The osteoarthritis knowledge scale

Ben Darlow; Chris Krägeloh; J. Haxby Abbott; Kim Bennell; Andrew M. Briggs; Melanie Brown; Jane Clark; Sarah Dean; Simon French; Rana S. Hinman; Belinda J. Lawford; Daniel O'Brien; Jackie L. Whittaker; James Stanley

doi:10.1002/msc.1727

The osteoarthritis knowledge scale

Ben Darlow^*, Chris Krägeloh, J. Haxby Abbott, Kim Bennell, Andrew M. Briggs, Melanie Brown, Jane Clark, Sarah Dean, Simon French, Rana S. Hinman, Belinda J. Lawford, Daniel O'Brien, Jackie L. Whittaker, James Stanley

^*Corresponding author for this work

Department of Chiropractic

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

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Abstract

Objective: Accurate knowledge is central to effective self-care of osteoarthritis (OA). This study aimed to assess the measurement properties of the Osteoarthritis Knowledge Scale (OAKS) with versions for the hip and knee.

Methods: Participants with hip OA (n = 144), knee OA (n = 327), and no OA (n = 735) were recruited. Rasch analysis was conducted to assess psychometric properties using data from all participants with hip OA and 144 randomly selected participants with either knee OA or no OA. Test-retest reliability and measurement error were estimated among those with hip (n = 51) and knee (n = 142) OA.

Results: Four items from the draft scales were deleted following Rasch analysis. The final 11-item OAKS was unidimensional. Item functioning was not affected by gender, age, educational level, or scale version (hip or knee). Person separation index was 0.75. Test-retest intraclass correlation coefficient was 0.81 (95% CI 0.74, 0.86; hip version 0.66 [0.47, 0.79]; knee version 0.85 (0.79, 0.90)). Smallest detectable change was 9 points (scale range 11-55; hip OA version 11 points; knee OA version 8 points).

Conclusion: The OAKS is a psychometrically adequate, unidimensional measure of important OA knowledge that can be used in populations with and without hip and knee OA. Caution is needed when using with populations with only hip OA as test-retest reliability of the hip version did not surpass the acceptable range.

Original language	English
Pages (from-to)	516-526
Number of pages	11
Journal	Musculoskeletal Care
Volume	21
Issue number	2
Early online date	27 Dec 2022
DOIs	https://doi.org/10.1002/msc.1727
Publication status	Published - Jun 2023

Bibliographical note

Copyright the Author(s) 2022. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

hip osteoarthritis
knee osteoarthritis
knowledge
patient-reported outcome measure
psychometrics
reproducibility of results

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10.1002/msc.1727

Publisher version (open access)Final published version, 635 KBLicence: CC BY-NC-ND

Cite this

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title = "The osteoarthritis knowledge scale",

abstract = "Objective: Accurate knowledge is central to effective self-care of osteoarthritis (OA). This study aimed to assess the measurement properties of the Osteoarthritis Knowledge Scale (OAKS) with versions for the hip and knee.Methods: Participants with hip OA (n = 144), knee OA (n = 327), and no OA (n = 735) were recruited. Rasch analysis was conducted to assess psychometric properties using data from all participants with hip OA and 144 randomly selected participants with either knee OA or no OA. Test-retest reliability and measurement error were estimated among those with hip (n = 51) and knee (n = 142) OA.Results: Four items from the draft scales were deleted following Rasch analysis. The final 11-item OAKS was unidimensional. Item functioning was not affected by gender, age, educational level, or scale version (hip or knee). Person separation index was 0.75. Test-retest intraclass correlation coefficient was 0.81 (95% CI 0.74, 0.86; hip version 0.66 [0.47, 0.79]; knee version 0.85 (0.79, 0.90)). Smallest detectable change was 9 points (scale range 11-55; hip OA version 11 points; knee OA version 8 points).Conclusion: The OAKS is a psychometrically adequate, unidimensional measure of important OA knowledge that can be used in populations with and without hip and knee OA. Caution is needed when using with populations with only hip OA as test-retest reliability of the hip version did not surpass the acceptable range.",

keywords = "hip osteoarthritis, knee osteoarthritis, knowledge, patient-reported outcome measure, psychometrics, reproducibility of results",

author = "Ben Darlow and Chris Kr{\"a}geloh and Abbott, {J. Haxby} and Kim Bennell and Briggs, {Andrew M.} and Melanie Brown and Jane Clark and Sarah Dean and Simon French and Hinman, {Rana S.} and Lawford, {Belinda J.} and Daniel O'Brien and Whittaker, {Jackie L.} and James Stanley",

note = "Copyright the Author(s) 2022. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher. ",

year = "2023",

month = jun,

doi = "10.1002/msc.1727",

language = "English",

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AU - Darlow, Ben

AU - Krägeloh, Chris

AU - Abbott, J. Haxby

AU - Bennell, Kim

AU - Briggs, Andrew M.

AU - Brown, Melanie

AU - Clark, Jane

AU - Dean, Sarah

AU - French, Simon

AU - Hinman, Rana S.

AU - Lawford, Belinda J.

AU - O'Brien, Daniel

AU - Whittaker, Jackie L.

AU - Stanley, James

N1 - Copyright the Author(s) 2022. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2023/6

Y1 - 2023/6

N2 - Objective: Accurate knowledge is central to effective self-care of osteoarthritis (OA). This study aimed to assess the measurement properties of the Osteoarthritis Knowledge Scale (OAKS) with versions for the hip and knee.Methods: Participants with hip OA (n = 144), knee OA (n = 327), and no OA (n = 735) were recruited. Rasch analysis was conducted to assess psychometric properties using data from all participants with hip OA and 144 randomly selected participants with either knee OA or no OA. Test-retest reliability and measurement error were estimated among those with hip (n = 51) and knee (n = 142) OA.Results: Four items from the draft scales were deleted following Rasch analysis. The final 11-item OAKS was unidimensional. Item functioning was not affected by gender, age, educational level, or scale version (hip or knee). Person separation index was 0.75. Test-retest intraclass correlation coefficient was 0.81 (95% CI 0.74, 0.86; hip version 0.66 [0.47, 0.79]; knee version 0.85 (0.79, 0.90)). Smallest detectable change was 9 points (scale range 11-55; hip OA version 11 points; knee OA version 8 points).Conclusion: The OAKS is a psychometrically adequate, unidimensional measure of important OA knowledge that can be used in populations with and without hip and knee OA. Caution is needed when using with populations with only hip OA as test-retest reliability of the hip version did not surpass the acceptable range.

AB - Objective: Accurate knowledge is central to effective self-care of osteoarthritis (OA). This study aimed to assess the measurement properties of the Osteoarthritis Knowledge Scale (OAKS) with versions for the hip and knee.Methods: Participants with hip OA (n = 144), knee OA (n = 327), and no OA (n = 735) were recruited. Rasch analysis was conducted to assess psychometric properties using data from all participants with hip OA and 144 randomly selected participants with either knee OA or no OA. Test-retest reliability and measurement error were estimated among those with hip (n = 51) and knee (n = 142) OA.Results: Four items from the draft scales were deleted following Rasch analysis. The final 11-item OAKS was unidimensional. Item functioning was not affected by gender, age, educational level, or scale version (hip or knee). Person separation index was 0.75. Test-retest intraclass correlation coefficient was 0.81 (95% CI 0.74, 0.86; hip version 0.66 [0.47, 0.79]; knee version 0.85 (0.79, 0.90)). Smallest detectable change was 9 points (scale range 11-55; hip OA version 11 points; knee OA version 8 points).Conclusion: The OAKS is a psychometrically adequate, unidimensional measure of important OA knowledge that can be used in populations with and without hip and knee OA. Caution is needed when using with populations with only hip OA as test-retest reliability of the hip version did not surpass the acceptable range.

KW - hip osteoarthritis

KW - knee osteoarthritis

KW - knowledge

KW - patient-reported outcome measure

KW - psychometrics

KW - reproducibility of results

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DO - 10.1002/msc.1727

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C2 - 36573463

SN - 1478-2189

VL - 21

SP - 516

EP - 526

JO - Musculoskeletal Care

JF - Musculoskeletal Care

IS - 2

ER -

The osteoarthritis knowledge scale

Abstract

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Keywords

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