsVHA careOutpatient treatmentHospitalizationHealth AdministrationDay 31U.S. veteransVariant transmissionMost veteransVeterans AffairsOne month
2022
A MUC5B Gene Polymorphism, rs35705950-T, Confers Protective Effects Against COVID-19 Hospitalization but Not Severe Disease or Mortality
Verma A, Minnier J, Wan ES, Huffman JE, Gao L, Joseph J, Ho YL, Wu WC, Cho K, Gorman BR, Rajeevan N, Pyarajan S, Garcon H, Meigs JB, Sun YV, Reaven PD, McGeary JE, Suzuki A, Gelernter J, Lynch JA, Petersen JM, Zekavat SM, Natarajan P, Dalal S, Jhala DN, Arjomandi M, Gatsby E, Lynch KE, Bonomo RA, Freiberg M, Pathak GA, Zhou JJ, Donskey CJ, Madduri RK, Wells QS, Huang R, Polimanti R, Chang KM, Liao KP, Tsao PS, Wilson PWF, Hung A, O’Donnell C, Gaziano JM, Hauger RL, Iyengar S, Luoh SW, Initiative T. A MUC5B Gene Polymorphism, rs35705950-T, Confers Protective Effects Against COVID-19 Hospitalization but Not Severe Disease or Mortality. American Journal Of Respiratory And Critical Care Medicine 2022, 206: 1220-1229. PMID: 35771531, PMCID: PMC9746845, DOI: 10.1164/rccm.202109-2166oc.Peer-Reviewed Original ResearchConceptsCOVID-19 hospitalizationIdiopathic pulmonary fibrosisMillion Veteran ProgramHost Genetics InitiativeAcute respiratory syndrome coronavirus 2 infectionSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infectionGene polymorphismsSyndrome coronavirus 2 infectionCoronavirus 2 infectionConfer protective effectsCOVID-19 positivityCoronavirus disease (COVID-19) infectionElectronic health recordsMVP subjectsPneumonia eventsClinical outcomesPulmonary fibrosisCOVID-19 Host Genetics InitiativeClinical eventsSevere outcomesProtective effectSevere diseaseRs35705950Disease severityMVP participantsAssociation of Kidney Comorbidities and Acute Kidney Failure With Unfavorable Outcomes After COVID-19 in Individuals With the Sickle Cell Trait
Verma A, Huffman JE, Gao L, Minnier J, Wu WC, Cho K, Ho YL, Gorman BR, Pyarajan S, Rajeevan N, Garcon H, Joseph J, McGeary JE, Suzuki A, Reaven PD, Wan ES, Lynch JA, Petersen JM, Meigs JB, Freiberg MS, Gatsby E, Lynch KE, Zekavat SM, Natarajan P, Dalal S, Jhala DN, Arjomandi M, Bonomo RA, Thompson TK, Pathak GA, Zhou JJ, Donskey CJ, Madduri RK, Wells QS, Gelernter J, Huang RDL, Polimanti R, Chang KM, Liao KP, Tsao PS, Sun YV, Wilson PWF, O’Donnell C, Hung AM, Gaziano JM, Hauger RL, Iyengar SK, Luoh SW, Muralidhar S, Beckham J, Moser J, Thomann L, Garcon H, Kosik N, Damrauer S, Assimes T, Roussos P, Striker R, Tuteja S, DuVall S, Lynch K, Gatsby E, Ramoni R, Breeling J, Huang G, Whitbourne S, Brewer J, Aslan M, Connor T, Argyres D, Stephens B, Brophy M, Humphries D, Selva L, Do N, Shayan S, Churby L, Hauser E, Zhao H, Wilson P, McArdle R, Dellitalia L, Mattocks K, Harley J, Whittle J, Jacono F, Wells J, Gutierrez S, Gibson G, Hammer K, Kaminsky L, Villareal G, Kinlay S, Xu J, Hamner M, Mathew R, Bhushan S, Iruvanti P, Godschalk M, Ballas Z, Ivins D, Mastorides S, Moorman J, Gappy S, Klein J, Ratcliffe N, Florez H, Okusaga O, Murdoch M, Sriram P, Yeh S, Tandon N, Jhala D, Aguayo S, Cohen D, Sharma S, Liangpunsakul S, Oursler K, Whooley M, Ahuja S, Constans J, Meyer P, Greco J, Rauchman M, Servatius R, Gaddy M, Wallbom A, Morgan T, Stapley T, Sherman S, Ross G, Tsao P, Strollo P, Boyko E, Meyer L, Gupta S, Huq M, Fayad J, Hung A, Lichy J, Hurley R, Robey B. Association of Kidney Comorbidities and Acute Kidney Failure With Unfavorable Outcomes After COVID-19 in Individuals With the Sickle Cell Trait. JAMA Internal Medicine 2022, 182: 796-804. PMID: 35759254, PMCID: PMC9237798, DOI: 10.1001/jamainternmed.2022.2141.Peer-Reviewed Original ResearchMeSH KeywordsAcute Kidney InjuryBlack or African AmericanCOVID-19HemoglobinsHumansKidneySickle Cell TraitConceptsAcute kidney failureSickle cell traitAssociation of SCTCOVID-19 outcomesCOVID-19 mortalityKidney diseaseKidney failureCell traitMillion Veteran ProgramCOVID-19Chronic kidney diseaseDiabetic kidney diseaseHypertensive kidney diseaseElectronic health recordsIndex dateAfrican ancestryPulmonary embolismClinical outcomesCerebrovascular diseaseMean ageUnfavorable outcomeClinical dataDiseases codesKidney morbidityMAIN OUTCOME