Self-reported mobility and instrumental activities of daily living: test-retest reliability and criterion validity.
To determine the test-retest reliability and criterion validity of self-reported function in mobility and instrumental activities of daily living (IADL) in older adults, a convenience sample of 70 subjects (72.9 ± 6.6 yr, 34 male) was split into able and disabled groups based on baseline assessment and into consistently able, consistently disabled, and inconsistent based on repeat assessments over 2 weeks. The criterion validities of the self-reported measures of mobility domain and IADL-physical subdomain were assessed with concurrent baseline measures of 4 mobility performances, and that of the self-reported measure of IADL-cognitive subdomain, with the Mini-Mental State Examination. Test-retest reliability was moderate for the mobility, IADL-physical, and IADL-cognitive subdomains (κ = .51-.66). Those who reported being able at baseline also performed better on physical- and cognitive-performance tests. Those with variable performance between test occasions tended to report inconsistently on repeat measures in mobility and IADL-cognitive, suggesting fluctuations in physical and cognitive performance.
School of Physical Therapy, Chung Shan Medical University, Taichung, Taiwan.
Ching-Yi
CY
Wang
Ming-Hsia
MH
Hu
Hui-Ya
HY
Chen
Ren-Hau
RH
Li
D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003071:Cognition; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D057566:Self Report