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  • Title: The Association of Mobility Determinants and Life Space Among Older Adults.
    Author: Dunlap PM, Rosso AL, Zhu X, Klatt BN, Brach JS.
    Journal: J Gerontol A Biol Sci Med Sci; 2022 Nov 21; 77(11):2320-2328. PubMed ID: 34529773.
    Abstract:
    BACKGROUND: It is important to understand the factors associated with life-space mobility so that mobility disability can be prevented/treated. The purpose of this study was to identify the association between mobility determinants and life space among older adults. METHODS: This study was a cross-sectional analysis of 249 community-dwelling older adults (mean age = 77.4 years, 65.5% female, 88% White), who were recruited for a randomized, controlled, clinical intervention trial. Associations between cognitive, physical, psychosocial, financial, and environmental mobility determinants and the life-space assessment (LSA) at baseline were determined using Spearman's correlation coefficients and one-way analysis of variance. Multivariate analysis was performed using multivariable linear regression models. RESULTS: The mean LSA score for the sample was 75.3 (SD = 17.8). Personal factors (age, gender, education, comorbidities), cognitive (Trail Making Test A and B), physical (gait speed, lower extremity power, 6-Minute Walk Test, Figure of 8 Walk Test, tandem stance, energy cost of walking, and Late-Life Function and Disability Function Scale), psychosocial (Modified Gait Efficacy Scale), and financial (neighborhood socioeconomic status) domains of mobility were significantly associated with LSA score. In the final regression model, age (β = -0.43), lower extremity power (β = 0.03), gait efficacy (β = 0.19), and energy cost of walking (β = -57.41) were associated with life space (R2 = 0.238). CONCLUSIONS: Younger age, greater lower extremity power, more confidence in walking, and lower energy cost of walking were associated with greater life space. Clinicians treating individuals with mobility disability should consider personal, physical, and psychosocial factors when assessing barriers to life-space mobility.
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