A Rasch analysis of assessments of morning and evening fatigue in oncology patients using the Lee Fatigue Scale

Lerdal, Anners; Kottorp, Anders Börje Mauritz; Gay, Caryl; Aouizerat, Bradley E.; Lee, Kathryn A.; Miaskowski, Christine

doi:10.1016/j.jpainsymman.2015.12.331

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	A Rasch analysis of assessments of morning and evening fatigue in oncology patients using the Lee Fatigue Scale
Authors:	Lerdal, Anners Kottorp, Anders Börje Mauritz Gay, Caryl Aouizerat, Bradley E. Lee, Kathryn A. Miaskowski, Christine
DOI:	10.1016/j.jpainsymman.2015.12.331
Published in:	Journal of Pain and Symptom Management
Volume(Issue):	51
Issue:	6
Page(s):	1002
Pages to:	1012
Issue Date:	Jun-2016
Publisher / Ed. Institution:	Elsevier
ISSN:	0885-3924 1873-6513
Language:	English
Subjects:	Fatigue; Rasch analysis; Cancer; Diurnal pattern; Psychometrics; Quality of life; Symptom; Aged; Fatigue; Female; Human; Longitudinal study; Male; Middle aged; Neoplasm; Photoperiod; Principal component analysis; Psychometrics; Reproducibility of result; Survey and questionnaire; Severity of Illness Index
Subject (DDC):	610: Medicine and health
Abstract:	Context: To accurately investigate diurnal variations in fatigue, a measure needs to be psychometrically sound and demonstrate stable item function in relationship to time of day. Rasch analysis is a modern psychometric approach that can be used to evaluate these characteristics. Objectives: To evaluate, using Rasch analysis, the psychometric properties of the Lee Fatigue Scale (LFS) in a sample of oncology patients. Methods: The sample comprised 587 patients (mean age 57.3 ± 11.9 years, 80% women) undergoing chemotherapy for breast, gastrointestinal, gynecological, or lung cancer. Patients completed the 13-item LFS within 30 minutes of awakening (i.e., morning fatigue) and before going to bed (i.e., evening fatigue). Rasch analysis was used to assess validity and reliability. Results: In initial analyses of differential item function, eight of the 13 items functioned differently depending on whether the LFS was completed in the morning or in the evening. Subsequent analyses were conducted separately for the morning and evening fatigue assessments. Nine of the morning fatigue items and 10 of the evening fatigue items demonstrated acceptable goodness-of-fit to the Rasch model. Principal components analyses indicated that both morning and evening assessments demonstrated unidimensionality. Person-separation indices indicated that both morning and evening fatigue scales were able to distinguish four distinct strata of fatigue severity. Conclusion: Excluding four items from the morning fatigue scale and three items from the evening fatigue scale improved the psychometric properties of the LFS for assessing diurnal variations in fatigue severity in oncology patients.
URI:	https://digitalcollection.zhaw.ch/handle/11475/8784
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Health Sciences
Organisational Unit:	Institute of Occupational Therapy (IER)
Appears in collections:	Publikationen Gesundheit

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Lerdal, A., Kottorp, A. B. M., Gay, C., Aouizerat, B. E., Lee, K. A., & Miaskowski, C. (2016). A Rasch analysis of assessments of morning and evening fatigue in oncology patients using the Lee Fatigue Scale. Journal of Pain and Symptom Management, 51(6), 1002–1012. https://doi.org/10.1016/j.jpainsymman.2015.12.331

Lerdal, A. et al. (2016) ‘A Rasch analysis of assessments of morning and evening fatigue in oncology patients using the Lee Fatigue Scale’, Journal of Pain and Symptom Management, 51(6), pp. 1002–1012. Available at: https://doi.org/10.1016/j.jpainsymman.2015.12.331.

A. Lerdal, A. B. M. Kottorp, C. Gay, B. E. Aouizerat, K. A. Lee, and C. Miaskowski, “A Rasch analysis of assessments of morning and evening fatigue in oncology patients using the Lee Fatigue Scale,” Journal of Pain and Symptom Management, vol. 51, no. 6, pp. 1002–1012, Jun. 2016, doi: 10.1016/j.jpainsymman.2015.12.331.

LERDAL, Anners, Anders Börje Mauritz KOTTORP, Caryl GAY, Bradley E. AOUIZERAT, Kathryn A. LEE und Christine MIASKOWSKI, 2016. A Rasch analysis of assessments of morning and evening fatigue in oncology patients using the Lee Fatigue Scale. Journal of Pain and Symptom Management. Juni 2016. Bd. 51, Nr. 6, S. 1002–1012. DOI 10.1016/j.jpainsymman.2015.12.331

Lerdal, Anners, Anders Börje Mauritz Kottorp, Caryl Gay, Bradley E. Aouizerat, Kathryn A. Lee, and Christine Miaskowski. 2016. “A Rasch Analysis of Assessments of Morning and Evening Fatigue in Oncology Patients Using the Lee Fatigue Scale.” Journal of Pain and Symptom Management 51 (6): 1002–12. https://doi.org/10.1016/j.jpainsymman.2015.12.331.

Lerdal, Anners, et al. “A Rasch Analysis of Assessments of Morning and Evening Fatigue in Oncology Patients Using the Lee Fatigue Scale.” Journal of Pain and Symptom Management, vol. 51, no. 6, June 2016, pp. 1002–12, https://doi.org/10.1016/j.jpainsymman.2015.12.331.