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Factor structure of the Shoulder Pain and Disability Index in patients with adhesive capsulitis

BACKGROUND: The Shoulder Pain and Disability Index (SPADI) is a self-administered questionnaire that aims to measure pain and disability associated with shoulder disease. It consists of a pain section and a disability section with 13 items being responded to on visual analogue scales. Few researcher...

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Autores principales: Tveitå, Einar Kristian, Sandvik, Leiv, Ekeberg, Ole Marius, Juel, Niels Gunnar, Bautz-Holter, Erik
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2008
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2504478/
https://www.ncbi.nlm.nih.gov/pubmed/18637165
http://dx.doi.org/10.1186/1471-2474-9-103
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author Tveitå, Einar Kristian
Sandvik, Leiv
Ekeberg, Ole Marius
Juel, Niels Gunnar
Bautz-Holter, Erik
author_facet Tveitå, Einar Kristian
Sandvik, Leiv
Ekeberg, Ole Marius
Juel, Niels Gunnar
Bautz-Holter, Erik
author_sort Tveitå, Einar Kristian
collection PubMed
description BACKGROUND: The Shoulder Pain and Disability Index (SPADI) is a self-administered questionnaire that aims to measure pain and disability associated with shoulder disease. It consists of a pain section and a disability section with 13 items being responded to on visual analogue scales. Few researchers have investigated SPADI validity in specified diagnostic groups, although the selection of an evaluative instrument should be based on evidence of validity in the target patient group. The aim of the present study was to investigate factor structure of the SPADI in a study population of patients with adhesive capsulitis. METHODS: The questionnaire was administered to 191 patients with adhesive capsulitis. Descriptive statistics for items and a comparison of scores for the two subscales were produced. Internal consistency was analyzed by use of the Cronbach alpha and a principal components analysis with varimax rotation was conducted. Study design was cross-sectional. RESULTS: Two factors were extracted, but the factor structure failed to support the original division of items into separate pain and disability sections. CONCLUSION: We found minimal evidence to justify the use of separate subscales for pain and disability. It is our impression that the SPADI should be viewed as essentially unidimensional in patients with adhesive capsulitis.
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spelling pubmed-25044782008-08-09 Factor structure of the Shoulder Pain and Disability Index in patients with adhesive capsulitis Tveitå, Einar Kristian Sandvik, Leiv Ekeberg, Ole Marius Juel, Niels Gunnar Bautz-Holter, Erik BMC Musculoskelet Disord Research Article BACKGROUND: The Shoulder Pain and Disability Index (SPADI) is a self-administered questionnaire that aims to measure pain and disability associated with shoulder disease. It consists of a pain section and a disability section with 13 items being responded to on visual analogue scales. Few researchers have investigated SPADI validity in specified diagnostic groups, although the selection of an evaluative instrument should be based on evidence of validity in the target patient group. The aim of the present study was to investigate factor structure of the SPADI in a study population of patients with adhesive capsulitis. METHODS: The questionnaire was administered to 191 patients with adhesive capsulitis. Descriptive statistics for items and a comparison of scores for the two subscales were produced. Internal consistency was analyzed by use of the Cronbach alpha and a principal components analysis with varimax rotation was conducted. Study design was cross-sectional. RESULTS: Two factors were extracted, but the factor structure failed to support the original division of items into separate pain and disability sections. CONCLUSION: We found minimal evidence to justify the use of separate subscales for pain and disability. It is our impression that the SPADI should be viewed as essentially unidimensional in patients with adhesive capsulitis. BioMed Central 2008-07-17 /pmc/articles/PMC2504478/ /pubmed/18637165 http://dx.doi.org/10.1186/1471-2474-9-103 Text en Copyright © 2008 Tveitå et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( (http://creativecommons.org/licenses/by/2.0) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Tveitå, Einar Kristian
Sandvik, Leiv
Ekeberg, Ole Marius
Juel, Niels Gunnar
Bautz-Holter, Erik
Factor structure of the Shoulder Pain and Disability Index in patients with adhesive capsulitis
title Factor structure of the Shoulder Pain and Disability Index in patients with adhesive capsulitis
title_full Factor structure of the Shoulder Pain and Disability Index in patients with adhesive capsulitis
title_fullStr Factor structure of the Shoulder Pain and Disability Index in patients with adhesive capsulitis
title_full_unstemmed Factor structure of the Shoulder Pain and Disability Index in patients with adhesive capsulitis
title_short Factor structure of the Shoulder Pain and Disability Index in patients with adhesive capsulitis
title_sort factor structure of the shoulder pain and disability index in patients with adhesive capsulitis
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2504478/
https://www.ncbi.nlm.nih.gov/pubmed/18637165
http://dx.doi.org/10.1186/1471-2474-9-103
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