Cross-cultural adaptation of the Revised Neurophysiology of Pain Questionnaire into the Turkish language based on Rasch analysis

Abstract

Background The Revised Neurophysiology of Pain Questionnaire (Revised-NPQ-Tr) is used to evaluate the chain in pain knowledge. No study has explored its validity and reliability for the Turkish language Objectives : This study aims to determine the psychometric properties of the Turkish version of the Revised-NPQ-Tr in chronic spinal pain patients Methods A total of 182 chronic spinal pain patients were included in the study. The Revised-NPQ-Tr results were analyzed using Rasch analysis to measure the psychometric properties Results The Revised-NPQ-Tr indicates misfit to the Rasch model, as evidenced by the borderline significant p value (LR test = 27.626; df = 11; p = .004; Bonferroni-adjusted alpha = 0.004). Two items were differentially affected by educational status. Removal of poor-functioning items did not improve the psychometric properties of the questionnaire. The Revised-NPQ-Tr is unidimensional and there was no local dependence between items. The questionnaire exhibits known group validity. Test-retest reliability of the questionnaire was moderate [intraclass correlation coefficient (ICC) = 0.629]; however, the internal consistency of the questionnaire was found to be low (Cronbach's alpha = 0.330; person separation index = 0.373) Conclusion Although the internal validity of the Revised-NPQ-Tr version was acceptable, its reliability was found to be low. Consequently, the results of Revised-NPQ-Tr should be interpreted carefully in the clinic.