Usability Evaluation of Digital Health Applications for Older People With Depressive Disorders: Prospective Observational Study in a Mixed Methods Design

Magdalini Chatsatrian   ¹ , BA ;   Katharina Kunde   ¹ , MA ;   Jennifer Bosompem   ¹ , MSc ;   Jan Dieris-Hirche   ² , Dr Med ;   Nina Timmesfeld   ³ , Prof Dr Rer Nat ;   Rainer Wirth   ⁴ , Prof Dr Med ;   Georg Juckel   ⁵ , Prof Dr Med ;   Magdalena Pape   ^{2, 6} , Dr Phil ;   Anna Mai   ³ , Dr Sportwiss ;   Chantal Giehl   ⁴ , MSc ;   Bianca Ueberberg   ⁵ , Dr Rer Nat ;   Horst Christian Vollmar   ¹ , Prof Dr Med ;   Ina Carola Otte   ^{1 *} , Prof Dr Sc Med ;   Theresa Sophie Busse   ^{1, 7 *} , Prof Dr Rer Medic

¹ Institute of General Practice and Family Medicine, Faculty of Medicine, Ruhr University Bochum, Bochum, Germany

² Department of Psychosomatic Medicine and Psychotherapy, LWL-University Hospital Bochum, Ruhr University Bochum, Bochum, Germany

³ Department of Medical Informatics, Biometry and Epidemiology, Ruhr University Bochum, Bochum, Germany

⁴ Department of Geriatric Medicine, University Hospital Marien Hospital Herne, Ruhr University Bochum, Bochum, Germany

⁵ Department of Psychiatry and Psychotherapy, LWL-University Hospital Bochum, Ruhr University Bochum, Bochum, Germany

⁶ Department of Clinical Psychology and Psychotherapy, University of Bamberg, Bamberg, Germany

⁷ Digital Health, Department of Health, Faculty of Human Medicine, Witten/Herdecke University, Witten, Germany

*these authors contributed equally