Electronic Health Record–Based Recruitment and Retention and Mobile Health App Usage: Multisite Cohort Study

Janelle W Coughlin   ^{1, 2} , PhD ;   Lindsay M Martin   ³ , MSc ;   Di Zhao   ^{2, 4} , PhD ;   Attia Goheer   ⁴ , PhD ;   Thomas B Woolf   ⁵ , PhD ;   Katherine Holzhauer   ³ , BA ;   Harold P Lehmann   ³ , MD, PhD ;   Michelle R Lent   ⁶ , PhD ;   Kathleen M McTigue   ⁷ , MPH, MD ;   Jeanne M Clark   ^{2, 3} , MD ;   Wendy L Bennett   ^{2, 3} , MPH, MD

¹ Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, United States

² Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins University, Baltimore, MD, United States

³ Division of General Internal Medicine, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States

⁴ Department of Health Policy and Management, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States

⁵ Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, United States

⁶ School of Professional and Applied Psychology, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States

⁷ Division of General Internal Medicine, University of Pittsburgh, Pittsburgh, PA, United States