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Correlated physical and mental health summary scores for the SF-36 and SF-12 Health Survey, V.1

BACKGROUND: The SF-36 and SF-12 summary scores were derived using an uncorrelated (orthogonal) factor solution. We estimate SF-36 and SF-12 summary scores using a correlated (oblique) physical and mental health factor model. METHODS: We administered the SF-36 to 7,093 patients who received medical c...

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Autores principales: Farivar, Sepideh S, Cunningham, William E, Hays, Ron D
Formato: Texto
Lenguaje:English
Publicado: BioMed Central|1 2007
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2065865/
https://www.ncbi.nlm.nih.gov/pubmed/17825096
http://dx.doi.org/10.1186/1477-7525-5-54
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author Farivar, Sepideh S
Cunningham, William E
Hays, Ron D
author_facet Farivar, Sepideh S
Cunningham, William E
Hays, Ron D
author_sort Farivar, Sepideh S
collection PubMed
description BACKGROUND: The SF-36 and SF-12 summary scores were derived using an uncorrelated (orthogonal) factor solution. We estimate SF-36 and SF-12 summary scores using a correlated (oblique) physical and mental health factor model. METHODS: We administered the SF-36 to 7,093 patients who received medical care from an independent association of 48 physician groups in the western United States. Correlated physical health (PCS(c)) and mental health (MCS(c)) scores were constructed by multiplying each SF-36 scale z-score by its respective scoring coefficient from the obliquely rotated two factor solution. PCS(c)-12 and MCS(c)-12 scores were estimated using an approach similar to the one used to derive the original SF-12 summary scores. RESULTS: The estimated correlation between SF-36 PCS(c )and MCS(c )scores was 0.62. There were far fewer negative factor scoring coefficients for the oblique factor solution compared to the factor scoring coefficients produced by the standard orthogonal factor solution. Similar results were found for PCS(c)-12, and MCS(c)-12 summary scores. CONCLUSION: Correlated physical and mental health summary scores for the SF-36 and SF-12 derived from an obliquely rotated factor solution should be used along with the uncorrelated summary scores. The new scoring algorithm can reduce inconsistent results between the SF-36 scale scores and physical and mental health summary scores reported in some prior studies. (Subscripts C = correlated and UC = uncorrelated)
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spelling pubmed-20658652007-11-08 Correlated physical and mental health summary scores for the SF-36 and SF-12 Health Survey, V.1 Farivar, Sepideh S Cunningham, William E Hays, Ron D Health Qual Life Outcomes Research BACKGROUND: The SF-36 and SF-12 summary scores were derived using an uncorrelated (orthogonal) factor solution. We estimate SF-36 and SF-12 summary scores using a correlated (oblique) physical and mental health factor model. METHODS: We administered the SF-36 to 7,093 patients who received medical care from an independent association of 48 physician groups in the western United States. Correlated physical health (PCS(c)) and mental health (MCS(c)) scores were constructed by multiplying each SF-36 scale z-score by its respective scoring coefficient from the obliquely rotated two factor solution. PCS(c)-12 and MCS(c)-12 scores were estimated using an approach similar to the one used to derive the original SF-12 summary scores. RESULTS: The estimated correlation between SF-36 PCS(c )and MCS(c )scores was 0.62. There were far fewer negative factor scoring coefficients for the oblique factor solution compared to the factor scoring coefficients produced by the standard orthogonal factor solution. Similar results were found for PCS(c)-12, and MCS(c)-12 summary scores. CONCLUSION: Correlated physical and mental health summary scores for the SF-36 and SF-12 derived from an obliquely rotated factor solution should be used along with the uncorrelated summary scores. The new scoring algorithm can reduce inconsistent results between the SF-36 scale scores and physical and mental health summary scores reported in some prior studies. (Subscripts C = correlated and UC = uncorrelated) BioMed Central|1 2007-09-07 /pmc/articles/PMC2065865/ /pubmed/17825096 http://dx.doi.org/10.1186/1477-7525-5-54 Text en Copyright © 2007 Farivar 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
Farivar, Sepideh S
Cunningham, William E
Hays, Ron D
Correlated physical and mental health summary scores for the SF-36 and SF-12 Health Survey, V.1
title Correlated physical and mental health summary scores for the SF-36 and SF-12 Health Survey, V.1
title_full Correlated physical and mental health summary scores for the SF-36 and SF-12 Health Survey, V.1
title_fullStr Correlated physical and mental health summary scores for the SF-36 and SF-12 Health Survey, V.1
title_full_unstemmed Correlated physical and mental health summary scores for the SF-36 and SF-12 Health Survey, V.1
title_short Correlated physical and mental health summary scores for the SF-36 and SF-12 Health Survey, V.1
title_sort correlated physical and mental health summary scores for the sf-36 and sf-12 health survey, v.1
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2065865/
https://www.ncbi.nlm.nih.gov/pubmed/17825096
http://dx.doi.org/10.1186/1477-7525-5-54
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