Kusaka Satomi, Takahashi Tetsuya, Hiyama Yoshinori, Kusumoto Yasuaki, Tsuchiya Junko, Umeda Masaru
Department of Physical Therapy, Tokyo University of Technology: 5-23-22 Nishi-Kamata, Ota-ku, Tokyo 144-8535, Japan.
J Phys Ther Sci. 2017 Nov;29(11):1925-1928. doi: 10.1589/jpts.29.1925. Epub 2017 Nov 24.
[Purpose] The purpose of this study is to evaluate the applicability of the calf circumference as a tool for screening sarcopenia. [Subjects and Methods] One hundred sixteen community-dwelling elderly females were enrolled. Calf circumference of the dominant leg was measured using a plastic measuring tape. Subjects were divided into 3 groups based on body mass index (BMI); subjects with the values for BMI <18.5 kg/m; those with BMI 18.5 to 25.0; those with BMI ≥25.0 kg/m. Positive predictive value and negative predictive value of sarcopenia were calculated based on the obtained cut off values of calf circumference and the diagnosis of sarcopenia in each group. [Results] Prevalence rate of sarcopenia was 9.4% (n=10). Cut off value of the calf circumference was 32.8 cm (sensitivity: 73.0%, specificity: 80.0%, AUC: 0.792). Each BMI group showed high negative predictive value of sarcopenia based on the calf circumference cut off value of 32.8 cm. [Conclusion] These results suggested that to identify non-sarcopenia by larger calf circumference is more reasonable and useful than to identify sarcopenia due to the smaller calf circumference regardless of BMI.
[目的]本研究旨在评估小腿围作为筛查肌肉减少症工具的适用性。[对象与方法]纳入116名社区居住的老年女性。使用塑料卷尺测量优势腿的小腿围。根据体重指数(BMI)将受试者分为3组:BMI值<18.5 kg/m²的受试者;BMI为18.5至25.0的受试者;BMI≥25.0 kg/m²的受试者。根据获得的小腿围截断值和每组肌肉减少症的诊断结果,计算肌肉减少症的阳性预测值和阴性预测值。[结果]肌肉减少症的患病率为9.4%(n = 10)。小腿围的截断值为32.8 cm(敏感性:73.0%,特异性:80.0%,AUC:0.792)。基于32.8 cm的小腿围截断值,各BMI组肌肉减少症的阴性预测值均较高。[结论]这些结果表明,无论BMI如何,通过较大的小腿围来识别非肌肉减少症比通过较小的小腿围来识别肌肉减少症更合理、更有用。