Patients who were followed-up with the diagnosis of diffuse systemic sclerosis in the Hospital of Rheumatology Clinic were evaluated in terms of inclusion criteria. 44 female patients who met the inclusion criteria were included in the study. All patients were evaluated by a rheumatologist with detailed history and physical examination. Scleroderma patient group was evaluated for the presence of other rheumatic diseases that may accompany.

The healthy control group (96 female ) was evaluated for rheumatic diseases [undiagnosed connective tissue diseases and additional rheumatological diseases] that may accompany secondary FMS exclusion.

American College of Rheumatology (ACR) FMS diagnostic criteria set:It is evaluated by the common pain index [WPI] and symptom severity (SS) scale [19]. Diffuse pain index [WPI]; It is a scale that can be scored between 0-19 and obtained by indicating the aching regions of the patient during the last 1 week. Right shoulder, left shoulder, right hip [gluteal region], left hip [gluteal region], left chin, right chin, left upper arm, left lower arm, right upper arm, right lower arm, left upper leg, left lower leg, includes right upper leg, right lower leg, chest, neck, abdomen, upper back, lower back. Symptom Severity Scale [SSS]; evaluates weakness, tired awakening and cognitive functions. In addition, muscle pain, weakness, irritable bowel syndrome, memory problems, headache, abdominal pain, numbness, dizziness, insomnia, depression, constipation, irritability, dry mouth etc. It also evaluates somatic symptoms.

The Fibromyalgia Impact Questionnaire [FIQR] was used to evaluate patients' functional status, disease progression, and outcomes. The Turkish validity study Sarmer et al. This questionnaire consists of 20 questions that question physical function, work status, depression, anxiety, sleep, pain, stiffness, fatigue and well-being. Item 1 is scored between 0-3. Other items range from 0-10 points.The total score ranges from 0-80. 80 points indicate high effectiveness.

It was developed by Beck et al. in 1988. It is a scale that measures the severity of anxiety symptoms experienced by individuals and is filled by the patient. Questions subjective subjective anxiety and physical symptoms. It consists of 21 items and it is scored between 0 and 3 likert type. The high scores in the scale indicate the severity of the anxiety experienced by the individual. Turkish validity and reliability study was made by Ulusoy et al.

It assesses risk for depression as well as level and changes in severity of depressive symptoms in the patients. This scale was developed by Beck et al. in 1961. BDI is self-reported assessment scale including 21 self-assessment statements which are rated by using 4-points Likert scale. Turkish validity and reliability was proven

It is a scale developed to measure the quality of life. Its validity and reliability in Turkish has been made. The SF-36 includes a health transition item and assesses 4 physical healthdomains as well as 4 mental health domains. The SF-36 scales can be summarized into physical component summary [PCS] and mental component summary (MCS)scores. Each SF-36 scale is scored 0-100, a higher score representing better health