High test-retest reliability was found for the Function component , while results for the Disability component were more variable .
Conclusions There is extensive evidence to support the construct validity and sensitivity to change of the LLFDI among various clinical population s of community-dwelling older adults .
Background The choice of measure for use as a primary outcome in geriatric research is contingent upon the construct of interest and evidence for its psychometric properties .
The Late-Life Function and Disability Instrument ( LLFDI ) has been widely used to assess functional limitations and disability in studies with older adults .
The primary aim of this systematic review was to evaluate the current available evidence for the psychometric properties of the LLFDI .
Tolerance of an Aquatic Power Training Program by Older Adults with Symptomatic Knee Osteoarthritis
Objective . To determine the tolerance and feasibility of aquatic-based power training for improving lower limb muscle power , impairments , and mobility in adults with symptomatic knee OA . Participants . Twenty-nine adults , age 50 years and over , with symptomatic knee OA ( ACR clinical criteria ) and mobility limitation ( 400-meter walk time slower than median for sex and decade ) completed 45-minute aquatic power training sessions twice weekly for 6 weeks . Main Outcome Measurements . Prospect i ve outcomes included tolerance of the program , as well as change in stair climb power , 400-meter walk time , overall and knee-specific pain , activities of daily living ( ADL ) , quality of life ( QOL ) , and lower limb function at 6- and 12-week follow-up . Results . The training intensity required modification for 9 of the 29 participants .  Lower limb muscle power , ADL , QOL , and overall pain were improved immediately and 6 weeks following completion ( all P < 0.05 ) . However , 400-meter walk times , and lower limb function did not differ from baseline . Conclusions . A 6-week aquatic rehabilitation program appears to be well tolerated by adults with symptomatic knee OA with mobility limitations and may result in improved lower limb muscle power , symptoms , ADL , and QOL . However , this intervention may have insufficient specificity or intensity for improving physical function
High test-retest reliability was found for the Function component , while results for the Disability component were more variable .
Conclusions There is extensive evidence to support the construct validity and sensitivity to change of the LLFDI among various clinical population s of community-dwelling older adults .
Background The choice of measure for use as a primary outcome in geriatric research is contingent upon the construct of interest and evidence for its psychometric properties .
The Late-Life Function and Disability Instrument ( LLFDI ) has been widely used to assess functional limitations and disability in studies with older adults .
The primary aim of this systematic review was to evaluate the current available evidence for the psychometric properties of the LLFDI .