The 30-s chair stand test can be a useful tool for screening sarcopenia in elderly Japanese participants

• Published in: BMC musculoskeletal disorders Vol. 22; no. 1; pp. 1 - 639
• Main Authors: Sawada, Shuji, Ozaki, Hayao, Natsume, Toshiharu, Deng, Pengyu, Yoshihara, Toshinori, Nakagata, Takashi, Osawa, Takuya, Ishihara, Yoshihiko, Kitada, Tomoharu, Kimura, Ken, Sato, Nobuhiro, Machida, Shuichi, Naito, Hisashi
• Format: Journal Article
• Language: English
• Published: London BioMed Central Ltd 24.07.2021; BioMed Central; BMC
• Subjects: Chair stand test; Diagnosis; Elderly; Females; Geriatric assessment; Lower limb muscle strength; Males; Methods; Muscle contraction; Muscle strength; Musculoskeletal system; Older people; Sarcopenia; Working groups; Japan
• ISSN: 1471-2474; 1471-2474
• DOI: 10.1186/s12891-021-04524-x

Abstract Background Low muscle strength has been focused on as an essential characteristic of sarcopenia, and the 30-s chair stand test (CS-30) could be a particularly useful test for assessing muscle strength. While it is speculated to be a beneficial tool for the assessment of sarcopenia, this remains to be verified. In this study, we examined the reliability and optimal diagnostic score of the CS-30 for assessing sarcopenia in elderly Japanese participants. Methods This cross-sectional study included 678 participants (443 females and 235 males) who underwent the test for sarcopenia as per the Asian Working Group for Sarcopenia (AWGS) 2019, the CS-30 test, and the isometric knee-extension muscle strength test. ROC analysis was used to estimate the optimal CS-30 scores at which sarcopenia was detected. Results CS-30 scores were positively associated with sarcopenia (OR: 0.88; 95% CI:0.82–0.93). The AUC of the CS-30 for sarcopenia definition were 0.84 ( p  < 0.001) for females and 0.80 ( p  < 0.001) for males. The optimal number of stands in the CS-30 that predicted sarcopenia was 15 for females (sensitivity, 76.4%; specificity, 76.8%) and 17 for males (sensitivity, 75.0%; specificity, 71.7%). Conclusions The CS-30 was found to be a reliable test for sarcopenia screening in the elderly Japanese population.