Personality Assessment Inventory in Fibromyalgia: Links to Functional, Physical-Somatic and Emotional Impact

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Abstract
Background: Fibromyalgia (FM) is a chronic condition characterized by widespread pain, fatigue, cognitive difficulties, and psychological symptoms. Patients often present distinct personality traits and psychopathological patterns associated with symptom severity. Objective: To examine psychopathological profiles in FM patients based on functional, physical-somatic, and emotional impairment domains, and on cumulative disease severity. Materials and Methods: A cross-sectional study was conducted with 70 women clinically diagnosed with FM at a specialized Fibromyalgia Unit. Psychological functioning was assessed using the Personality Assessment Inventory, and disease impact was measured with the Fibromyalgia Impact Questionnaire. Hierarchical cluster analyses were used to classify participants into mild and severe clusters across FIQ domains, and psychological profiles were compared. Results: Patients with severe functional impairment had more affective dysregulation (76.43vs.70.20,p<0.01) and somatic complaints (85.57vs.79.76,p<0.05) than those with mild impairment. The severe-physical cluster showed greater mood instability, somatization, and suicidal ideation (60.94vs.53.61,p<0.05). The severe-emotional cluster had higher rates of major depression (85.71%vs.64.28%) and persistent depressive disorder (76.19%vs.70.61%,p<0.05). Severe showed more emotional instability and somatization, distinguishing it from mild. Greater cumulative severity intensified depressive and somatic disorders. Discussion: Findings support FM’s biopsychosocial profile, where emotional distress relates to psychological and physical symptoms, reinforcing the need for personalized, multidisciplinary care.

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