Background: In the context of global population aging, nutritional risk has emerged as an important factor associated with both physical and mental health among older adults. This study aimed to examine the associations between nutritional risk, depression, and cognitive function in older adults and to explore potential variations across residential area, educational attainment, employment status, frailty status, and activities of daily living (ADL). Methods: Data were obtained from 9955 community-dwelling older adults aged 65 years and older who participated in the 2023 National Survey of Older Koreans. Nutritional risk was assessed using the DETERMINE checklist (21-point scale), a multidimensional screening tool reflecting dietary, functional, and social risk factors. Depression was measured using the Short-form Geriatric Depression Scale (15-point scale), and cognitive function was assessed using the Korean version of the Mini-Mental State Examination-2 (K-MMSE-2; 30-point scale). Hierarchical multiple linear regression, correlation, subgroup, and sensitivity analyses were conducted, adjusting for sociodemographic characteristics, health behaviors, and geriatric factors. Results: Correlation analyses showed significant associations between nutritional risk and cognitive function (r = −0.191, p < 0.05), nutritional risk and depression (r = 0.440, p < 0.05), and depression and cognitive function (r = −0.259, p < 0.05). Higher nutritional risk scores were significantly associated with greater depressive symptoms (B = 0.314, p < 0.001) and lower cognitive function (B = −0.051, p < 0.05). While some subgroup differences were observed, not all interaction effects reached statistical significance, and these findings should be interpreted with caution. Conclusions: These findings suggest that nutritional risk is associated with depressive symptoms and cognitive function in older adults. Given that the DETERMINE checklist reflects multidimensional vulnerability, the results should be interpreted as indicating broader risk contexts rather than direct nutritional status alone. These findings highlight the importance of integrated, multidimensional approaches to support older adults at nutritional risk in community settings.
Cho et al. (Thu,) studied this question.