Refinement and Usability Analysis of an eHealth App for Ankylosing Spondylitis as a Complementary Treatment to Physical Therapy: Development and Usability Study

Marlies Nitschke   ¹ , MSc ;   Obioma Bertrand Nwosu   ¹ , MSc ;   Lara Grube   ^{2, 3} , MD ;   Johannes Knitza   ^{2, 3} , MHBA, PD Dr ;   Ann-Kristin Seifer   ¹ , MSc ;   Bjoern M Eskofier   ^{1, 4} , Prof Dr ;   Georg Schett   ^{2, 3} , Prof Dr ;   Harriet Morf   ^{2, 3} , MD

¹ Machine Learning and Data Analytics Lab, Department Artificial Intelligence in Biomedical Engineering (AIBE), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany

² Department of Internal Medicine 3- Rheumatology & Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany

³ Deutsches Zentrum Immuntherapie, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany

⁴ Translational Digital Health Group, Institute of AI for Health, German Research Center for Environmental Health, Helmholtz Zentrum München, Neuherberg, Germany