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Article: Use of Rasch analysis in the evaluation of the oropharyngeal mucositis quality of life scale

TitleUse of Rasch analysis in the evaluation of the oropharyngeal mucositis quality of life scale
Authors
Issue Date2011
PublisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.nursingresearchonline.com
Citation
Nursing Research, 2011, v. 60 n. 4, p. 256-263 How to Cite?
Abstract
Background: 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.
Persistent Identifierhttp://hdl.handle.net/10722/163382
ISSN
2013 Impact Factor: 1.500
ISI Accession Number ID
References

 

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
DC FieldValueLanguage
dc.contributor.authorCheng, KKFen_US
dc.contributor.authorLee, Jen_US
dc.contributor.authorLeung, SFen_US
dc.contributor.authorLiang, RHSen_US
dc.contributor.authorTai, JWMen_US
dc.contributor.authorYeung, RMWen_US
dc.contributor.authorThompson, DRen_US
dc.date.accessioned2012-09-05T05:30:43Z-
dc.date.available2012-09-05T05:30:43Z-
dc.date.issued2011en_US
dc.identifier.citationNursing Research, 2011, v. 60 n. 4, p. 256-263en_US
dc.identifier.issn0029-6562en_US
dc.identifier.urihttp://hdl.handle.net/10722/163382-
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.en_US
dc.languageengen_US
dc.publisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.nursingresearchonline.comen_US
dc.relation.ispartofNursing Researchen_US
dc.subject.meshAdulten_US
dc.subject.meshAgeden_US
dc.subject.meshAged, 80 And Overen_US
dc.subject.meshChemotherapy, Adjuvant - Adverse Effectsen_US
dc.subject.meshFemaleen_US
dc.subject.meshHead And Neck Neoplasms - Complications - Therapyen_US
dc.subject.meshHumansen_US
dc.subject.meshMaleen_US
dc.subject.meshMiddle Ageden_US
dc.subject.meshModels, Statisticalen_US
dc.subject.meshPsychometrics - Methodsen_US
dc.subject.meshQuality Of Lifeen_US
dc.subject.meshQuestionnairesen_US
dc.subject.meshRadiotherapy, Adjuvant - Adverse Effectsen_US
dc.subject.meshStomatitis - Etiology - Psychologyen_US
dc.subject.meshYoung Adulten_US
dc.titleUse of Rasch analysis in the evaluation of the oropharyngeal mucositis quality of life scaleen_US
dc.typeArticleen_US
dc.identifier.emailLiang, RHS:rliang@hku.hken_US
dc.identifier.authorityLiang, RHS=rp00345en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1097/NNR.0b013e318221f731en_US
dc.identifier.pmid21691240en_US
dc.identifier.scopuseid_2-s2.0-79959976478en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79959976478&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume60en_US
dc.identifier.issue4en_US
dc.identifier.spage256en_US
dc.identifier.epage263en_US
dc.identifier.isiWOS:000292282400007-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridCheng, KKF=27168596400en_US
dc.identifier.scopusauthoridLee, J=52464024800en_US
dc.identifier.scopusauthoridLeung, SF=7202044876en_US
dc.identifier.scopusauthoridLiang, RHS=26643224900en_US
dc.identifier.scopusauthoridTai, JWM=7101993154en_US
dc.identifier.scopusauthoridYeung, RMW=7102833329en_US
dc.identifier.scopusauthoridThompson, DR=7404935331en_US

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