ArticleSensors (Basel, Switzerland)2026
Development of a Global Functionality Index Integrating Physical Performance and Wearable-Derived Outdoor Walking Metrics in Older Adults.
Article in Sensors (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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3 authors.
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Abstract
objectiveTo develop and internally evaluate a Global Functionality Index (GFI) in older adults and to examine the combined influence of age, sex, and body mass index (BMI) on functional capacity.
methodsA total of 110 older adults (70.89 ± 5.93 years) completed a physical performance battery including gait, muscle strength, and endurance assessments. Wearable-derived outdoor walking speed was measured using a Garmin Forerunner 635 and HRM-Pro band. Exploratory principal component analysis, k-means clustering, and multivariable linear and logistic regression were performed.
resultsWomen had lower GFI values than men (
conclusionsThe GFI represents a derived multidimensional index of functional capacity that integrates laboratory-based performance tests and wearable-derived outdoor performance metrics. These findings support the preliminary interpretation of the GFI as a sample-dependent research index derived within this cohort; they do not establish external or predictive validity.
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