Relative and absolute reliability of functional performance measures for adults with dementia living in residential aged care

Fox, Benjamin and Henwood, Timothy and Neville, Christine ORCID: https://orcid.org/0000-0003-4618-5496 and Keogh, Justin (2014) Relative and absolute reliability of functional performance measures for adults with dementia living in residential aged care. International Psychogeriatrics, 26 (10). pp. 1659-1667. ISSN 1041-6102


Abstract

Background: This pilot investigation aimed to assess the relative and absolute test-retest reliability of commonly used functional performance measures in older adults with dementia residing in residential aged care facilities. Methods: A total of 12 participants were tested on the Short Physical Performance Battery (SPPB), the Balance Outcome Measure for Elder Rehab (BOOMER), hand grip strength, anthropometric measures and Bio-electric Impedance Analysis (BIA). This study utilized a seven-day test-retest evaluation. Intra-class Correlation Coefficients (ICC) were used to assess relative reliability, Typical Error of Measurement (TEM) was used to assess the absolute reliability, and Bland-Altman plots were used to assess group and individual levels of agreement. Results: With the exception of Standing Balance (ICC = 0.49), 2.4-m walk (ICC = 0.68), functional reach (ICC = 0.38), and static timed standing (ICC = 0.47), all measures demonstrated acceptable (>0.71) ICCs. However, only the anthropometric measures demonstrated acceptable levels of absolute reliability (>10% TEM). Bland-Altman analysis showed non-significant (p > 0.05) mean differences, and eight out of the 17 measures showing wide Limits of Agreement (LoA). Conclusions: Current measures of functional performance are demonstrably inappropriate for use with a population of older adults with dementia. Authors suggest aligning current measurement strategies with Item Response Theory as a way forward.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Health, Nursing and Midwifery (1 Jul 2013 - 31 Dec 2014)
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Health, Nursing and Midwifery (1 Jul 2013 - 31 Dec 2014)
Date Deposited: 12 Aug 2019 01:37
Last Modified: 12 Aug 2019 02:01
Uncontrolled Keywords: Alzheimer's, balance, dementia, measurement, mobility, psychometrics, reliability, strength
Fields of Research (2008): 11 Medical and Health Sciences > 1199 Other Medical and Health Sciences > 119999 Medical and Health Sciences not elsewhere classified
Fields of Research (2020): 42 HEALTH SCIENCES > 4299 Other health sciences > 429999 Other health sciences not elsewhere classified
Identification Number or DOI: https://doi.org/10.1017/S1041610214001124
URI: http://eprints.usq.edu.au/id/eprint/35536

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