Feasibility and validity of a mobile application goniometer for assessing knee joint range of motion

Mbada, Chidozie Emmanuel, Sogbesan, Olawale Olamilekan, Ademoyegun, Adekola Babatunde, Awotipe, Adedayo Ayotunde, Sonuga, Oluwatobi Ademola, Gebrye, Tadesse ORCID: https://orcid.org/0000-0001-7976-2013 and Fatoye, Francis ORCID: https://orcid.org/0000-0002-3502-3953 (2023) Feasibility and validity of a mobile application goniometer for assessing knee joint range of motion. Annals of Allied Health Sciences, 9 (2). pp. 57-61. ISSN 2414-2433

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Abstract

Objective: To determine the feasibility and validity of Goniometer Records (GR), a mobile app goniometer for knee joint range of motion (ROM). Material & Methods: A total of 72 undergraduate physiotherapy students participated in this study. Knee flexion and extension was taken simultaneously with the Universal goniometer (UG) and GR, and the Mobile Application Rating Scale (MARS) and System Usability Scale (SUS) were used to assess the feasibility of GR. Results: The mean age of participants was 22.2 ± 1.6 years. There was a weak but significant correlation between UG and GR (r = 0.251; p = 0.030) for knee flexion but not for extension (r = 0.105; p = 0.37). The feasibility ratings of GR on MARS for all the sections were 17.6±2.7 (out of 25), 15.4±2.0 (out of 20), 11.4±1.3 (out of 15), 25.4±2.6 (out of 35), 14.8±2.2 (out of 20) and 21.2±2.1 (out of 30) for engagement, functionality, aesthetics and information respectively. Based on SUS statements about app usage, 63.9% of the respondents rated the App low. Conclusion: GR showed weak validity in knee flexion assessment but none with extension compared to UG. GR for knee ROM assessment had moderate feasibility but low usability rating.