Abstract
BackgroundThe Revised version of the Fibromyalgia Impact Questionnaire (FIQR) was published in 2009. The aim of this study was to prepare a Spanish version, and to assess its psychometric properties in a sample of patients with fibromyalgia.MethodsThe FIQR was translated into Spanish and administered, along with the FIQ, the Hospital Anxiety Depression Scale (HADS), the 36-Item Short-Form Health Survey (SF-36), and the Brief Pain Inventory (BPI), to 113 Spanish fibromyalgia patients. The administration of the Spanish FIQR was repeated a week later.ResultsThe Spanish FIQR had high internal consistency (Cronbach’s α was 0.91 and 0.95 at visits 1 and 2 respectively). The test-retest reliability was good for the FIQR total score and its function and symptoms domains (intraclass correlation coefficient (ICC > 0.70), but modest for the overall impact domain (ICC = 0.51). Statistically significant correlations (p < 0.05) were also found between the FIQR and the FIQ scores, as well as between the FIQR scores and the remaining scales’ scores.ConclusionsThe Spanish version of the FIQR has a good internal consistency and our findings support its validity for assessing fibromyalgia patients. It might be a valid instrument to apply in clinical and investigational grounds.
Highlights
The Revised version of the Fibromyalgia Impact Questionnaire (FIQR) was published in 2009
Those patients who volunteered to participate were given for completion a Case Report Form (CRF) that included sociodemographic data, the proposed Spanish version of the Revised Fibromyalgia Impact Questionnaire (FIQR), the validated Spanish versions of the original FIQ, the Hospital Anxiety and Depression Scale (HADS), the Short Form 36 Health Survey (SF-36), and the Brief Pain Inventory (BPI)
standard deviation (SD) Standard Deviation, intraclass correlation coefficients (ICC) intraclass correlation coefficient, 95% confidence intervals (CI) 95% confidence interval, FIQR Fibromyalgia Impact Questionnaire Revised
Summary
The Revised version of the Fibromyalgia Impact Questionnaire (FIQR) was published in 2009. Conclusions: The Spanish version of the FIQR has a good internal consistency and our findings support its validity for assessing fibromyalgia patients. Fibromyalgia syndrome (FMS) is a chronic musculoskeletal disorder characterized by widespread and diffuse pain, often accompanied by fatigue, sleep disturbances, and depressed mood [1] It significantly impairs the quality of life of the patients and can be highly disabling [2]. The FIQ has been translated and validated in 14 different languages, and has been used as an outcome measure in more than 300 research papers It is considered the most sensitive method to evaluate the clinical course of the FMS as well as its response to treatment in clinical trials [4,5,6]. The questionnaire, has been criticized, mainly due to the cumbersome scoring algorithm used, and the absence of important issues such as cognitive impairment, postural balance, or environmental sensitivity [7]
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