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

Fox, Benjamin, Henwood, Timothy, Neville, Christine 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: 1659-1667. doi:10.1017/S1041610214001124


Author Fox, Benjamin
Henwood, Timothy
Neville, Christine
Keogh, Justin
Title Relative and absolute reliability of functional performance measures for adults with dementia living in residential aged care
Journal name International Psychogeriatrics   Check publisher's open access policy
ISSN 1041-6102
1741-203X
Publication date 2014-10-01
Year available 2014
Sub-type Article (original research)
DOI 10.1017/S1041610214001124
Open Access Status Not yet assessed
Volume 26
Issue 10
Start page 1659
End page 1667
Total pages 9
Place of publication Cambridge, United Kingdom
Publisher Cambridge University Press
Language eng
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.
Formatted 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.
Keyword Dementia
Alzheimer’s
Reliability
Psychometrics
Mobility
Balance
Strength
Measurement
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Nursing, Midwifery and Social Work Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 7 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 26 Mar 2014, 06:19:48 EST by Dr Christine Neville on behalf of School of Nursing, Midwifery and Social Work