Older Adults Daily Mobility and Its Connection to DEMMI

Mobility is an important dimension of the health of older adults. Usually, their mobility is assessed by standardized geriatric mobility assessments, e.g., the de Morton Mobility Index. Naturally, an assessment has a certain scope and only partially measures the life space mobility. Global Navigation Satellite System sensors can measure parts of the life space mobility like the maximum distance traveled from home. Using the temporal fusion transformer and its built-in explainability on time series Global Navigation Satellite System data collected in a 10-month study with 20 (pre-)frail older adults revealed a predictive relationship between the change of the de Morton Mobility Index item Sit to stand from chair and the maximum traveled distance in one day. While the 80% confidence interval for the feature importance was [85.05%, 86.32%], all other items did not play a role. Regarding the static features, using a {Walking aid} was most important with an 80% confidence interval of [71.59%, 78.64%]. © 2025 selection and editorial matter Sozo Inoue, Guillaume Lopez, Tahera Hossain and Md Atiqur Rahman Ahad; individual chapters, the contributors.