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Article: Use of Rasch analysis in the evaluation of the oropharyngeal mucositis quality of life scale
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TitleUse of Rasch analysis in the evaluation of the oropharyngeal mucositis quality of life scale
 
AuthorsCheng, KKF1
Lee, J7
Leung, SF3
Liang, RHS2
Tai, JWM5
Yeung, RMW4
Thompson, DR6
 
Issue Date2011
 
PublisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.nursingresearchonline.com
 
CitationNursing Research, 2011, v. 60 n. 4, p. 256-263 [How to Cite?]
DOI: http://dx.doi.org/10.1097/NNR.0b013e318221f731
 
AbstractBackground: Oropharyngeal mucositis (OM) is a significant clinical problem causing profound impairment of health-related quality of life (HQoL) for patients undergoing cancer therapy. The Oropharyngeal Mucositis-Specific Health-Related Quality of Life Measure (OMQoL) was developed using classical test theory to measure the self-perceived HQoL of patients with mucositis. Objectives: The aim of this study was to analyze the OMQoL according to the Rasch model and, on the basis of results, determine whether improvements could be made. METHOD: A multicenter approach was used, and 210 patients treated with stomatotoxic chemotherapy (36%), high-dose myeloablative chemotherapy ± total body irradiation (10%), or head and neck irradiation ± chemotherapy (54%) completed the OMQoL. The Partial Credit Model of Rasch analysis was applied to evaluate the 31-item OMQoL using WINSTEPS and R software. Unidimensionality (measurement of a single construct), item fit, response category performance, person separation reliability, targeting of item difficulty to person ability, and differential item functioning (DIF) were examined. Results: Of 31 items, 5 were removed due to misfit; the OMQoL was reduced to 26 items with acceptable information weighted fit/outlier-sensitive fit indices (within 0.7-1.3) and eigenvalue units (≤2.0), confirming the unidimensionality of the reduced OMQoL. The OMQoL and its four subscales showed ordered category thresholds, and the person separation reliability was high (person separation index >0.2 with reliability >.8). Nevertheless, some of the items in the OMQoL might not be targeted effectively to patients with low levels of OM. Significant uniform and nonuniform DIFs were not found for gender (uniform DIF, p = .26; nonuniform DIF, p= .24) and age (uniform DIF, p = .95; nonuniform DIF, p = .65). Discussion: Rasch analysis reveals that the reduced 26-item OMQoL is unidimensional and is adequate to measure HQoL for patients with OM regardless of gender and age group. This improved version can provide a common platform for nurses to use in their assessment, caring, and treatment of patients with OM. Copyright © 2011 Lippincott Williams & Wilkins.
 
ISSN0029-6562
2013 Impact Factor: 1.500
 
DOIhttp://dx.doi.org/10.1097/NNR.0b013e318221f731
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorCheng, KKF
 
dc.contributor.authorLee, J
 
dc.contributor.authorLeung, SF
 
dc.contributor.authorLiang, RHS
 
dc.contributor.authorTai, JWM
 
dc.contributor.authorYeung, RMW
 
dc.contributor.authorThompson, DR
 
dc.date.accessioned2012-09-05T05:30:43Z
 
dc.date.available2012-09-05T05:30:43Z
 
dc.date.issued2011
 
dc.description.abstractBackground: Oropharyngeal mucositis (OM) is a significant clinical problem causing profound impairment of health-related quality of life (HQoL) for patients undergoing cancer therapy. The Oropharyngeal Mucositis-Specific Health-Related Quality of Life Measure (OMQoL) was developed using classical test theory to measure the self-perceived HQoL of patients with mucositis. Objectives: The aim of this study was to analyze the OMQoL according to the Rasch model and, on the basis of results, determine whether improvements could be made. METHOD: A multicenter approach was used, and 210 patients treated with stomatotoxic chemotherapy (36%), high-dose myeloablative chemotherapy ± total body irradiation (10%), or head and neck irradiation ± chemotherapy (54%) completed the OMQoL. The Partial Credit Model of Rasch analysis was applied to evaluate the 31-item OMQoL using WINSTEPS and R software. Unidimensionality (measurement of a single construct), item fit, response category performance, person separation reliability, targeting of item difficulty to person ability, and differential item functioning (DIF) were examined. Results: Of 31 items, 5 were removed due to misfit; the OMQoL was reduced to 26 items with acceptable information weighted fit/outlier-sensitive fit indices (within 0.7-1.3) and eigenvalue units (≤2.0), confirming the unidimensionality of the reduced OMQoL. The OMQoL and its four subscales showed ordered category thresholds, and the person separation reliability was high (person separation index >0.2 with reliability >.8). Nevertheless, some of the items in the OMQoL might not be targeted effectively to patients with low levels of OM. Significant uniform and nonuniform DIFs were not found for gender (uniform DIF, p = .26; nonuniform DIF, p= .24) and age (uniform DIF, p = .95; nonuniform DIF, p = .65). Discussion: Rasch analysis reveals that the reduced 26-item OMQoL is unidimensional and is adequate to measure HQoL for patients with OM regardless of gender and age group. This improved version can provide a common platform for nurses to use in their assessment, caring, and treatment of patients with OM. Copyright © 2011 Lippincott Williams & Wilkins.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationNursing Research, 2011, v. 60 n. 4, p. 256-263 [How to Cite?]
DOI: http://dx.doi.org/10.1097/NNR.0b013e318221f731
 
dc.identifier.doihttp://dx.doi.org/10.1097/NNR.0b013e318221f731
 
dc.identifier.epage263
 
dc.identifier.issn0029-6562
2013 Impact Factor: 1.500
 
dc.identifier.issue4
 
dc.identifier.pmid21691240
 
dc.identifier.scopuseid_2-s2.0-79959976478
 
dc.identifier.spage256
 
dc.identifier.urihttp://hdl.handle.net/10722/163382
 
dc.identifier.volume60
 
dc.languageeng
 
dc.publisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.nursingresearchonline.com
 
dc.publisher.placeUnited States
 
dc.relation.ispartofNursing Research
 
dc.relation.referencesReferences in Scopus
 
dc.subject.meshAdult
 
dc.subject.meshAged
 
dc.subject.meshAged, 80 And Over
 
dc.subject.meshChemotherapy, Adjuvant - Adverse Effects
 
dc.subject.meshFemale
 
dc.subject.meshHead And Neck Neoplasms - Complications - Therapy
 
dc.subject.meshHumans
 
dc.subject.meshMale
 
dc.subject.meshMiddle Aged
 
dc.subject.meshModels, Statistical
 
dc.subject.meshPsychometrics - Methods
 
dc.subject.meshQuality Of Life
 
dc.subject.meshQuestionnaires
 
dc.subject.meshRadiotherapy, Adjuvant - Adverse Effects
 
dc.subject.meshStomatitis - Etiology - Psychology
 
dc.subject.meshYoung Adult
 
dc.titleUse of Rasch analysis in the evaluation of the oropharyngeal mucositis quality of life scale
 
dc.typeArticle
 
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Author Affiliations
  1. Yong Loo Lin School of Medicine
  2. The University of Hong Kong
  3. Prince of Wales Hospital Hong Kong
  4. Pamela Youde Nethersole Eastern Hospital
  5. Queen Mary Hospital Hong Kong
  6. Australian Catholic University
  7. Chinese University of Hong Kong