Methods to Adjust for Confounding in Test-Negative Design COVID-19 Effectiveness Studies: Simulation Study

Authors: Elizabeth AK Rowley, Patrick K Mitchell, Duck-Hye Yang, Ned Lewis, Brian E Dixon, Gabriela Vazquez-Benitez, William F Fadel, Inih J Essien, Allison L Naleway, Edward Stenehjem, Toan C Ong, Manjusha Gaglani, Karthik Natarajan, Peter Embi, Ryan E Wiegand, Ruth Link-Gelles, Mark W Tenforde, Bruce Fireman

Source: JMIR Formative Research, Vol 9, p e58981 (2025)

Subject Terms: Medicine

File Description: electronic resource

Relation: https://formative.jmir.org/2025/1/e58981; https://doaj.org/toc/2561-326X

Access URL: https://doaj.org/article/8ebae8d1856b4de58132a7b92afe85e1

A Case Demonstration of the Open Health Natural Language Processing Toolkit From the National COVID-19 Cohort Collaborative and the Researching COVID to Enhance Recovery Programs for a Natural Language Processing System for COVID-19 or Postacute Sequelae of SARS CoV-2 Infection: Algorithm Development and Validation

Authors: Andrew Wen, Liwei Wang, Huan He, Sunyang Fu, Sijia Liu, David A Hanauer, Daniel R Harris, Ramakanth Kavuluru, Rui Zhang, Karthik Natarajan, Nishanth P Pavinkurve, Janos Hajagos, Sritha Rajupet, Veena Lingam, Mary Saltz, Corey Elowsky, Richard A Moffitt, Farrukh M Koraishy, Matvey B Palchuk, Jordan Donovan, Lora Lingrey, Garo Stone-DerHagopian, Robert T Miller, Andrew E Williams, Peter J Leese, Paul I Kovach, Emily R Pfaff, Mikhail Zemmel, Robert D Pates, Nick Guthe, Melissa A Haendel, Christopher G Chute, Hongfang Liu

Source: JMIR Medical Informatics, Vol 12, p e49997 (2024)

Subject Terms: Computer applications to medicine. Medical informatics, R858-859.7

File Description: electronic resource

Relation: https://medinform.jmir.org/2024/1/e49997; https://doaj.org/toc/2291-9694

Access URL: https://doaj.org/article/95e6ed76863b48a68b9bbc6e0f59593c

Number 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 studyResearch in context

Authors: Katherine Adams, John J. Riddles, Elizabeth A.K. Rowley, Shaun J. Grannis, Manjusha Gaglani, Bruce Fireman, Emily Hartmann, Allison L. Naleway, Edward Stenehjem, Alexandria Hughes, Alexandra F. Dalton, Karthik Natarajan, Kristin Dascomb, Chandni Raiyani, Stephanie A. Irving, Chantel Sloan-Aagard, Anupam B. Kharbanda, Malini B. DeSilva, Brian E. Dixon, Toan C. Ong, Jean Keller, Monica Dickerson, Nancy Grisel, Kempapura Murthy, Juan Nanez, William F. Fadel, Sarah W. Ball, Palak Patel, Julie Arndorfer, Mufaddal Mamawala, Nimish R. Valvi, Margaret M. Dunne, Eric P. Griggs, Peter J. Embi, Mark G. Thompson, Ruth Link-Gelles, Mark W. Tenforde

Source: The Lancet Regional Health. Americas, Vol 23, Iss , Pp 100530- (2023)

Subject Terms: COVID-19, Number needed to vaccinate, mRNA vaccines, Hospitalization, Boosters, Public aspects of medicine, RA1-1270

File Description: electronic resource

Relation: http://www.sciencedirect.com/science/article/pii/S2667193X23001047; https://doaj.org/toc/2667-193X

Access URL: https://doaj.org/article/8acf40956eed4175ada422754f35470d

Contextualising 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 studyResearch in context

Authors: Erica A. Voss, Azza Shoaibi, Lana Yin Hui Lai, Clair Blacketer, Thamir Alshammari, Rupa Makadia, Kevin Haynes, Anthony G. Sena, Gowtham Rao, Sebastiaan van Sandijk, Clement Fraboulet, Laurent Boyer, Tanguy Le Carrour, Scott Horban, Daniel R. Morales, Jordi Martínez Roldán, Juan Manuel Ramírez-Anguita, Miguel A. Mayer, Marcel de Wilde, Luis H. John, Talita Duarte-Salles, Elena Roel, Andrea Pistillo, Raivo Kolde, Filip Maljković, Spiros Denaxas, Vaclav Papez, Michael G. Kahn, Karthik Natarajan, Christian Reich, Alex Secora, Evan P. Minty, Nigam H. Shah, Jose D. Posada, Maria Teresa Garcia Morales, Diego Bosca, Honorio Cadenas Juanino, Antonio Diaz Holgado, Miguel Pedrera Jiménez, Pablo Serrano Balazote, Noelia García Barrio, Selçuk Şen, Ali Yağız Üresin, Baris Erdogan, Luc Belmans, Geert Byttebier, Manu L.N.G. Malbrain, Daniel J. Dedman, Zara Cuccu, Rohit Vashisht, Atul J. Butte, Ayan Patel, Lisa Dahm, Cora Han, Fan Bu, Faaizah Arshad, Anna Ostropolets, Fredrik Nyberg, George Hripcsak, Marc A. Suchard, Dani Prieto-Alhambra, Peter R. Rijnbeek, Martijn J. Schuemie, Patrick B. Ryan

Source: EClinicalMedicine, Vol 58, Iss , Pp 101932- (2023)

Subject Terms: COVID-19, Observational research, OMOP CDM, Adverse events of special interest, Medicine (General), R5-920

File Description: electronic resource

Relation: http://www.sciencedirect.com/science/article/pii/S2589537023001098; https://doaj.org/toc/2589-5370

Access URL: https://doaj.org/article/699e462100af44ad885c8109c6df5465

A deep database of medical abbreviations and acronyms for natural language processing

Authors: Lisa Grossman Liu, Raymond H. Grossman, Elliot G. Mitchell, Chunhua Weng, Karthik Natarajan, George Hripcsak, David K. Vawdrey

Source: Scientific Data, Vol 8, Iss 1, Pp 1-9 (2021)

Subject Terms: Science

File Description: electronic resource

Relation: https://doaj.org/toc/2052-4463

Access URL: https://doaj.org/article/22f299c14aa7499aaf230bed4f8e868b

Association of Structure and Function of left atrial Appendage with Left atrial appendage Thrombus formation in patients with Rheumatic Heart Disease: ASFALT-RHD study

Authors: Karthik Natarajan, Zeeshan Mansuri, Dinesh Joshi, Anand Shukla, Vishal Sharma, Vimlesh Pandey, Sanjeev Bhatia, Krutika Patel

Source: Heart India, Vol 9, Iss 1, Pp 78-82 (2021)

Subject Terms: atrial fibrillation, left atrial appendage, rheumatic heart disease, Diseases of the circulatory (Cardiovascular) system, RC666-701

File Description: electronic resource

Relation: http://www.heartindia.net/article.asp?issn=2321-449x;year=2021;volume=9;issue=1;spage=78;epage=82;aulast=Natarajan; https://doaj.org/toc/2321-449X

Access URL: https://doaj.org/article/8adc563294d748e6965fcc4c76e27215

Deep phenotyping of 34,128 adult patients hospitalised with COVID-19 in an international network study

Authors: Edward Burn, Seng Chan You, Anthony G. Sena, Kristin Kostka, Hamed Abedtash, Maria Tereza F. Abrahão, Amanda Alberga, Heba Alghoul, Osaid Alser, Thamir M. Alshammari, Maria Aragon, Carlos Areia, Juan M. Banda, Jaehyeong Cho, Aedin C. Culhane, Alexander Davydov, Frank J. DeFalco, Talita Duarte-Salles, Scott DuVall, Thomas Falconer, Sergio Fernandez-Bertolin, Weihua Gao, Asieh Golozar, Jill Hardin, George Hripcsak, Vojtech Huser, Hokyun Jeon, Yonghua Jing, Chi Young Jung, Benjamin Skov Kaas-Hansen, Denys Kaduk, Seamus Kent, Yeesuk Kim, Spyros Kolovos, Jennifer C. E. Lane, Hyejin Lee, Kristine E. Lynch, Rupa Makadia, Michael E. Matheny, Paras P. Mehta, Daniel R. Morales, Karthik Natarajan, Fredrik Nyberg, Anna Ostropolets, Rae Woong Park, Jimyung Park, Jose D. Posada, Albert Prats-Uribe, Gowtham Rao, Christian Reich, Yeunsook Rho, Peter Rijnbeek, Lisa M. Schilling, Martijn Schuemie, Nigam H. Shah, Azza Shoaibi, Seokyoung Song, Matthew Spotnitz, Marc A. Suchard, Joel N. Swerdel, David Vizcaya, Salvatore Volpe, Haini Wen, Andrew E. Williams, Belay B. Yimer, Lin Zhang, Oleg Zhuk, Daniel Prieto-Alhambra, Patrick Ryan

Source: Nature Communications, Vol 11, Iss 1, Pp 1-11 (2020)

Subject Terms: Science

File Description: electronic resource

Relation: https://doaj.org/toc/2041-1723

Access URL: https://doaj.org/article/cfa5ce1ceb5b40e2835e784a7ff0057c

Risk Factors Associated With SARS-CoV-2 Breakthrough Infections in Fully mRNA-Vaccinated Individuals: Retrospective Analysis

Authors: Cong Liu, Junghwan Lee, Casey Ta, Ali Soroush, James R Rogers, Jae Hyun Kim, Karthik Natarajan, Jason Zucker, Yehoshua Perl, Chunhua Weng

Source: JMIR Public Health and Surveillance, Vol 8, Iss 5, p e35311 (2022)

Subject Terms: Public aspects of medicine, RA1-1270

File Description: electronic resource

Relation: https://publichealth.jmir.org/2022/5/e35311; https://doaj.org/toc/2369-2960

Access URL: https://doaj.org/article/ae4b453dd14a46a9a4ba591b3632005e

Identifying Data Quality Dimensions for Person-Generated Wearable Device Data: Multi-Method Study

Authors: Sylvia Cho, Chunhua Weng, Michael G Kahn, Karthik Natarajan

Source: JMIR mHealth and uHealth, Vol 9, Iss 12, p e31618 (2021)

Subject Terms: Information technology, T58.5-58.64, Public aspects of medicine, RA1-1270

File Description: electronic resource

Relation: https://mhealth.jmir.org/2021/12/e31618; https://doaj.org/toc/2291-5222

Access URL: https://doaj.org/article/3711470a1c544ca5b19575cb6f4ef25f

Columbia Open Health Data for COVID-19 Research: Database Analysis

Authors: Junghwan Lee, Jae Hyun Kim, Cong Liu, George Hripcsak, Karthik Natarajan, Casey Ta, Chunhua Weng

Source: Journal of Medical Internet Research, Vol 23, Iss 9, p e31122 (2021)

Subject Terms: Computer applications to medicine. Medical informatics, R858-859.7, Public aspects of medicine, RA1-1270

File Description: electronic resource

Relation: https://www.jmir.org/2021/9/e31122; https://doaj.org/toc/1438-8871

Access URL: https://doaj.org/article/8c408e82ef6240f19e2e84ea774cb3ee

Characterising the long-term clinical outcomes of 1190 hospitalised patients with COVID-19 in New York City: a retrospective case series

Authors: Michael T Yin, Ruijun Chen, George Hripcsak, Magdalena E Sobieszczyk, Sherif M Shoucri, Lawrence Purpura, Clare DeLaurentis, Matthew A Adan, Deborah A Theodore, Alexandria Lauren Irace, Shelief Y Robbins-Juarez, Apurva M Khedagi, Daniel Letchford, Amro A Harb, Lillian M Zerihun, Kate E Lee, Karen Gambina, Max C Lauring, Noah Chen, Colin P Sperring, Sanket S Mehta, Ellen L Myers, Hueyjong Shih, Michael G Argenziano, Samuel L Bruce, Cody L Slater, Jonathan R Tiao, Karthik Natarajan, Delivette Castor, Jason E Zucker

Source: BMJ Open, Vol 11, Iss 6 (2021)

Subject Terms: Medicine

File Description: electronic resource

Relation: https://bmjopen.bmj.com/content/11/6/e049488.full; https://doaj.org/toc/2044-6055

Access URL: https://doaj.org/article/7571f8dd0bfb4ce39be803f501dd3b4a

Obesity is independently associated with septic shock, renal complications, and mortality in a multiracial patient cohort hospitalized with COVID-19.

Authors: Gabrielle Page-Wilson, Rachel Arakawa, Samantha Nemeth, Fletcher Bell, Zachary Girvin, Mary-Claire Tuohy, Max Lauring, Blandine Laferrère, Gissette Reyes-Soffer, Karthik Natarajan, RuiJun Chen, Paul Kurlansky, Judith Korner

Source: PLoS ONE, Vol 16, Iss 8, p e0255811 (2021)

Subject Terms: Medicine, Science

File Description: electronic resource

Relation: https://doaj.org/toc/1932-6203

Access URL: https://doaj.org/article/f59b5e29da7b4efa99ab8b272a3663e0

High rate of renal recovery in survivors of COVID-19 associated acute renal failure requiring renal replacement therapy.

Authors: Jacob S Stevens, Kristen L King, Shelief Y Robbins-Juarez, Pascale Khairallah, Katherine Toma, Hector Alvarado Verduzco, Emily Daniel, Denzil Douglas, Andrew A Moses, Yonatan Peleg, Piotr Starakiewicz, Miah T Li, Daniel W Kim, Kathleen Yu, Long Qian, Vaqar H Shah, Max R O'Donnell, Matthew J Cummings, Jason Zucker, Karthik Natarajan, Adler Perotte, Demetra Tsapepas, Kiryluk Krzysztof, Geoffrey Dube, Eric Siddall, Shayan Shirazian, Thomas L Nickolas, Maya K Rao, Jonathan M Barasch, Anthony M Valeri, Jai Radhakrishnan, Ali G Gharavi, S Ali Husain, Sumit Mohan

Source: PLoS ONE, Vol 15, Iss 12, p e0244131 (2020)

Subject Terms: Medicine, Science

File Description: electronic resource

Relation: https://doaj.org/toc/1932-6203

Access URL: https://doaj.org/article/bc2672274f42414f94fc79b3125d70d5

Going Deep: The Role of Neural Networks for Renal Survival and Beyond

Authors: Amelia J. Averitt, Karthik Natarajan

Source: Kidney International Reports, Vol 3, Iss 2, Pp 242-243 (2018)

Subject Terms: Diseases of the genitourinary system. Urology, RC870-923

File Description: electronic resource

Relation: http://www.sciencedirect.com/science/article/pii/S2468024917304771; https://doaj.org/toc/2468-0249

Access URL: https://doaj.org/article/723e80d309c649d9a184d8dd77730716

Knowledge, awareness and attitude of eye donation among non-clinical staff of a tertiary eye hospital in South India

Authors: Narendran, Venkatapathy, Padmavathi, Sivakumar, Sangeetha, Shanmugam, Karthik, Natarajan

Source: Indian journal of ophthalmology. 70(10):3490-3495

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCvdc_100165389122.0x000001&indx=1&recIds=ETOCvdc_100165389122.0x000001

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A semidefinite optimization approach to the steady-state analysis of queueing systems.

Authors: Dimitris Bertsimas¹, Karthik Natarajan²

Source: Queueing Systems. May2007, Vol. 56 Issue 1, p27-39. 13p.

Subject Terms: *COMPUTER science research, *MARKOV processes, *RANDOM variables, *STOCHASTIC models, *MATHEMATICAL models

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