Commonly measured constructs of mobility included walking , climbing stairs , and lower extremity function .
There was heterogeneity in ways of defining and measuring mobility limitation in older adults living in the community .
Mobility is critical in maintaining independence in older adults .
This study aims to systematic ally review the scientific literature to identify measures of mobility limitation for community-dwelling older adults .
Performance-Based Versus Patient-Reported Physical Function: What Are the Underlying Predictors?
Background Functional limitations have been operationally defined for studies of rehabilitation science through measures of physical performance and patient-reported function . Although conceived as representing similar concepts , differences between these 2 modes of measuring physical functioning have not been adequately characterized scientifically . Objective The purpose of this study was to compare the Short Physical Performance Battery ( SPPB ) with the function component of the Late-Life Function and Disability Instrument ( LLFDI ) with respect to their association with physiologic factors and other psychosocial and health factors potentially influencing rehabilitative care . Design This study was a cross-sectional analysis of baseline data from a sample of community-dwelling older adults ( N=137 ) with mobility limitations enrolled in a r and omized controlled trial of exercise . Methods A performance-based measure of function ( the SPPB ) and a self-report measure of function ( the LLFDI ) served as functional outcomes . Physiologic factors included measures of leg strength , leg velocity , and exercise tolerance test ( ETT ) duration , which served as a surrogate measure of aerobic capacity . Psychosocial and health factors included age , sex , height , body mass index , number of chronic conditions , depression , and falls efficacy . Results Separate multivariable regression models predicting SPPB and LLFDI scores described 33 % and 42 % of the variance in each outcome ( R2 ) , respectively . Leg velocity and ETT duration were positively associated with both performance-based and patient-reported functional measures . Leg strength and age were positively associated with SPPB scores , whereas number of chronic conditions , sex , and falls efficacy were associated with the LLFDI scores . Limitations This study included older adults with mobility limitations and may not generalize to other population s. Conclusions Performance-based and patient-reported measures of physical function appear to assess different aspects of an older person 's functioning . The SPPB was associated with age and physiologic factors , whereas patient-reported function measured by the LLFDI was associated with these factors as well as with psychosocial and health factors
Commonly measured constructs of mobility included walking , climbing stairs , and lower extremity function .
There was heterogeneity in ways of defining and measuring mobility limitation in older adults living in the community .
Mobility is critical in maintaining independence in older adults .
This study aims to systematic ally review the scientific literature to identify measures of mobility limitation for community-dwelling older adults .