Evaluating the Accuracy and Reliability of Real-World Digital Mobility Outcomes in Older Adults After Hip Fracture: Cross-Sectional Observational Study

Martin A Berge   ¹ , MSc ;   Anisoara Paraschiv-Ionescu   ² , PhD ;   Cameron Kirk   ³ , PhD ;   Arne Küderle   ⁴ , MSc ;   Encarna Micó-Amigo   ³ , PhD ;   Clemens Becker   ^{5, 6} , PhD ;   Andrea Cereatti   ⁷ , PhD ;   Silvia Del Din   ^{3, 8} , PhD ;   Monika Engdal   ¹ , MSc ;   Judith Garcia-Aymerich   ^{9, 10, 11} , PhD ;   Karoline B Grønvik   ¹ , MSc ;   Clint Hansen   ¹² , PhD ;   Jeffrey M Hausdorff   ^{13, 14, 15, 16, 17} , PhD ;   Jorunn L Helbostad   ¹ , PhD ;   Carl-Philipp Jansen   ^{5, 6} , PhD ;   Lars Gunnar Johnsen   ^{1, 18} , PhD ;   Jochen Klenk   ^{6, 19, 20} , PhD ;   Sarah Koch   ^{9, 10, 11, 21} , PhD ;   Walter Maetzler   ¹² , PhD ;   Dimitrios Megaritis   ^{3, 22} , PhD ;   Arne Müller   ²³ , PhD ;   Lynn Rochester   ^{3, 8} , PhD ;   Lars Schwickert   ⁶ , PhD ;   Kristin Taraldsen   ²⁴ , PhD ;   Beatrix Vereijken   ¹ , PhD

¹ Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology, Trondheim, Norway

² Laboratory of Movement Analysis and Measurement, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland

³ Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne, United Kingdom

⁴ Machine Learning and Data Analytics Lab, Department Artificial Intelligence in Biomedical Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany

⁵ Geriatric Center, Medical Faculty Heidelberg, Heidelberg University, Heidelberg, Germany

⁶ Department of Geriatrics and Rehabilitation, Robert Bosch Hospital, Stuttgart, Germany

⁷ Department of Electronics and Telecommunications, Politecnico di Torino, Turin, Italy

⁸ National Institute for Health and Care Research Newcastle Biomedical Research Centre, Newcastle University and the Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle Upon Tyne, United Kingdom

⁹ Barcelona Institute for Global Health, Barcelona, Spain

¹⁰ Department of Medicine and Life Sciences, Universitat Pompeu Fabra, Barcelona, Catalonia, Spain

¹¹ CIBER Epidemiología y Salud Pública, Madrid, Spain

¹² Department of Neurology, University Hospital Schleswig-Holstein and Kiel University, Kiel, Germany

¹³ Center for the Study of Movement, Cognition, and Mobility, Neurological Institute, Tel Aviv Medical Center, Tel Aviv, Israel

¹⁴ Department of Physical Therapy, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel

¹⁵ Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel

¹⁶ Rush Alzheimer’s Disease Center, Rush University Medical Center, Chicago, IL, United States

¹⁷ Department of Orthopedic Surgery, Rush Medical College, Rush University, Chicago, IL, United States

¹⁸ Department of Orthopaedic Surgery, St. Olav’s Hospital, Trondheim, Norway

¹⁹ Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany

²⁰ IB University of Health and Social Sciences, Study Centre Stuttgart, Stuttgart, Germany

²¹ Department of Sport, Exercise, and Health, University Basel, Basel, Switzerland

²² Department of Sport, Exercise and Rehabilitation, Northumbria University Newcastle, Newcastle Upon Tyne, United Kingdom

²³ Novartis Biomedical Research, Novartis Pharma AG, Basel, Switzerland

²⁴ Department of Rehabilitation Science and Health Technology, OsloMet, Oslo, Norway