SELF-REPORTED PHYSICAL FUNCTION AS A PREDICTOR OF HOSPITALIZATION IN THE LIFE STUDY

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Background: For older adults, hospitalization confers functional loss, which in turn increases hospitalizations. Physical function screening may identify an at-risk population for early intervention. The Mobility Assessment Tool – short form (MAT-sf) is a brief, innovative, avatar-based self-report tool that predicts mobility disability. This study explored whether baseline MAT-sf score is associated with number of hospitalizations and time to first hospitalization. Design: Post-hoc analysis of prospectively-gathered data from the Lifestyle Interventions and Independence for Elders (LIFE) Study, a randomized clinical trial of lifestyle interventions to preserve mobility in older adults, conducted in eight U.S. academic medical centers. Participants: Among 1635 sedentary community-dwelling older adults enrolled in LIFE, 1574 completed baseline physical function screening including MAT-sf, with scores ranging from 30.2 (low function) to 69.8 (high function). Measurements: Number of hospitalizations and time to first hospitalization, adjusted for age, gender, race, living alone, clinical site, and baseline comorbid conditions, # prescription medications, and cognition. Results: Of the 1557 participants with hospitalization data, 726 (47%) experienced at least one hospitalization, with the majority (78%) of these experiencing 1–2 hospitalizations. For every 10-point increase in MAT-sf defined mobility, there was a 16% decreased rate of all hospitalizations (adjusted rate ratio 0.84, 95% CI: 0.76 to 0.93, p< 0.001). Higher baseline MAT-sf scores were also associated with a decreased risk of first hospitalization (adjusted Hazard Ratio 0.83, 95% CI: 0.76 to 0.92, p< 0.001, per 10-point increase in MAT-sf). Conclusion: MAT-sf may identify older adults at increased risk for hospitalizations, who may benefit from care coordination.

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