Longitudinal and Cohort Studies in Public Health

Problems in Coordinating and Accessing Primary Care for Attached and Unattached Patients Exacerbated During the COVID-19 Pandemic Year (the PUPPY Study): Protocol for a Longitudinal Mixed Methods Study

Emily Gard Marshall, Mylaine Breton, Benoit Cossette, Jennifer Isenor, Maria Mathews, Caitlyn Ayn, Mélanie Ann Smithman, David Stock, Eliot Frymire, Lynn Edwards, Michael Green

JMIR Res Protoc 2021 (Oct 13); 10(10):e29984

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International Changes in COVID-19 Clinical Trajectories Across 315 Hospitals and 6 Countries: Retrospective Cohort Study

Griffin M Weber, Harrison G Zhang, Sehi L'Yi, Clara-Lea Bonzel, Chuan Hong, Paul Avillach, Alba Gutiérrez-Sacristán, Nathan P Palmer, Amelia Li Min Tan, Xuan Wang, William Yuan, Nils Gehlenborg, Anna Alloni, Danilo F Amendola, Antonio Bellasi, Riccardo Bellazzi, Michele Beraghi, Mauro Bucalo, Luca Chiovato, Kelly Cho, Arianna Dagliati, Hossein Estiri, Robert W Follett, Noelia García Barrio, David A Hanauer, Darren W Henderson, Yuk-Lam Ho, John H Holmes, Meghan R Hutch, Ramakanth Kavuluru, Katie Kirchoff, Jeffrey G Klann, Ashok K Krishnamurthy, Trang T Le, Molei Liu, Ne Hooi Will Loh, Sara Lozano-Zahonero, Yuan Luo, Sarah Maidlow, Adeline Makoudjou, Alberto Malovini, Marcelo Roberto Martins, Bertrand Moal, Michele Morris, Danielle L Mowery, Shawn N Murphy, Antoine Neuraz, Kee Yuan Ngiam, Marina P Okoshi, Gilbert S Omenn, Lav P Patel, Miguel Pedrera Jiménez, Robson A Prudente, Malarkodi Jebathilagam Samayamuthu, Fernando J Sanz Vidorreta, Emily R Schriver, Petra Schubert, Pablo Serrano Balazote, Byorn WL Tan, Suzana E Tanni, Valentina Tibollo, Shyam Visweswaran, Kavishwar B Wagholikar, Zongqi Xia, Daniela Zöller, The Consortium For Clinical Characterization Of COVID-19 By EHR (4CE), Isaac S Kohane, Tianxi Cai, Andrew M South, Gabriel A Brat

J Med Internet Res 2021 (Oct 11); 23(10):e31400

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Statin Use and COVID-19 Infectivity and Severity in South Korea: Two Population-Based Nationwide Cohort Studies

Seung Won Lee, So Young Kim, Sung Yong Moon, In Kyung Yoo, Eun-Gyong Yoo, Gwang Hyeon Eom, Jae-Min Kim, Jae Il Shin, Myung Ho Jeong, Jee Myung Yang, Dong Keon Yon

JMIR Public Health Surveill 2021 (Oct 08); 7(10):e29379

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Using a Constraint-Based Method to Identify Chronic Disease Patients Who Are Apt to Obtain Care Mostly Within a Given Health Care System: Retrospective Cohort Study

Yao Tong, Zachary C Liao, Peter Tarczy-Hornoch, Gang Luo

JMIR Form Res 2021 (Oct 07); 5(10):e26314

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The COVID-19 Study of Healthcare and Support Personnel (CHAMPS): Protocol for a Longitudinal Observational Study

Peter G Kaufmann, Donna S Havens, Janell L Mensinger, Patricia K Bradley, Heather M Brom, Linda C Copel, Alexander Costello, Christine D'Annunzio, Jennifer Dean Durning, Linda Maldonado, Ann Barrow McKenzie, Suzanne C Smeltzer, Jennifer Yost, CHAMPS Study Investigators

JMIR Res Protoc 2021 (Oct 07); 10(10):e30757

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Exploring the Well-being of Health Care Workers During the COVID-19 Pandemic: Protocol for a Prospective Longitudinal Study

Jenny J W Liu, Anthony Nazarov, Rachel A Plouffe, Callista A Forchuk, Erisa Deda, Dominic Gargala, Tri Le, Jesse Bourret-Gheysen, Vanessa Soares, Maede S Nouri, Fardous Hosseiny, Patrick Smith, Maya Roth, Arlene G MacDougall, Michelle Marlborough, Rakesh Jetly, Alexandra Heber, Joy Albuquerque, Ruth Lanius, Ken Balderson, Gabrielle Dupuis, Viraj Mehta, J Don Richardson

JMIR Res Protoc 2021 (Sep 27); 10(9):e32663

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Understanding Patterns of Healthy Aging Among Men Who Have Sex With Men: Protocol for an Observational Cohort Study

James E Egan, Sabina A Haberlen, Steven Meanley, Deanna Ware, Andre L Brown, Daniel Siconolfi, Mark Brennan-Ing, Ron Stall, Michael W Plankey, M Reuel Friedman

JMIR Res Protoc 2021 (Sep 23); 10(9):e25750

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Clinical, Laboratory, and Imaging Features of COVID-19 in a Cohort of Patients: Cross-Sectional Comparative Study

Rami Qaisieh, Mohammad Al-Tamimi, Naser El-Hammuri, Marwan Shalabi, Muna M Kilani, Hana Taha, Abdallah Al-Muhtaseb, Ibrahim Alfarrajin, Marwan Abu Shaqra, Almothana Hamdan

JMIR Public Health Surveill 2021 (Sep 21); 7(9):e28005

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Evaluation of a Commercial Mobile Health App for Depression and Anxiety (AbleTo Digital+): Retrospective Cohort Study

Margaret T Anton, Heidi Mochari Greenberger, Evie Andreopoulos, Reena L Pande

JMIR Form Res 2021 (Sep 21); 5(9):e27570

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Exploring Associations of Housing, Relocation, and Active and Healthy Aging in Sweden: Protocol for a Prospective Longitudinal Mixed Methods Study

Magnus Zingmark, Jonas Björk, Marianne Granbom, Giedre Gefenaite, Frida Nordeström, Steven M Schmidt, Taina Rantanen, Björn Slaug, Susanne Iwarsson

JMIR Res Protoc 2021 (Sep 21); 10(9):e31137

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Using Machine Learning Techniques to Predict Factors Contributing to the Incidence of Metabolic Syndrome in Tehran: Cohort Study

Firoozeh Hosseini-Esfahani, Behnaz Alafchi, Zahra Cheraghi, Amin Doosti-Irani, Parvin Mirmiran, Davood Khalili, Fereidoun Azizi

JMIR Public Health Surveill 2021 (Sep 02); 7(9):e27304

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The Impact of COVID-19–Related Restrictions on Social and Daily Activities of Parents, People With Disabilities, and Older Adults: Protocol for a Longitudinal, Mixed Methods Study

Holly Reid, William Cameron Miller, Elham Esfandiari, Somayyeh Mohammadi, Isabelle Rash, Gordon Tao, Ethan Simpson, Kai Leong, Parmeet Matharu, Brodie Sakakibara, Julia Schmidt, Tal Jarus, Susan Forwell, Jaimie Borisoff, Catherine Backman, Adam Alic, Emily Brooks, Janice Chan, Elliott Flockhart, Jessica Irish, Chihori Tsukura, Nicole Di Spirito, William Ben Mortenson

JMIR Res Protoc 2021 (Sep 01); 10(9):e28337

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Online Search Trends Influencing Anticoagulation in Patients With COVID-19: Observational Study

Amy P Worrall, Claire Kelly, Aine O'Neill, Murray O'Doherty, Eoin Kelleher, Anne Marie Cushen, Cora McNally, Samuel McConkey, Siobhan Glavey, Michelle Lavin, Eoghan de Barra

JMIR Form Res 2021 (Aug 31); 5(8):e21817

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The COVID-19 Citizen Science Study: Protocol for a Longitudinal Digital Health Cohort Study

Alexis L Beatty, Noah D Peyser, Xochitl E Butcher, Thomas W Carton, Jeffrey E Olgin, Mark J Pletcher, Gregory M Marcus

JMIR Res Protoc 2021 (Aug 30); 10(8):e28169

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Internet-Based HIV Self-Testing Among Men Who Have Sex With Men Through Pre-exposure Prophylaxis: 3-Month Prospective Cohort Analysis From China

Jing Zhang, Joseph Tucker, Weiming Tang, Hongyi Wang, Zhenxing Chu, Qinghai Hu, Xiaojie Huang, Yaokai Chen, Hui Wang, Xiaoqing He, Yao Li, Lukun Zhang, Zhili Hu, Rantong Bao, Shangcao Li, Hang Li, Haibo Ding, Yongjun Jiang, Wenqing Geng, Junjie Xu, Hong Shang

J Med Internet Res 2021 (Aug 27); 23(8):e23978

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Variations in Patients’ Overall Assessment of Their Health Across and Within Disease Groups Using the EQ-5D Questionnaire: Protocol for a Longitudinal Study in the Swedish National Quality Registers

Fitsum Sebsibe Teni, Ola Rolfson, Nancy Devlin, David Parkin, Emma Nauclér, Kristina Burström, The Swedish Quality Register (SWEQR) Study Group

JMIR Res Protoc 2021 (Aug 27); 10(8):e27669

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Evaluation of the Prevalence, Regional Phenotypic Variation, Comorbidities, Risk Factors, and Variations in Response to Different Therapeutic Modalities Among Indian Women: Proposal for the Indian Council of Medical Research–Polycystic Ovary Syndrome (ICMR–PCOS) Study

Mohd Ashraf Ganie, Subhankar Chowdhury, Vanita Suri, Beena Joshi, Prasanta Kumar Bhattacharya, Sarita Agrawal, Neena Malhotra, Rakesh Sahay, Roya Rozati, Puthiyaveettil Khadar Jabbar, Vishnubhatla Sreenivas, Mukesh Sriwastva, Imtiyaz Ahmad Wani, Shalini Singh, Radhey Shyam Sharma

JMIR Res Protoc 2021 (Aug 27); 10(8):e23437

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Using a Convolutional Neural Network to Predict Remission of Diabetes After Gastric Bypass Surgery: Machine Learning Study From the Scandinavian Obesity Surgery Register

Yang Cao, Ingmar Näslund, Erik Näslund, Johan Ottosson, Scott Montgomery, Erik Stenberg

JMIR Med Inform 2021 (Aug 19); 9(8):e25612

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Obesity and BMI Cut Points for Associated Comorbidities: Electronic Health Record Study

Natalie Liu, Jen Birstler, Manasa Venkatesh, Lawrence Hanrahan, Guanhua Chen, Luke Funk

J Med Internet Res 2021 (Aug 09); 23(8):e24017

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Turn on, Tune in, and Drop out: Predictors of Attrition in a Prospective Observational Cohort Study on Psychedelic Use

Sebastian Hübner, Eline Haijen, Mendel Kaelen, Robin Lester Carhart-Harris, Hannes Kettner

J Med Internet Res 2021 (Jul 28); 23(7):e25973

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