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新型算法用于估计女性的无脂肪肌肉体积,使用尿化-肌酸稀释方法

Darren Yuen Zhang Tan¹, Wei Fun Cheong¹, Shanshan Ji²

¹Department of Obstetrics and Gynecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore.

Journal of cachexia, sarcopenia and muscle

|July 9, 2025

概括

一个新的化肌酸 (D3Cr) 算法,D3CrHt-Wt,准确估计亚洲女性的无脂肪肌肉质量. 这种方法与MRI具有很高的相关性,并为萨尔科佩尼亚研究提供了一种方便的工具.

科学领域:

老年学是一门学科.
生物医学工程生物医学工程
营养科学营养科学

背景情况:

绝经后肌肉质量损失与老年妇女的脆弱和不良身体功能有关.
化肌酸 (D3Cr) 稀释方法评估肌肉质量,但需要在亚洲人群中进行验证.
磁共振成像 (MRI) 作为肌肉质量测量的参考标准.

研究的目的:

开发和验证一种新的D3Cr算法 (D3CrHt-Wt),用于估计亚洲女性的无脂肪肌肉质量.
为了提高准确性,将人类测量变量纳入D3Cr方法.
将新算法的性能与现有的D3Cr方法和MRI进行比较.

主要方法:

从综合妇女健康计划 (IWHP) 招募了451名女性 (45-69岁).
服用30毫克D3Cr并采集尿样以分析肌酸和D3-肌氨酸水平.
开发了D3CrHt-Wt算法,使用步骤多变量回归,结合D3Cr决定的肌池大小,体重和身高.
验证了D3CrHt-Wt算法与MRI测量无脂肪大腿和勃起器脊柱体积的验证.

主要成果:

在验证队列中,D3CrHt-Wt算法与MRI测量的无脂肪肌肉体积具有很高的相关性 (R=0.813).
新的算法性能优于现有的方法 (D3Cr_原始R=0.672,D3Cr_修改R=0.692).
布兰德-阿尔特曼分析显示,D3CrHt-Wt和MRI之间的偏差低 (-0.112 L) 和可接受的协议边界 (-0.969 L到+1.190 L) 是低的.

结论:

与MRI相比,D3CrHt-Wt算法提供了一个高度相关且可接受的无脂肪肌肉体积估计.
D3Cr方法的方便性使其成为评估在肉症研究中的无脂肪肌肉质量的有希望的工具.
这种经过验证的算法可以帮助监测老年亚洲女性的肌肉健康和干预措施.

关键词:

这就是为什么MRI是MRI.身体构成身体组成创造蛋白是一种创造性蛋白质.肌氨酸是什么意思肌氨酸是什么意思肌肉质量肌肉质量肌肉质量这种类型的麻症是sarcopenia.

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