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Reliability and construct validity of the Osteoarthritis Research Society International (OARSI) core set of performace-based tests for subjects with knee Osteoarthritis

Grant number: 20/15491-3
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): September 01, 2021
Effective date (End): August 31, 2022
Field of knowledge:Health Sciences - Physiotherapy and Occupational Therapy
Principal researcher:Luiz Fernando Approbato Selistre
Grantee:Vinicius Bianquini Viterbo Montilha
Home Institution: Centro de Ciências Biológicas e da Saúde (CCBS). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

The knee osteoarthritis (KOA) it is a medical condition that directly impacts the quality of life in social, economic, and functional ways causing inability and limitations caused by KOA. These limitations can be assessed using objective and subjective measurements that measure what an individual can do and what an individual think is possible to do. The OsteoArthritis Research Society International (OARSI) recommended the use of three performance-based tests (40 meters fast-paced walk test; 30 seconds chair stand test and stair negotiation test). This core-set aims to measure objectively the physical function in KOA individuals. However, the reliability and validity of these performance-based tests were evaluated only in subjects with final stage of the disease. Considering that these tests are commonly used to evaluate the effect of an intervention, the reliability and validity should be measured in individuals with mild and moderate KOA. Objective: 1) To investigate the reliability and construct validity of the performance-based tests recommended by OARSI in individuals with KOA. Methods: A total of 50 participants with age higher than 45 years old and diagnosed with KOA. Participants will perform the three performance-based tests twice with seven days as interval. In addition, pain level, physical function subjectively, and level of physical activity will also be evaluated in the first visit. The intraclass correlation coefficient (ICC) for intra-rater reliability and also, Pearson or Spearmann tests will be performed. Performance-based tests will be considered valid whether at least 75% of hypotheses are confirmed.Key-words: knee osteoarthritis, physical functional performance, reproducibility of results, physical therapy. (AU)

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