FDDA Utilization Study (FDDAU)

This utilization study originally aimed to investigate whether the FDDA could facilitate the differential diagnosis of fatigue and its associated symptoms and consecutively could improve the management and symptoms of fatigue. Furthermore, it aimed at investigating the time until diagnosis, the cause of fatigue, the treatment of fatigue, improvement of fatigue symptoms after treatment, the level of satisfaction of the patients resulting from treatment, time until improvement, improvement of subjective general wellbeing, referrals to other medical specialties and number of visits at physician's office because of fatigue. The planned endpoints, comparing outcomes in patients diagnosed with and without the help of the FDDA were as follows: Primary endpoint: Patient global impression of change (PGIC) at 3 months. Secondary endpoints: Patient global impression of change (PGIC) at 6 months; Percentage of patients having experienced a fatigue reduction ≥1 point (NRS); 3 or 6 months after the first visit; Time until an improvement of fatigue ≥1 point (NRS); Mean number of points of fatigue reduction (NRS); Percentage of patients with a PGIC indicating response (=any improvement) after 3 months, 6 months and 3 or 6 months; GP confidence in the established diagnosis; Clinical global impression of change (CGIC); Patient satisfaction of quality of care (diagnosis and treatment); Number of required visits for the same condition; Number of imaging or health services (specialist referrals); required for the diagnosis (MRI, radiograph, etc.); Time to final diagnosis.