Self-report questionnaires
Pain, anxiety, FMS symptoms, pain, depression
FMS, FIBROMYALGIA
Fibromyalgia—related symptoms questionnaires:(1) Widespread pain index (WPI)—a count of the number of painful body regions. The WPI ranges from 0 to 19 [Quality of life related questionnaire: (1) The RAND Health Status Survey, Short Form-36 (SF-36) was used to assess quality of life. The questionnaire evaluates physical functioning; bodily pain; role limitations due to physical health problems; role limitations due to personal or emotional health; general mental health; social functioning; energy/fatigue; and general health perception. Each index ranges between 0 and 100, with a high score indicating better health [Psychological related questionnaires: (1) The Brief Symptom Inventory−18 (BSI-18) was used to evaluate psychological distress. The questionnaire generates a summary scale and three subscales: depression, anxiety, and somatization, and ranges between 0 and 24 [Due to the subjective nature of pain, and the complexity and diversity of FMS symptoms, we defined the following indexes for quantifying this complex constellation of symptoms more precisely: Pain index = mean [VAS, GPS, WPI] and FMS index = mean [FIQ, BSI, reversed (Social function score)].