The validity and reliability of the Turkish version of the Fibromyalgia Impact Questionnaire

This study was undertaken to translate and adapt the Fibromyalgia Impact Qu estionnaire (FIQ) into the Turkish language and investigate its validity an d reliability for Turkish female fibromyalgia (FM) patients. After translat ion into Turkish, we administered the FIQ and Health Assessment Questionnai re (HAQ) to 51 women with fibromyalgia. As well as sociodemographic charact eristics, the severity of relevant clinical symptoms, e.g;, pain intensity, fatigue, and sleep disturbance, were assessed by visual analog scales. A t ender point score (TPS) was calculated from tender points conducted by thum b palpation. Test-retest reliability, internal consistency, and concurrent and construct validities of FIQ were evaluated. Test-retest reliability and internal consistency were good at 0.81 and 0.72, respectively. Correlation between FIQ and HAQ scores was 0.43, which was low but statistically signi ficant. Significant moderate correlations were obtained between the FIQ ite ms and severity of clinical symptoms (0.63-0.77), except TPS, 0.31. The FIQ is a reliable and valid instrument for measuring functional disability in Turkish female FM patients.