Psychometric evaluation of the Oswestry Disability Index in patients with chronic low back pain: Factor and Mokken analyses

Chin Pang Lee, Tsai Sheng Fu, Chia Yih Liu, Ching I. Hung*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

57 Scopus citations

Abstract

Background: Disputes exist regarding the psychometric properties of the Oswestry Disability Index (ODI). The present study was to examine the reliability, validity, and dimensionality of a Chinese version of the ODI version 2.1 in a sample of 225 adult orthopedic outpatients with chronic low back pain [mean age (SD): 40.7 (11.4) years]. Methods: We conducted reliability analysis, exploratory bifactor analysis, confirmatory factor analysis, and Mokken scale analysis of the ODI. To validate the ODI, we used the Short-Form 36 questionnaire (SF-36) and visual analog scale (VAS). Results: The reliability, and discriminant and construct validities of the ODI was good. The fit statistics of the unidimensional model of the ODI were inadequate. The ODI was a weak Mokken scale (Hs=0.31). Conclusions: The ODI was a reliable and valid scale suitable for measurement of disability in patients with low back pain. But the ODI seemed to be multidimensional that was against the use of the raw score of the ODI as a measurement of disability.

Original languageEnglish
Article number192
JournalHealth and Quality of Life Outcomes
Volume15
Issue number1
DOIs
StatePublished - 03 10 2017

Bibliographical note

Publisher Copyright:
© 2017 The Author(s).

Keywords

  • Dimensionality
  • Low back pain
  • Psychometrics
  • Reliability
  • The Oswestry Disability Index (ODI)
  • Validity

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