Longitudinal and Cohort Studies in Public Health

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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Physiological Measurements of Stress Preceding Incidents of Challenging Behavior in People With Severe to Profound Intellectual Disabilities: Longitudinal Study Protocol of Single-Case Studies

Rianne Simons, Renske Koordeman, Peter de Looff, Roy Otten

JMIR Res Protoc 2021 (Jul 21); 10(7):e24911

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Self-reported Subjective Effects of Analytically Confirmed New Psychoactive Substances Consumed by e-Psychonauts: Protocol for a Longitudinal Study Using a New Internet-Based Methodology

Marc Grifell, Guillem Mir Fuster, Mireia Ventura Vilamala, Liliana Galindo Guarín, Xoán Carbón Mallol, Carl L Hart, Víctor Pérez Sola, Francesc Colom Victoriano

JMIR Res Protoc 2021 (Jul 02); 10(7):e24433

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Directly Observed Therapy to Measure Adherence to Tuberculosis Medication in Observational Research: Protocol for a Prospective Cohort Study

Elizabeth J Ragan, Christopher J Gill, Matthew Banos, Tara C Bouton, Jennifer Rooney, Charles R Horsburgh, Robin M Warren, Bronwyn Myers, Karen R Jacobson

JMIR Res Protoc 2021 (Jun 16); 10(6):e24510

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Clustering of Unhealthy Behaviors: Protocol for a Multiple Behavior Analysis of Data From the Canadian Longitudinal Study on Aging

Zack van Allen, Simon L Bacon, Paquito Bernard, Heather Brown, Sophie Desroches, Monika Kastner, Kim Lavoie, Marta Marques, Nicola McCleary, Sharon Straus, Monica Taljaard, Kednapa Thavorn, Jennifer R Tomasone, Justin Presseau

JMIR Res Protoc 2021 (Jun 11); 10(6):e24887

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The Development of a Digital Patient-Reported Outcome Measurement for Adults With Chronic Disease (The Parsley Symptom Index): Prospective Cohort Study

Hants Williams, Sarah Steinberg, Robin Berzin

JMIR Form Res 2021 (Jun 11); 5(6):e29122

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Displayed Depression Symptoms on Facebook at Two Time Points: Content Analysis

Megan A Moreno, Quintin Gaus, Megan Wilt, Alina Arseniev-Koehler, Adrienne Ton, Molly Adrian, Ann VanderStoep

JMIR Form Res 2021 (May 31); 5(5):e20179

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The United States Chronic Thromboembolic Pulmonary Hypertension Registry: Protocol for a Prospective, Longitudinal Study

Kim M Kerr, C Greg Elliott, Raymond L Benza, Richard N Channick, Kelly M Chin, R Duane Davis, Sonia Jain, Andrea Z LaCroix, Michael M Madani, Vallerie V McLaughlin, Myung H Park, Victor F Tapson, William R Auger

JMIR Res Protoc 2021 (May 25); 10(5):e25397

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