Malnutrition is associated with poor functional performance in geriatric rehabilitation inpatients. However, it is unclear if malnourished patients have poor functional trajectories over time. This study aimed to determine the association between (the risk of) malnutrition at admission and trajectories of Activities of Daily Living (ADL) and Instrumental ADL (IADL) from pre-admission to post-discharge in geriatric rehabilitation inpatients. An observational, longitudinal study was conducted in the REStORing health of acutely unwell adulTs (RESORT) cohort of geriatric rehabilitation inpatients. A total of 618 patients (mean age 82.1 ± 7.8 years, 57.4 % females) were included. The prevalence of the risk of malnutrition, by Malnutrition Screening Tool (MST) was 41.3 % (n = 255) and malnutrition by the Global Leadership Initiative on Malnutrition (GLIM) and European Society for Clinical Nutrition and Metabolism (ESPEN) criteria were 53.5 % (n = 331) and 13.1 % (n = 81) respectively. Malnutrition by the GLIM criteria but not the ESPEN criteria nor the risk of malnutrition, was associated with ADL trajectories of ‘remained poor’ (OR: 3.33, 95 %CI: 1.21−9.19) and ‘deteriorated’ (OR: 1.68, 95 %CI: 1.13−2.52) compared to the ‘recovered’ trajectory. The risk of malnutrition and malnutrition were not associated with IADL trajectories. Malnutrition at admission was associated with poor ADL trajectories but not IADL trajectories in geriatric rehabilitation inpatients.

营养不良与老年康复住院患者的功能表现不佳有关。然而，随着时间的推移，营养不良患者的功能轨迹是否较差尚不清楚。本研究旨在确定老年康复住院患者入院时营养不良（风险）与日常生活活动 (ADL) 和工具性 ADL (IADL) 从入院前到出院后的轨迹之间的关联。在老年康复住院患者的急性不适成人 (RESORT) 队列中进行了一项观察性纵向研究。共纳入 618 名患者（平均年龄 82.1 ± 7.8 岁，57.4% 女性）。根据营养不良筛查工具 (MST)，营养不良风险的患病率为 41。3 % (n = 255) 和全球营养不良领导倡议 (GLIM) 和欧洲临床营养与代谢学会 (ESPEN) 标准分别为 53.5 % (n = 331) 和 13.1 % (n = 81)。GLIM 标准而非 ESPEN 标准或营养不良风险的营养不良与“仍然贫穷”（OR：3.33，95 %CI：1.21-9.19）和“恶化”（OR：1.68，95 %）的 ADL 轨迹相关CI：1.13-2.52）与“恢复”轨迹相比。营养不良和营养不良的风险与 IADL 轨迹无关。入院时的营养不良与老年康复住院患者的不良 ADL 轨迹有关，但与 IADL 轨迹无关。GLIM 标准而非 ESPEN 标准或营养不良风险的营养不良与“仍然贫穷”（OR：3.33，95 %CI：1.21-9.19）和“恶化”（OR：1.68，95 %）的 ADL 轨迹相关CI：1.13-2.52）与“恢复”轨迹相比。营养不良和营养不良的风险与 IADL 轨迹无关。入院时的营养不良与老年康复住院患者的不良 ADL 轨迹有关，但与 IADL 轨迹无关。GLIM 标准而非 ESPEN 标准或营养不良风险的营养不良与“仍然贫穷”（OR：3.33，95 %CI：1.21-9.19）和“恶化”（OR：1.68，95 %）的 ADL 轨迹相关CI：1.13-2.52）与“恢复”轨迹相比。营养不良和营养不良的风险与 IADL 轨迹无关。入院时的营养不良与老年康复住院患者的不良 ADL 轨迹有关，但与 IADL 轨迹无关。