Related Experiment Video
Updated: Jun 18, 2026
Assessment of Dependence in Activities of Daily Living Among Older Patients in an Acute Care Unit
Published on: September 30, 2020
Construct validity of the late life function and disability instrument for adults with chronic conditions
Carri Hand1, Julie Richardson, Lori Letts
1School of Rehabilitaton Science, McMaster University, Hamilton, Ontario, Canada L8S 1C7. handc@mcmaster.ca
Objectives:
To evaluate the validity of the late life function and disability instrument (LLFDI) when applied to adults aged 44-65 years with chronic conditions.
Design:
We applied a convergent cross-sectional construct validity design to examine the association between the LLFDI subscales and the medical outcomes study (MOS) 36-Item Health Survey Physical Component Score (SF36 PCS), MOS Physical Functioning scale (PF10), 2-minute walk distance (2MWD) and 8-foot walk test (8FWT).
Participants:
Our sample consisted of 174 community-dwelling adults age 45-65 years with one or more chronic conditions.
Setting:
Participants were enrolled at a multidisciplinary family health practice.
Results:
The LLFDI function correlated strongly with the PF10 (r = 0.84) and moderately with the 2MWD (r = 0.53) and 8FWT (r = -0.48). The LLFDI disability limitation correlated moderately with the SF36 PCS, 2MWD and 8FWT (r = 0.67, 0.45, -0.32, respectively). The LLFDI disability frequency correlated moderately with the SF36 PCS, 2MWD and 8FWT (r = 0.44, 0.33, -0.31). Ninety-five percent confidence intervals on all correlation coefficients excluded zero.
Conclusion:
Cross-sectional convergent validity of the LLFDI was supported when applied to adults 45-65 years of age with chronic conditions.
Related Concept Videos
01:30Cognitive Development During Adulthood
02:20Longitudinal Research