Università Cattolica del Sacro Cuore, 00168 Rome, Italy.
Applied Kinesiology Laboratory-LCA, School of Physical Education, University of Campinas, 083-851 Campinas-SP, Brazil.
Nutrients. 2020 Feb 17;12(2):508. doi: 10.3390/nu12020508.
The present study investigated the associations between frailty status and (a) daily protein intake, (b) daily body weight-adjusted protein intake, (c) branched-chain amino acid (BCAA) consumption, (d) evenness of protein distribution across main meals, (e) number of daily meals providing at least 30 g of protein, and (f) number of daily meals providing at least 0.4 g protein/kg of body weight in community-dwelling older adults. The relationship between frailty status and protein-related dietary parameters was explored across different frailty assessment tools. Two hundred older adults were enrolled in the study. Participant frailty status was determined according to a modified Fried's frailty phenotype (mFP), the FRAIL scale, and the Study of Osteoporotic Fracture (SOF) index. Diet was assessed by 24-h dietary recall, while diet composition was estimated using a nutritional software. A frailty instrument-dependent relationship was observed between frailty status and protein-related dietary parameters. Protein consumption was associated with frailty status only in participants identified as frail according to the mFP. In addition, protein and BCAA intake was found to be greater in robust and pre-frail participants relative to their frail counterparts. Our findings suggest that the association between frailty and protein-related dietary parameters is tool dependent. Specifically, protein and BCAA consumption appears to be lower only in older adults identified as frail by the mFP.
（a）每日蛋白质摄入量，（b）每日体重调整后的蛋白质摄入量，（c）支链氨基酸（BCAA）摄入量，（d）主餐中蛋白质分布的均匀性，（e）每日提供至少 30 克蛋白质的餐数，以及（f）每日提供至少 0.4 克蛋白质/千克体重的餐数，这些均在社区居住的老年人中进行研究。还探索了虚弱状态与不同虚弱评估工具之间的蛋白质相关饮食参数之间的关系。该研究纳入了 200 名老年人。根据改良的 Fried 虚弱表型（mFP）、虚弱量表（FRAIL）和骨质疏松性骨折研究（SOF）指数确定参与者的虚弱状态。通过 24 小时膳食回忆评估饮食，同时使用营养软件估算饮食成分。在不同的虚弱评估工具中观察到虚弱状态与蛋白质相关饮食参数之间存在依赖关系。只有根据 mFP 被确定为虚弱的参与者中，蛋白质消耗才与虚弱状态相关。此外，与虚弱的参与者相比，强壮和衰弱前期的参与者的蛋白质和 BCAA 摄入量更高。我们的研究结果表明，虚弱与蛋白质相关饮食参数之间的关联依赖于工具。具体而言，只有根据 mFP 被确定为虚弱的老年人中，蛋白质和 BCAA 的消耗似乎较低。
