Graduate School of Medicine, Hokkaido University, North 15, West 7, Kita-ku, Sapporo 060-8638, Japan.
Department of Health and Nutrition, Faculty of Human Science, Hokkaido Bunkyo University, 5-196-1 Kogane-chuo, Eniwa 061-1449, Japan.
Nutrients. 2021 Jan 9;13(1):187. doi: 10.3390/nu13010187.
Whether the source of dietary protein intake is related to appendicular skeletal muscle mass (AMM) and muscle mass (MM) remains unclear. We conducted this cross-sectional study of 277 residents (115 men, 162 women) aged ≥65 years in Japan to examine the association of the amount of dietary protein intake with AMM and MM. We measured dietary protein intake using a brief self-administered diet history questionnaire. AMM and MM were assessed based on bioelectrical impedance. Multivariable linear regression analyses were used to estimate β coefficients that were adjusted for potential confounders. Among Japanese women aged ≥75 years, but not among women aged 65-74 years, dietary animal protein intake was significantly associated with AMM (β (95% confidence interval (CI)): 0.25 (0.10, 0.40)) and MM (β (95% CI): 0.40 (0.16, 0.64)). However, dietary vegetable protein intake was not associated with AMM (β (95% CI): -0.17 (-0.74, 0.41)) and MM (β (95% CI): -0.30 (-1.23, 0.63)). Furthermore, in men aged ≥65 years, dietary protein intake was not associated with AMM or MM. In conclusion, dietary animal protein intake, but not vegetable protein intake, were positively associated with AMM and MM among this population of Japanese women aged ≥75 years.
膳食蛋白质摄入量的来源是否与四肢骨骼肌质量（AMM）和肌肉质量（MM）有关尚不清楚。我们对日本 277 名年龄≥65 岁的居民（男性 115 名，女性 162 名）进行了这项横断面研究，以检查膳食蛋白质摄入量与 AMM 和 MM 的关系。我们使用简短的自我管理饮食史问卷来测量膳食蛋白质摄入量。根据生物电阻抗法评估 AMM 和 MM。使用多变量线性回归分析来估计β系数，这些系数经过潜在混杂因素的调整。在≥75 岁的日本女性中，但在 65-74 岁的女性中，膳食动物蛋白摄入量与 AMM（β（95%置信区间（CI））：0.25（0.10，0.40））和 MM（β（95%CI）：0.40（0.16，0.64））显著相关。然而，膳食植物蛋白摄入量与 AMM（β（95%CI）：-0.17（-0.74，0.41））和 MM（β（95%CI）：-0.30（-1.23，0.63））无关。此外，在≥65 岁的男性中，膳食蛋白质摄入量与 AMM 或 MM 无关。总之，在≥75 岁的日本女性中，膳食动物蛋白摄入与 AMM 和 MM 呈正相关，但膳食植物蛋白摄入与 AMM 和 MM 无关。
