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Use and Cost-Effectiveness of a Telehealth Service at a Centralized COVID-19 Quarantine Center in Taiwan: Cohort Study

A current report [14] indicates that the quarantine strategy is efficient in curbing the spread of COVID-19, and the cost of a quarantine strategy is lower than that of lockdown of workplaces.This cohort study reports on a model used for screening and quarantining

Yung-Feng Yen, Yi-Fan Tsai, Vincent Yi-Fong Su, Shang-Yih Chan, Wen-Ruey Yu, Hsuan Ho, Chun-Mei Hou, Chu-Chieh Chen, Lin-Chung Woung, Sheng-Jean Huang

J Med Internet Res 2020;22(12):e22703

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A Brazilian Cohort of Patients With Immuno-Mediated Chronic Inflammatory Diseases Infected by SARS-CoV-2 (ReumaCoV-Brasil Registry): Protocol for a Prospective, Observational Study

Claudia Marques, Adriana Maria Kakehasi, Ana Paula Monteiro Gomides, Eduardo Dos Santos Paiva, Edgard Torres dos Reis Neto, Gecilmara Cristina Salviato Pileggi, José Roberto Provenza, Licia Mota, Ricardo Machado Xavier, Gilda Aparecida Ferreira, Marcelo Medeiros Pinheiro

JMIR Res Protoc 2020;9(12):e24357

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Clinical Mortality in a Large COVID-19 Cohort: Observational Study

The RRT/CA cohort had a significantly higher rate of patients with diabetes (491/1112, 44.2%, versus 552/1522, 36.3%; P<.001).

Mark Jarrett, Susanne Schultz, Julie Lyall, Jason Wang, Lori Stier, Marcella De Geronimo, Karen Nelson

J Med Internet Res 2020;22(9):e23565

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Machine Learning to Predict Mortality and Critical Events in a Cohort of Patients With COVID-19 in New York City: Model Development and Validation

These patients were considered to be part of the internal validation cohort. All patients admitted to other hospitals (OH) were grouped together.

Akhil Vaid, Sulaiman Somani, Adam J Russak, Jessica K De Freitas, Fayzan F Chaudhry, Ishan Paranjpe, Kipp W Johnson, Samuel J Lee, Riccardo Miotto, Felix Richter, Shan Zhao, Noam D Beckmann, Nidhi Naik, Arash Kia, Prem Timsina, Anuradha Lala, Manish Paranjpe, Eddye Golden, Matteo Danieletto, Manbir Singh, Dara Meyer, Paul F O'Reilly, Laura Huckins, Patricia Kovatch, Joseph Finkelstein, Robert M. Freeman, Edgar Argulian, Andrew Kasarskis, Bethany Percha, Judith A Aberg, Emilia Bagiella, Carol R Horowitz, Barbara Murphy, Eric J Nestler, Eric E Schadt, Judy H Cho, Carlos Cordon-Cardo, Valentin Fuster, Dennis S Charney, David L Reich, Erwin P Bottinger, Matthew A Levin, Jagat Narula, Zahi A Fayad, Allan C Just, Alexander W Charney, Girish N Nadkarni, Benjamin S Glicksberg

J Med Internet Res 2020;22(11):e24018

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Comparison of Clinical Outcomes of Persons Living With HIV by Enrollment Status in Washington, DC: Evaluation of a Large Longitudinal HIV Cohort Study

This work has been approved by both the DC Health and George Washington University School of Public Health institutional review boards.DC Cohort StudyThe DC Cohort study is a prospective, longitudinal, observational cohort study whose primary goal is to contribute

Jenevieve Opoku, Rupali K Doshi, Amanda D Castel, Ian Sorensen, Michael Horberg, Adam Allston, Michael Kharfen, Alan E Greenberg

JMIR Public Health Surveill 2020;6(2):e16061

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Mediators of Atherosclerosis in South Asians Living in America: Use of Web-Based Methods for Follow-Up and Collection of Patient-Reported Outcome Measures

Other cohort studies, such as the Nurses’ Health Studies [16] and others, have not included in-person examinations and have relied solely on telephone and postal mail to capture data.

Namratha R Kandula, Ankita Puri-Taneja, David E Victorson, Swapna S Dave, Alka M Kanaya, Mark D Huffman

JMIR Res Protoc 2016;5(2):e95

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Comparison of On-Site Versus Remote Mobile Device Support in the Framingham Heart Study Using the Health eHeart Study for Digital Follow-up: Randomized Pilot Study Set Within an Observational Study Design

Innovative electronic cohort (e-Cohort) study designs that incorporate mHealth technology into traditional cohort studies have been proposed, minimizing the requirement of physical resources by collecting data remotely (reducing or completely eliminating in-person

Nicole L Spartano, Honghuang Lin, Fangui Sun, Kathryn L Lunetta, Ludovic Trinquart, Maureen Valentino, Emily S Manders, Mark J Pletcher, Gregory M Marcus, David D McManus, Emelia J Benjamin, Caroline S Fox, Jeffrey E Olgin, Joanne M Murabito

JMIR Mhealth Uhealth 2019;7(9):e13238

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Valuing Mobile Health: An Open-Ended Contingent Valuation Survey of a National Digital Health Program

The general UK-representative cohort consisted of 1697 respondents. On the basis of the UK general population, 48.67% (826/1697) of the cohort were male and 51.33% (871/1697) were female.

Camilla Somers, Eleanor Grieve, Marilyn Lennon, Matt-Mouley Bouamrane, Frances S Mair, Emma McIntosh

JMIR Mhealth Uhealth 2019;7(1):e3

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Achieving Synergy: Linking an Internet-Based Inflammatory Bowel Disease Cohort to a Community-Based Inception Cohort and Multicentered Cohort in Inflammatory Bowel Disease

Linking a traditional cohort with an electronic cohort offers an opportunity to derive the benefits of both cohort designs. This hybrid cohort would have the benefit of well-characterized, validated cases and biological specimens.

Bharati Kochar, Molly Aldridge, Suzanne Follan Cook, Renee Bright, Meaghan Mallette, Heather Moniz, Samir A. Shah, Neal S. LeLeiko, Jason Shapiro, Bruce E. Sands, Wenli Chen, Elizabeth Jaeger, Joseph Galanko, Millie D. Long, Christopher F. Martin, Robert S. Sandler, Michael D. Kappelman

J Med Internet Res 2016;18(6):e124

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Motives for Participating in a Web-Based Nutrition Cohort According to Sociodemographic, Lifestyle, and Health Characteristics: The NutriNet-Santé Cohort Study

The rapid and widespread increase in access to Internet has made this tool a viable and logical base for cohort studies because it presents advantages across all research stages [3,4].

Caroline Méjean, Fabien Szabo de Edelenyi, Mathilde Touvier, Emmanuelle Kesse-Guyot, Chantal Julia, Valentina A Andreeva, Serge Hercberg

J Med Internet Res 2014;16(8):e189

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