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 .
Improving balance control and self-reported lower extremity function in community-dwelling older adults: a randomized control trial
Objectives : To evaluate the effect of a group-based functional and specific balance training programme that included dual-task exercises on balance function  in healthy older adults . Design : A single-blind r and omized controlled trial . Setting : General community . Participants : Sixty-six community-dwelling older adults ( age 77.0 ± 6.5 years ) , without functional balance impairment were recruited and allocated at r and om to an intervention group ( n = 33 ) or a reference group ( n = 33 ) . Intervention : The intervention group received 24 training sessions over three months that included perturbation as well as dual-task exercises . The reference group received no intervention . Outcome measures : The voluntary step execution times during single- and dual-task conditions , stabilogram-diffusion analysis in upright st and ing , and self-reported physical function ; all were measured assessed at baseline and at the end of intervention . The intervention group was retested after six months . Results : Compared with the reference group , participation in group-based functional and specific balance training led to faster voluntary step execution times under single-task ( P = 0.02 ; effect size ( ES ) = 0.34 ) and dual-task ( P = 0.036 ; ES = 0.55 ) conditions ; lower transition displacement and shorter transition time of the stabilogram-diffusion analysis under eyes-closed conditions ( P = 0.007 , ES = 0.30 and P = 0.08 , ES = 0.44 , respectively ) ; and improved self-reported lower extremity function ( P = 0.006 , ES = 0.37 ) . Effects were lost at six-month follow-up . Conclusions : Functional and specific balance training can improve voluntary stepping and balance control in healthy older non-fallers , parameters previously found to be related to increased risk of falls and injury in older adults
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 .