The aim of this study was to examine the digital tool Easy Angle on its concurrent validity and interrater reliability measuring active and passive range of motion in people with hip osteoarthritis.
Thirty-five subjects (20 women) were included in the study. Concurrent validity was compared with a goniometer. Inter-rater reliability was tested between two
experienced physiotherapists and included both active and passive hip joint movement in the directions of flexion, abduction, internal rotation, and external rotation in people with hip osteoarthritis. To evaluate the results Intraclass Correlation Coefficient (ICC) and Bland Altman Agreement Test was used.