The relationship between urinary C-Telopeptide fragments of type II collagen, knee joint load, pain, and physical function in individuals with medial knee osteoarthritis

• Published in: Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil)) Brazil)), 2021-01, Vol.25 (1), p.62-69
• Main Authors: Selistre, Luiz Fernando Approbato, Gonçalves, Glaucia Helena, Vasilceac, Fernando Augusto, Serrão, Paula Regina Mendes da Silva, Nakagawa, Theresa Helissa, Petrella, Marina, Jones, Richard Keith, Mattiello, Stela Márcia
• Format: Article
• Language: English
• Subjects: Biomarkers; Collagen Type I - chemistry; Collagen Type I - urine; Collagen Type II - chemistry; Disability evaluation; Gait; Humans; Knee Joint - physiopathology; Original Research; Osteoarthritis, Knee - physiopathology; Pain - physiopathology; Peptides - chemistry; Peptides - urine; Physical therapy; Walk test
• ISSN: 1413-3555; 1809-9246
• DOI: 10.1016/j.bjpt.2020.02.002

•There is no association between uCTX-II and the knee joint load.•The uCTX-II level is associated with pain and physical function.•Knee joint load showed no association with pain and physical function. Considering the osteoarthritis (OA) model that integrates the biological, mechanical, and structural components of the disease, the present study aimed to investigate the association between urinary C-Telopeptide fragments of type II collagen (uCTX-II), knee joint moments, pain, and physical function in individuals with medial knee OA. Twenty-five subjects radiographically diagnosed with knee OA were recruited. Participants were evaluated through three-dimensional gait analysis, uCTX-II level, the WOMAC pain and physical function scores, and the 40m walk test. The association between these variables was investigated using Pearson's product-moment correlation, followed by a hierarchical linear regression, controlled by OA severity and body mass index (BMI). No relationship was found between uCTX-II level and knee moments. A significant correlation between uCTX-II level and pain, physical function, and the 40m walk test was found. The hierarchical linear regression controlling for OA severity and BMI showed that uCTX-II level explained 9% of the WOMAC pain score, 27% of the WOMAC physical function score, and 7% of the 40m walk test. Greater uCTX-II level is associated with higher pain and reduced physical function and 40m walk test performance in individuals with medial knee OA.