ABSTRACT
Objectives: This study aimed to evaluate the frequency of fibromyalgianess, fibromyalgia syndrome (FS), and widespread pain in patients with rheumatoid arthritis (RA) and ankylosing spondylitis (AS) and their relationship with clinical and demographic parameters. Patients and methods: This cross-sectional multicenter trial was performed in 14 centers across Türkiye between June 2018 and November 2019. Out of 685 patients recruited from the accessible population, 661 patients (342 RA, 319 AS; 264 males, 397 females; mean age: 48.1±12.9 years; range, 17 to 88 years) met the selection criteria. In these cohorts, those who did not meet the criteria for FS and had widespread pain (widespread pain index ≥7) were evaluated as a separate group. Clinical status and demographic parameters of patients in both cohorts were evaluated as well as the evaluations of RA and AS patients with widespread pain (widespread pain index ≥7) and RA and AS patients with FS groups. In addition, correlations between polysymptomatic distress scale (PSD) scores and Visual Analog Scale (VAS), Simplified Disease Activity Index (SDAI), Clinical Disease Activity Index (CDAI), and Disease Activity Score using 28 joint counts for RA patients and VAS, Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), and Ankylosing Spondylitis Disease Activity Score (ASDAS) for AS patients were analyzed. Results: Frequencies of patients with FS and patients who had PSD scores ≥12 were 34.1% and 44.4% in all RA patients, respectively. Moreover, FS and PSD scores ≥12 were found in 29.2% and 36.9% of all AS patients, respectively. PSD scores of RA patients with FS were higher than all RA patients and RA patients with widespread pain. SDAI and CDAI scores of RA patients with FS were higher than all RA patients and RA patients with widespread pain. Similarly, PSD scores of AS patients with FS were higher than all AS patients and AS patients with widespread pain. ASDAS-erythrocyte sedimentation rate and BASDAI scores of AS patients with FS were found higher than all AS patients and AS patients with widespread pain. Conclusion: Disease activity scores, including pain in RA and AS, were higher in the presence of FS or fibromyalgianess. It may be related to clinical parameters, but cohort studies with long-term follow-up are needed to reveal causality. Additionally, to avoid overtreatment, coexistence of fibromyalgianess should be kept in mind in patients who have inflammatory diseases such as RA and AS, particularly with intractable widespread pain.
ABSTRACT
BACKGROUND: The Revised Neurophysiology of Pain Questionnaire (Revised-NPQ-Tr) is used to evaluate the change 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 α = 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 α = 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.
