Background Functional somatic symptoms and disorders are common and complex
phenomena involving both bodily and brain processes. They pose major challenges across …

Objective: To review the evidence for overlap in the phenomenology of the Functional
Somatic Syndromes (FSS). The FSS show considerable comorbidity, leading some to …

The Danish study of Functional Disorders (DanFunD) cohort was initiated to outline the
epidemiology of functional somatic syndromes (FSS) and is the first larger coordinated …

There is an immediate need for a common language and a theoretical framework of
understanding of functional symptoms and disorders across medical specialties, clinically …

Although functional somatic syndromes (FSS) show substantial overlap, treatment research
is mostly confined to single syndromes, with a lack of valid and generally accepted …

Prevalence of functional somatic syndromes (FSS) in the general population varies with
observed overlap between syndromes. However, studies including a range of FSS are …

The term 'functional gastrointestinal disorder (FGID)'is used to define several variable
combinations of chronic or recurrent gastrointestinal (GI) symptoms that do not have an …

Background Conceptualisation and classification of functional disorders appear highly
inconsistent in the health-care system, particularly in primary care. Numerous terms and …

Objective Functional somatic syndromes (FSS), defined as physical syndromes without
known underlying organic pathology, are sometimes regarded as less serious conditions …

Background Approximately 10% of the general population and around one third of adult
patients in clinical populations suffer from functional somatic symptoms. These take many …