Digging into the construct of fibrofog: Psychometric properties of the Spanish version of the Multidimensional Inventory of Subjective Cognitive Impairment in patients with fibromyalgia

摘要

> Perceived dyscognition or fibrofog has been ranked as one major contributor of distress in fibromyalgia ( FM ). The Multidimensional Inventory of Subjective Cognitive Impairment ( MISCI ) was devised as a brief and comprehensive self‐report measure of cognitive function in FM . The main objective of the present study was to assess the psychometric properties of the Spanish version of the MISCI . One hundred and twenty patients with FM were included, and dimensionality, reliability, and validity of the MISCI were evaluated. Data from brain imaging ( N ?=?61) were also used in validity analyses. Known‐groups validity was evaluated by including a subset of 45 patients without FM in partial/total remission from depression. Sensitivity to change was assessed after a mindfulness‐based intervention. Spanish version of the MISCI exhibited a one‐factor structure, excellent internal consistency, and good convergent validity with symptomatology and gray matter volumes in anterior and middle cingulate cortices. Significant improvements in MISCI scores after a mindfulness‐based intervention were reported. An additive effect of FM and depression regarding MISCI scores was also observed. Self‐reported depression, anxiety, and problems in balance predicted the 38% of the MISCI variance. The Spanish version of the MISCI is a valuable instrument to include in FM research and clinical practice.