Difference Between Users and Nonusers of a Patient Portal in Health Behaviors and Outcomes: Retrospective Cohort Study

Jing Huang   ^{1 *} , PhD ;   Yong Chen   ^{1, 2, 3, 4, 5 *} , PhD ;   J Richard Landis   ¹ , PhD ;   Kevin B Mahoney   ^{1, 6} , DBA

¹ Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States

² Institute for Biomedical Informatics, University of Pennsylvania, Philadelphia, PA, United States

³ Center for Evidence-Based Practice, University of Pennsylvania, Philadelphia, PA, United States

⁴ Center for Pharmacoepidemiology Research and Training, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States

⁵ Applied Mathematics and Computational Science, University of Pennsylvania, Philadelphia, PA, United States

⁶ Richard J Fox School of Business and Management, Temple University, Philadelphia, PA, United States

*these authors contributed equally