Background
Hospitalization reduces mobility for many older adults, which in turn is associated with an increased risk of hospitalization. Physical function screening may identify an at-risk population for intervention. The Mobility Assessment Tool â short form (MAT-sf) is a brief, animated, computer-based means of assessing mobility that predicts mobility disability. This study explored whether baseline MAT-sf scores are associated with number of hospitalizations and time to first hospitalization across a median follow-up of 2.7 years.
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 the MAT-sf, with baseline scores ranging from 30.2 (low function) to 69.8 (high function) on a scale from 30-80.
Measurements
Number of hospitalizations and time to first hospitalization, adjusted for age, gender, race, living alone, clinical site, baseline comorbidities, # prescription medications, and cognition.
Results
Of the 1557 participants with data regarding hospitalization status, 726 (47%) experienced at least one hospitalization; the majority (78%) of these experienced 1-2 hospitalizations. For every 10-point difference in MAT-sf score, the rate of all hospitalizations was higher by 19% in those with lower scores (adjusted rate ratio 1.20, 95% CI: 1.08-1.32, p<0.001). Lower baseline MAT-sf scores were also associated with an increased risk of first hospitalization (adjusted Hazard Ratio 1.20, 95% CI: 1.09 to 1.32, p< 0.01, per 10-point difference in MAT-sf).
Conclusion
Low MAT-sf scores identify older adults at increased risk for hospitalizations; further study is needed to test interventions to reduce hospitalizations in these patients.