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Author Details

Karthik Natarajan
Columbia University Irving Medical Center
2007
91
27
PMIDPaper TitleJournal TitlePublished Year
37633258Clinical Epidemiology and Risk Factors for Critical Outcomes Among Vaccinated and Unvaccinated Adults Hospitalized With COVID-19-VISION Network, 10 States, June 2021-March 2023.Clin Infect Dis2024
36255273Clinical and temporal characterization of COVID-19 subgroups using patient vector embeddings of electronic health records.J Am Med Inform Assoc2023
37590187Effectiveness of Monovalent and Bivalent mRNA Vaccines in Preventing COVID-19-Associated Emergency Department and Urgent Care Encounters Among Children Aged 6 Months-5 Years - VISION Network, United States, July 2022-June 2023.MMWR Morb Mortal Wkly Rep2023
37479609Effectiveness of COVID-19 vaccines at preventing emergency department or urgent care encounters and hospitalizations among immunocompromised adults: An observational study of real-world data across 10 US states from August-December 2021.Vaccine2023
37394267Estimates of Bivalent mRNA Vaccine Durability in Preventing COVID-19-Associated Hospitalization and Critical Illness Among Adults with and Without Immunocompromising Conditions - VISION Network, September 2022-April 2023.Am J Transplant2023
37181728A metadata framework for computational phenotypes.JAMIA Open2023
37333688Number needed to vaccinate with a COVID-19 booster to prevent a COVID-19-associated hospitalization during SARS-CoV-2 Omicron BA.1 variant predominance, December 2021-February 2022, VISION Network: a retrospective cohort study.Lancet Reg Health Am2023
37034358Contextualising adverse events of special interest to characterise the baseline incidence rates in 24 million patients with COVID-19 across 26 databases: a multinational retrospective cohort study.EClinicalMedicine2023
37128466Feasibility of Linking Area Deprivation Index Data to the OMOP Common Data Model.AMIA Annu Symp Proc2023
37026401Effectiveness of BNT162b2 COVID-19 Vaccination in Children and Adolescents.Pediatrics2023
36921274Early Estimates of Bivalent mRNA Vaccine Effectiveness in Preventing COVID-19-Associated Emergency Department or Urgent Care Encounters and Hospitalizations Among Immunocompetent Adults - VISION Network, Nine States, September-November 2022.MMWR Morb Mortal Wkly Rep2023
36920396Estimation of COVID-19 mRNA Vaccine Effectiveness and COVID-19 Illness and Severity by Vaccination Status During Omicron BA.4 and BA.5 Sublineage Periods.JAMA Netw Open2023
36806690Protection From COVID-19 mRNA Vaccination and Prior SARS-CoV-2 Infection Against COVID-19-Associated Encounters in Adults During Delta and Omicron Predominance.J Infect Dis2023
36683410Vaccine Effectiveness Against Influenza-Associated Urgent Care, Emergency Department, and Hospital Encounters During the 2021-2022 Season, VISION Network.J Infect Dis2023
36935011Representing and utilizing clinical textual data for real world studies: An OHDSI approach.J Biomed Inform2023
36458881Association of Longitudinal Activity Measures and Diabetes Risk: An Analysis From the National Institutes of Health All of Us Research Program.J Clin Endocrinol Metab2023
36415904Protection of Two and Three mRNA Vaccine Doses Against Severe Outcomes Among Adults Hospitalized With COVID-19-VISION Network, August 2021 to March 2022.J Infect Dis2023
34967121Effectiveness of two-dose vaccination with mRNA COVID-19 vaccines against COVID-19-associated hospitalizations among immunocompromised adults-Nine States, January-September 2021.Am J Transplant2022
35672961Harmonization of Measurement Codes for Concept-Oriented Lab Data Retrieval.Stud Health Technol Inform2022
35345821Unraveling COVID-19: A Large-Scale Characterization of 4.5 Million COVID-19 Cases Using CHARYBDIS.Clin Epidemiol2022
35396991Comparing medical history data derived from electronic health records and survey answers in the All of Us Research Program.J Am Med Inform Assoc2022
35854725EHR Data Quality Assessment Tools and Issue Reporting Workflows for the 'All of Us' Research Program Clinical Data Research Network.AMIA Jt Summits Transl Sci Proc2022
35486806Risk Factors Associated With SARS-CoV-2 Breakthrough Infections in Fully mRNA-Vaccinated Individuals: Retrospective Analysis.JMIR Public Health Surveill2022
35862287Effectiveness of 2, 3, and 4 COVID-19 mRNA Vaccine Doses Among Immunocompetent Adults During Periods when SARS-CoV-2 Omicron BA.1 and BA.2/BA.2.12.1 Sublineages Predominated - VISION Network, 10 States, December 2021-June 2022.MMWR Morb Mortal Wkly Rep2022
35358170Effectiveness of Homologous and Heterologous COVID-19 Booster Doses Following 1 Ad.26.COV2.S (Janssen [Johnson & Johnson]) Vaccine Dose Against COVID-19-Associated Emergency Department and Urgent Care Encounters and Hospitalizations Among Adults - VISION Network, 10 States, December 2021-March 2022.MMWR Morb Mortal Wkly Rep2022
36580430Early Estimates of Bivalent mRNA Vaccine Effectiveness in Preventing COVID-19-Associated Emergency Department or Urgent Care Encounters and Hospitalizations Among Immunocompetent Adults - VISION Network, Nine States, September-November 2022.MMWR Morb Mortal Wkly Rep2022
36106377Identification of patients with drug-resistant epilepsy in electronic medical record data using the Observational Medical Outcomes Partnership Common Data Model.Epilepsia2022
36173371An interactive fitness-for-use data completeness tool to assess activity tracker data.J Am Med Inform Assoc2022
36264840Effectiveness of COVID-19 mRNA Vaccines Against COVID-19-Associated Hospitalizations Among Immunocompromised Adults During SARS-CoV-2 Omicron Predominance - VISION Network, 10 States, December 2021-August 2022.MMWR Morb Mortal Wkly Rep2022
36191948Waning of vaccine effectiveness against moderate and severe covid-19 among adults in the US from the VISION network: test negative, case-control study.BMJ2022
36156146Estimation of COVID-19 mRNA Vaccine Effectiveness Against Medically Attended COVID-19 in Pregnancy During Periods of Delta and Omicron Variant Predominance in the United States.JAMA Netw Open2022
36216933Association of step counts over time with the risk of chronic disease in the All of Us Research Program.Nat Med2022
35276502Patient characteristics and antiseizure medication pathways in newly diagnosed epilepsy: Feasibility and pilot results using the common data model in a single-center electronic medical record database.Epilepsy Behav2022
35239634Effectiveness of COVID-19 Pfizer-BioNTech BNT162b2 mRNA Vaccination in Preventing COVID-19-Associated Emergency Department and Urgent Care Encounters and Hospitalizations Among Nonimmunocompromised Children and Adolescents Aged 5-17 Years - VISION Network, 10 States, April 2021-January 2022.MMWR Morb Mortal Wkly Rep2022
35176007Waning 2-Dose and 3-Dose Effectiveness of mRNA Vaccines Against COVID-19-Associated Emergency Department and Urgent Care Encounters and Hospitalizations Among Adults During Periods of Delta and Omicron Variant Predominance - VISION Network, 10 States, August 2021-January 2022.MMWR Morb Mortal Wkly Rep2022
35085224Effectiveness of a Third Dose of mRNA Vaccines Against COVID-19-Associated Emergency Department and Urgent Care Encounters and Hospitalizations Among Adults During Periods of Delta and Omicron Variant Predominance - VISION Network, 10 States, August 2021-January 2022.MMWR Morb Mortal Wkly Rep2022
32805036The National COVID Cohort Collaborative (N3C): Rationale, design, infrastructure, and deployment.J Am Med Inform Assoc2021
33739294Factors Affecting the Quality of Person-Generated Wearable Device Data and Associated Challenges: Rapid Systematic Review.JMIR Mhealth Uhealth2021
33706377Development and validation of prediction models for mechanical ventilation, renal replacement therapy, and readmission in COVID-19 patients.J Am Med Inform Assoc2021
33725121COVID-19 in patients with autoimmune diseases: characteristics and outcomes in a multinational network of cohorts across three countries.Rheumatology (Oxford)2021
33749656Clinical Features and Outcomes of Patients with Dementia Compared to an Aging Cohort Hospitalized During the Initial New York City COVID-19 Wave.J Alzheimers Dis2021
33688639Unraveling COVID-19: a large-scale characterization of 4.5 million COVID-19 cases using CHARYBDIS.Res Sq2021
34941540Identifying Data Quality Dimensions for Person-Generated Wearable Device Data: Multi-Method Study.JMIR Mhealth Uhealth2021
34911126Effect of Electronic Health Record Reminders for Routine Immunizations and Immunizations Needed for Chronic Medical Conditions.Appl Clin Inform2021
34529642Interim Estimates of COVID-19 Vaccine Effectiveness Against COVID-19-Associated Emergency Department or Urgent Care Clinic Encounters and Hospitalizations Among Adults During SARS-CoV-2 B.1.617.2 (Delta) Variant Predominance - Nine States, June-August 2021.MMWR Morb Mortal Wkly Rep2021
34383798Obesity is independently associated with septic shock, renal complications, and mortality in a multiracial patient cohort hospitalized with COVID-19.PLoS One2021
34735426Effectiveness of 2-Dose Vaccination with mRNA COVID-19 Vaccines Against COVID-19-Associated Hospitalizations Among Immunocompromised Adults - Nine States, January-September 2021.MMWR Morb Mortal Wkly Rep2021
34735425Laboratory-Confirmed COVID-19 Among Adults Hospitalized with COVID-19-Like Illness with Infection-Induced or mRNA Vaccine-Induced SARS-CoV-2 Immunity - Nine States, January-September 2021.MMWR Morb Mortal Wkly Rep2021
34496194Effectiveness of Covid-19 Vaccines in Ambulatory and Inpatient Care Settings.N Engl J Med2021
34642696A Retrospective Analysis of COVID-19 mRNA Vaccine Breakthrough Infections - Risk Factors and Vaccine Effectiveness.medRxiv2021
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Co-authored papers 24
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Stanford University
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Erasmus University Medical Center
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Co-authored papers 10
Universidad del Norte
Co-authored papers 10
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University of Utah Health
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University of Oxford
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University of Utah
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