Rasch analysis of the Neck Bournemouth Questionnaire: Turkish version, validity, and reliability study

Yasemin Özel Aslıyüce ,Derya Öztuna,Özlem Ülger

doi:10.3906/sag-1907-3

Abstract

Background/aimThe multidimensional evaluation of patients with chronic neck pain is important for planning the treatment program. The aim of this study was to investigate the validity and reliability of the Turkish version of the Neck Bournemouth Questionnaire (NBQ).Materials and methods The internal construct validity of the NBQ was examined by the fit of the data to the Rasch measurement model. External validity of the NBQ was evaluated by testing for expected associations of Rasch transformed NBQ score with the corresponding variables through the process of convergent validity. The reliability of the NBQ in terms of both internal consistency and test-retest reliability was assessed by the person separation index (PSI) and differential item functioning (DIF) by time effect.ResultsIt was determined that the questionnaire has 2 factors. None of the items of Factor 1 (F1) and Factor 2 (F2) showed DIF. The reliability of F1 (Cronbach’s alpha = 0.89, PSI = 0.87) and F2 (Cronbach’s alpha = 0.77, PSI = 0.87) was good with Cronbach’s alpha and PSI. There was a good correlation between NBQ/F1 and the Neck Disability Index (NDI) (r = 0.673) and Neck Pain and Disability Scale (NPDS) (r = 0.709). Also, there was a correlation between NBQ/F2 and the Beck Depression Inventory (BDI) (r = 0.552) and Beck Anxiety Inventory (BAI) (r = 0.410).ConclusionThe Turkish version of the Neck Bournemouth Questionnaire is valid and reliable.

Highlights

Neck pain is a health problem that nearly half of all individuals in the world experience at least once in their lifetime [1]
The reliability of the Neck Bournemouth Questionnaire (NBQ) in terms of both internal consistency and test-retest reliability was assessed by the person separation index (PSI) and differential item functioning (DIF) by time effect
There was a good correlation between NBQ/Factor 1 (F1) and the Neck Disability Index (NDI) (r = 0.673) and Neck Pain and Disability Scale (NPDS) (r = 0.709)

Summary

Introduction

Neck pain is a health problem that nearly half of all individuals in the world experience at least once in their lifetime [1]. While measurement questionnaires designed to assess pain, disability, and quality of life for patients with low back pain are relatively common, they are limited for patients with neck pain. For these reasons, the Neck Bournemouth Questionnaire (NBQ) was adapted by Bolton and Humphreys in 2002 from the Bournemouth Questionnaire, which was developed for low back pain [4]. The Turkish version of the Bournemouth Questionnaire, which was developed for patients with low back pain, has been shown to be valid and reliable [5]

Objectives

Methods

Results