The validity and reliability of the Persian version of the Revised Fibromyalgia Impact Questionnaire

Abstract

The Revised Fibromyalgia Impact Questionnaire (FIQR), an updated version of the Fibromyalgia Impact Questionnaire (FIQ) achieved a better balance among different domains (i.e., function, overall impact, and symptom severity) and attempts to address the limitations of FIQ. As there is no Persian version of the FIQR available, we aimed to investigate the validity and reliability of a Persian translation of the FIQR in Iranian patients. After translating the FIQR into Persian, it was administered to 77 female patients with fibromyalgia syndrome. All of the patients filled out the questionnaire together with a Persian version of the FIQ, short form-12 (SF-12). The tender-point count was also calculated. One week later, FM patients filled out the Persian FIQR at their second visit. Reliability was analyzed by internal consistency and reproducibility including Cronbach's α coefficient and intra-class correlation coefficient. Construct validity was evaluated by Spearman's correlation coefficient and Pearson's correlation coefficient. Statistical analysis was performed using SPSS for Windows version 17.0. All patients included in this study were female, and the mean age was 38.23 ± 10.68 years. The total scores of the FIQR and FIQ were 49.77 ± 18.27 and 54.05 ± 14.00 that were closely correlated (r = 0.63, p < 0.01), and each of the three domains of the Persian FIQR was also correlated well with the three related FIQ domains (r = 0.36-0.63, p < 0.01). Also some significant inverse correlations of FIQR with quality-of-life (assessed by SF-12) domains and items were found. Cronbach's α was 0.87 for FIQR in the first visit. The Persian FIQR showed adequate reliability and validity. This instrument can be used in the clinical evaluation of Iranian patients with fibromyalgia.

Translation, validation and cross‐cultural adaptation of the Revised Fibromyalgia Impact Questionnaire (FIQR) in Nepali language

“…The internal consistency of the domains was acceptable with lowest value of Cronbach's alpha obtained for the domain of overall impact (0.71) and highest for the domain of function (0.90). It is lower than the original version (0.95) 9 and Portuguese version (0.94) 17 but in line with other study groups like Spanish (0.91), 18 Turkish (0.89), 19 Moroccan (0.91), 20 Jordanian Arabic (0.91), 21 Persian (0.87) 22 and Brazilian (0.96) 23 versions. The test‐retest reliability of Nepali FIQR was acceptable ranging from 0.65 to 0.94 for individual items and 0.89 for overall score.…”

Serum Vitamin D Status in Iranian Fibromyalgia Patients: according to the Symptom Severity and Illness Invalidation

“…All participants were asked to fill out the demographic characteristics form, the Illness Invalidation Inventory (3 * I), the Revised Fibromyalgia Impact Questionnaire (FIQR) and a short-form health survey (SF-12) [ 20 21 22 23 ]. Then, the FM patients underwent dolorimetery examination for evaluation of tender point counts.…”

“…In our study, the clinical severity and progress of FM was assessed by the validated Persian version of the FIQR [ 23 ]. This questionnaire has 21 individual questions.…”

Effect of Crocus sativus (Saffron) Intake on Top of Standard Treatment, on Disease Outcomes and Comorbidities in Patients with Rheumatic Diseases: Synthesis without Meta-Analysis (SWiM) and Level of Adherence to the CONSORT Statement for Randomized Controlled Trials Delivering Herbal Medicine Interventions

“…For RA, the disease-specific scores involved the disease activity score-28 (DAS-28) including the ESR assay [47] (DAS-28-ESR) and the swollen and tender joint count (SJC, TJC). For the RCT performed in patients with FM [30], the fibromyalgia impact questionnaire (FIQ) [48,49] was applied. In the case of OA, one trial [29,32] reported using the WOMAC [41].…”