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The aim of this study was to analyse sex differences in the relationship between SI and sarcopenia in a Chinese community-based population.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>This cross-sectional study included participants from 2011 China Health and Retirement Longitudinal Study. The SI was defined as 100\u2009\u00d7\u2009creatinine \/ cystatin C. Diagnosis of sarcopenia based on the Asian Working Group for Sarcopenia 2019 consensus. Logistic regression model, linear regression model, and natural spline model were used to analyze the association between SI and sarcopenia.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>A total of 7,118 participants with a mean age of 60.6\u2009\u00b1\u200910.1 were included, 53.4% females. In males, the prevalence of sarcopenia decreased by 25% for every 10 increase in SI, and skeletal muscle mass index (SMI) increased by 0.04, odds ratio (OR), \u03b2, and 95% confidence interval (CI) were 0.75 (0.65\u20130.87), 0.04 (0.02\u20130.05), both P\u2009&lt;\u20090.001. In females, the SI was not significantly associated with sarcopenia, OR and 95% CI were 0.99 (0.9\u2009~\u20091.08), P\u2009=\u20090.775; for every 10 increase in SI, the SMI in females decreased by 0.03, \u03b2 and 95% CI were -0.03 (-0.04\u2009~\u2009-0.01), P\u2009=\u20090.001.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion<\/jats:title>\n            <jats:p>In the Chinese community, the SI is negatively associated with sarcopenia in males and has moderate diagnostic test performance. It was not associated with sarcopenia in females, and using the SI to screen for sarcopenia in females may not be a reliable method.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1007\/s41999-024-01111-w","type":"journal-article","created":{"date-parts":[[2024,12,2]],"date-time":"2024-12-02T17:37:51Z","timestamp":1733161071000},"page":"55-65","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Sex differences in the association between sarcopenia index and sarcopenia: a cross-sectional study from a Chinese community-based population"],"prefix":"10.1007","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-0842-828X","authenticated-orcid":false,"given":"Hong","family":"Yang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-8892-8202","authenticated-orcid":false,"given":"Yunda","family":"Huang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guihua","family":"Jiang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhiping","family":"Duan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Runfen","family":"Du","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yinan","family":"Hao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Huang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-3353-084X","authenticated-orcid":false,"given":"Xiaoling","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,12,2]]},"reference":[{"key":"1111_CR1","doi-asserted-by":"publisher","first-page":"300","DOI":"10.1016\/j.jamda.2019.12.012","volume":"21","author":"L-K Chen","year":"2020","unstructured":"Chen L-K, Woo J, Assantachai P, Auyeung T-W, Chou M-Y, Iijima K et al (2020) Asian working group for sarcopenia: 2019 consensus update on sarcopenia diagnosis and treatment. 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