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Data from the 15 experimental setups (3 types of measurements\u00d75 exercises) were used to train a multiclass random forest. The training and validation cycle was repeated 100 times using random undersampling. At each of the 100 cycles, 80% of the data were used for training and the rest for testing. The results showed that the proposed approach achieved average sensitivities and specificities of 100% for the four KOA severity grades in the extension, cyclic, and gait tasks. This suggests that the proposed method can serve as a screening tool to determine which individuals should undergo x-rays or magnetic resonance imaging for further evaluation of KOA.<\/jats:p>","DOI":"10.1088\/2057-1976\/ad43ef","type":"journal-article","created":{"date-parts":[[2024,4,26]],"date-time":"2024-04-26T22:20:48Z","timestamp":1714170048000},"page":"045013","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Machine learning-based bioimpedance assessment of knee osteoarthritis severity"],"prefix":"10.1088","volume":"10","author":[{"given":"Juan D","family":"Mu\u00f1oz","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4884-9719","authenticated-orcid":true,"given":"V\u00edctor H","family":"Mosquera","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0601-3481","authenticated-orcid":true,"given":"Carlos F","family":"Rengifo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elizabeth","family":"Roldan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"266","published-online":{"date-parts":[[2024,5,10]]},"reference":[{"key":"bpexad43efbib1","doi-asserted-by":"publisher","first-page":"461","DOI":"10.1177\/1941738109350438","article-title":"The basic science of articular cartilage: structure, composition, and function","volume":"1","author":"Sophia Fox","year":"2009","journal-title":"Sports Health"},{"key":"bpexad43efbib2","doi-asserted-by":"publisher","first-page":"184","DOI":"10.1016\/j.joca.2021.04.020","article-title":"Epidemiology of osteoarthritis","volume":"30","author":"Allen","year":"2022","journal-title":"Osteoarthritis and Cartilage"},{"key":"bpexad43efbib3","doi-asserted-by":"publisher","first-page":"237","DOI":"10.1007\/s10439-022-02913-4","article-title":"Engineering aspects of incidence, prevalence, and management of osteoarthritis: a review","volume":"50","author":"Verma","year":"2022","journal-title":"Ann. 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