[A homebound status is related to a reduction of meal intake in older outpatients, independent depressive mood and their physical function].

We aimed to investigate the relationship between the frequency at which patients went out and the reduction of meal intake among older outpatients who did not require care. The subjects were outpatients of ≥65 years of age who visited the department of geriatric medicine in our hospital for the first time. We analyzed 463 subjects (male, n=184; female, n=279), after excluding patients who had dementia, required care, lived in a nursing home, or had an acute disease.The outcome measure was the reduction of meal intake (a moderate or higher decrease in the patient's meal intake in the past 3 months). The independent measure was homebound status (going-out less than once a week). The covariates were sex, age, number of medications, and Kihon Checklist (categories of undernutrition, oral function, physical function, and mood). A logistic regression analysis was performed. The average age was 79.6±5.9 years in men, 79.9±6.1 years in women. Among the participants, 104 (22.5%) had a homebound status. In the logistic regression analyses, a homebound status was significantly associated with a reduction in meal intake, even after adjustment for potential confounding factors, including depressive mood and a low physical function (OR: 2.0; 95% CI: 1.1-3.6). A homebound status in older outpatients was related to a decline in their meal intake, independent of depressive mood and a low physical function. A reduction in meal intake leads to a lack of energy and results in malnutrition. Our results suggest that assessing the frequency at independently living older outpatients go out is important for the early prevention of malnutrition.