Video-based Goniometer Applications for Measuring Knee Joint Angles during Walking in Neurological Patients: A Validity, Reliability and Usability Study

Author:

Parati Monica12ORCID,Gallotta Matteo2ORCID,De Maria Beatrice2ORCID,Pirola Annalisa2,Morini Matteo2,Longoni Luca3,Ambrosini Emilia1ORCID,Ferriero Giorgio45,Ferrante Simona1ORCID

Affiliation:

1. Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, Milan, Italy

2. Istituti Clinici Scientifici Maugeri IRCCS, 20138 Milan, Milan, Italy

3. Istituti Clinici Scientifici Maugeri, 20851 Lissone, Monza Brianza, Italy

4. Istituti Clinici Scientifici Maugeri IRCCS Tradate, 21049 Tradate, Varese, Italy

5. Department of Biotechnology and Life Sciences, University of Insubria, 21110 Varese, Varese, Italy

Abstract

Easy-to-use evaluation of Range Of Motion (ROM) during walking is necessary to make decisions during neurological rehabilitation programs and during follow-up visits in clinical and remote settings. This study discussed goniometer applications (DrGoniometer and Angles - Video Goniometer) that measure knee joint ROM during walking through smartphone cameras. The primary aim of the study is to test the inter-rater and intra-rater reliability of the collected measurements as well as their concurrent validity with an electro-goniometer. The secondary aim is to evaluate the usability of the two mobile applications. A total of 22 patients with Parkinson’s disease (18 males, age 72 (8) years), 22 post-stroke patients (17 males, age 61 (13) years), and as many healthy volunteers (8 males, age 45 (5) years) underwent knee joint ROM evaluations during walking. Clinicians and inexperienced examiners used the two mobile applications to calculate the ROM, and then rated their perceived usability through the System Usability Scale (SUS). Intraclass correlation coefficients (ICC) and correlation coefficients (corr) were calculated. Both applications showed good reliability (ICC > 0.69) and validity (corr > 0.61), and acceptable usability (SUS > 68). Smartphone-based video goniometers could be used to assess the knee ROM during walking in neurological patients, because of their acceptable degree of reliability, validity and usability.

Funder

Ricerca Corrente funding scheme of the Italian Ministry of Health

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry

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