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 Open Access
Published:
Jun 30, 2020
DOI:
10.4314/gmj.v54i2.9
Keywords:
Low back pain; Functional disability; Outcome measure; Psychometric testing; Nigeria

Article Details

Issue
Vol. 54 No. 2 (2020)
Section
Articles

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Main Article Content

Psychometric testing of Ibadan low back pain disability questionnaire


Bolanle A. Nottidge
Department of Physiotherapy, University of Uyo Teaching Hospital, Uyo, Akwa-Ibom State, Nigeria
Matthew O. Akpa
Department of Epidemiology and Medical Statistics, College of Medicine, University of Ibadan, Nigeria
Nse A. Odunaiya
Department of Physiotherapy, College of Medicine, University of Ibadan, Nigeria
Adesola C. Odole
Department of Physiotherapy, College of Medicine, University of Ibadan, Nigeria
Olufunmilayo I. Fawole
Department of Epidemiology and Medical Statistics, College of Medicine, University of Ibadan, Nigeria
Aderonke O. Akinpelu
Department of Physiotherapy, College of Medicine, University of Ibadan, Nigeria

Abstract

Background: The Ibadan Low Back Pain Disability Questionnaire (ILBPDQ) was developed to meet the need for a LBP treatment outcome measure that was appropriate for the Nigerian culture and environment. The objective of this study was to determine the psychometric properties of ILBPDQ.
Methods: This study used the validation design. One hundred and forty-two participants with LBP (LBPPs) and 142 age and sex-matched participants without LBP (NLBPPs) were included. The LBPPs were recruited consecutively from Physiotherapy clinics of selected tertiary hospitals in the six geopolitical zones of Nigeria. Both LBPPs and NLBPPs completed the ILBPDQ - the LBPPs completed the Numerical Pain Rating Scale (NPRS). The ILBPDQ was completed by 113 LBPPs two days after initial assessment. Sixty-four of the LBPPs received physiotherapy for 5-weeks, after which they were reassessed using ILBPDQ and NPRS.
Results: ILBPDQ score of LBPPs was significantly higher than that of NLBPPs (construct validity) and LBPPs NPRS score correlated significantly with their ILBPDQ score (r = 0.50) at baseline and post intervention (r =0.35) (divergent validity). ILBPDQ scores at baseline and 48 hours later for LBPPs correlated significantly (Intra Class Correlation =0.80) (test re -test reliability). Cronbach’s α for ILBPDQ was 0.84 (internal consistency). The postintervention ILBPDQ and NPRS scores for LBPPs were significantly lower than their pre-intervention ILBPDQ scores (responsiveness) and NPRS scores. The changes in ILBPDQ and NPRS scores of the LBPPs correlated significantly (r =0.62) (responsiveness).
Conclusion: The ILBPDQ demonstrated evidence of validity, reliability and responsiveness.
Keywords: Low back pain, Functional disability, Outcome measure, Psychometric testing, Nigeria
Funding: University of Ibadan Senate Research Grant.