Study design
This study was a two-part cross-sectional observational study. In part one, the criterion validity was measured in a movement laboratory setting with measurement by an experienced physiotherapist established as the reference test. Subsequently in part two, the same participants captured videos in their home for additional CV-aided analyses, which was used to help assess the feasibility in the home environment. The study was conducted and evaluated according to the Consensus-based Standards for the selection of health Measurement Instruments (COSMIN) pathway for validity and reported according to the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) Statement. Ethical approval was granted by the University Research Ethics Committee (reference: 201429), and the study was conducted in compliance with the Declaration of Helsinki.