The Impact of Type D Personality Traits on Quality of Life, Sleep, Anxiety, and Depression in Fibromyalgia Patients: A Comparative Study with Healthy Controls.

BACKGROUND Type D personality has been associated with adverse clinical outcomes and poor quality of life in many diseases. This study aimed to evaluate the effects of type D personality on pain, anxiety and depression, sleep quality, and quality of life in 50 patients with fibromyalgia syndrome. MATERIAL AND METHODS Fifty patients with fibromyalgia and 50 healthy controls were included in the study. Baseline and post-treatment evaluations encompassed a comprehensive battery of assessment tools: socio-demographic questionnaire, visual analog scale for pain, Beck Anxiety Inventory, Beck Depression Inventory, Fibromyalgia Impact Questionnaire, SF-36 Short Form Questionnaire, and Pittsburgh Sleep Quality Index. The effects of type D personality traits on clinical parameters were determined by evaluating the participants with the D-Type Personality Scale (DS-14). RESULTS Twelve participants (24%) in the control group and 30 patients (60%) in the fibromyalgia group had type D personality traits, and the difference was significant (P<0.001). The Beck Anxiety Inventory and Beck Depression Inventory scores were significantly higher, and the SF-36 domains of vitality and mental health were significantly lower in fibromyalgia patients with type D personality (P=0.023, P=0.036, P=0.002, P>0.001). CONCLUSIONS This study draws attention to the high prevalence of type D personality in patients with fibromyalgia and demonstrates that this personality trait has a negative impact on patients' clinical parameters.