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Rasch analysis of the intermittent and constant osteoarthritis pain (ICOAP) scale
OBJECTIVES: The Intermittent and Constant Osteoarthritis Pain (ICOAP) questionnaire was developed to assess two forms of pain reported by people with osteoarthritis: intermittent and constant pain. Studies examining its measurement qualities have provided some support for its use as separate and tot...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
W.B. Saunders For The Osteoarthritis Research Society
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3526788/ https://www.ncbi.nlm.nih.gov/pubmed/22771772 http://dx.doi.org/10.1016/j.joca.2012.06.011 |
_version_ | 1782253623230595072 |
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author | Moreton, B.J. Wheeler, M. Walsh, D.A. Lincoln, N.B. |
author_facet | Moreton, B.J. Wheeler, M. Walsh, D.A. Lincoln, N.B. |
author_sort | Moreton, B.J. |
collection | PubMed |
description | OBJECTIVES: The Intermittent and Constant Osteoarthritis Pain (ICOAP) questionnaire was developed to assess two forms of pain reported by people with osteoarthritis: intermittent and constant pain. Studies examining its measurement qualities have provided some support for its use as separate and total scales. However, it has not been previously evaluated using Rasch analysis. The current study examined the fit between data obtained from the ICOAP questionnaire and the Rasch model to determine whether it meets the requirements of interval-level measurement. DESIGN: ICOAP responses from 175 participants with knee osteoarthritis were collected in a cross-sectional questionnaire study. Participants were recruited from hospital clinics and a group who had taken part in previous research. The questionnaires were completed at home and returned by pre-paid envelope and the data were analysed using RUMM2020. RESULTS: Fit to the Rasch model was achieved for both the Constant and Intermittent subscales following removal of a small number of items. The Total scale initially resulted in substantial misfit to the model, but fit was improved by removing four items that misfit the model. However, several participants presented with high fit residuals, which is consistent with misfit. CONCLUSIONS: The results support the use of Constant and Intermittent subscales as unidimensional measures of pain. The Total scale can be adapted to improve fit to the Rasch model, but there are concerns over participant misfit. |
format | Online Article Text |
id | pubmed-3526788 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | W.B. Saunders For The Osteoarthritis Research Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-35267882012-12-24 Rasch analysis of the intermittent and constant osteoarthritis pain (ICOAP) scale Moreton, B.J. Wheeler, M. Walsh, D.A. Lincoln, N.B. Osteoarthritis Cartilage Article OBJECTIVES: The Intermittent and Constant Osteoarthritis Pain (ICOAP) questionnaire was developed to assess two forms of pain reported by people with osteoarthritis: intermittent and constant pain. Studies examining its measurement qualities have provided some support for its use as separate and total scales. However, it has not been previously evaluated using Rasch analysis. The current study examined the fit between data obtained from the ICOAP questionnaire and the Rasch model to determine whether it meets the requirements of interval-level measurement. DESIGN: ICOAP responses from 175 participants with knee osteoarthritis were collected in a cross-sectional questionnaire study. Participants were recruited from hospital clinics and a group who had taken part in previous research. The questionnaires were completed at home and returned by pre-paid envelope and the data were analysed using RUMM2020. RESULTS: Fit to the Rasch model was achieved for both the Constant and Intermittent subscales following removal of a small number of items. The Total scale initially resulted in substantial misfit to the model, but fit was improved by removing four items that misfit the model. However, several participants presented with high fit residuals, which is consistent with misfit. CONCLUSIONS: The results support the use of Constant and Intermittent subscales as unidimensional measures of pain. The Total scale can be adapted to improve fit to the Rasch model, but there are concerns over participant misfit. W.B. Saunders For The Osteoarthritis Research Society 2012-10 /pmc/articles/PMC3526788/ /pubmed/22771772 http://dx.doi.org/10.1016/j.joca.2012.06.011 Text en © 2012 Elsevier Ltd. https://creativecommons.org/licenses/by-nc-nd/4.0/ Open Access under CC BY-NC-ND 4.0 (https://creativecommons.org/licenses/by-nc-nd/4.0/) license |
spellingShingle | Article Moreton, B.J. Wheeler, M. Walsh, D.A. Lincoln, N.B. Rasch analysis of the intermittent and constant osteoarthritis pain (ICOAP) scale |
title | Rasch analysis of the intermittent and constant osteoarthritis pain (ICOAP) scale |
title_full | Rasch analysis of the intermittent and constant osteoarthritis pain (ICOAP) scale |
title_fullStr | Rasch analysis of the intermittent and constant osteoarthritis pain (ICOAP) scale |
title_full_unstemmed | Rasch analysis of the intermittent and constant osteoarthritis pain (ICOAP) scale |
title_short | Rasch analysis of the intermittent and constant osteoarthritis pain (ICOAP) scale |
title_sort | rasch analysis of the intermittent and constant osteoarthritis pain (icoap) scale |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3526788/ https://www.ncbi.nlm.nih.gov/pubmed/22771772 http://dx.doi.org/10.1016/j.joca.2012.06.011 |
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