The aim of the study is to examine the efficacy of Mindfulness-Based Cognitive Therapy (MBCT) in patients with functional disorders defined as severe Bodily Distress Disorder.

Hypothesis: MBCT can ameliorate the symptoms of FD defined as severe Bodily Distress Disorder and decrease health care utilization beyond the effect of shared care. Patients treated with MBCT will function better physically and socially than patients treated with shared care at 12 months' follow-up.

Functional Disorders (FD) are conditions where patients complain of multiple medically unexplained physical symptoms. FD defy the clinical picture of any conventionally defined disease and cannot adequately be supported by clinical or para-clinical findings. The disorders are common in all medical settings, both in primary and secondary care. The conditions range from mild to severe and disabling, they are costly for society due to the patients' high health care use, and the patients' social and functional level is reduced. There is no well-established, effective pharmacological, or psychotherapeutical treatment offer today.

In randomized controlled trials, cognitive behavioural treatment has shown to be effective for selected patient groups suffering from FD. However, only a few trials have been made, especially concerning treatment of the most severe disorders.

Randomized controlled trials on Mindfulness-Based Stress Reduction (MBSR) have shown mitigation of stress, anxiety, and dysphoria in a general population sample and reduction in total mood disturbances and stress symptoms in a medical population sample. Furthermore, RCTs in Mindfulness-Based Cognitive Therapy (MBCT) have demonstrated a 50 % reduction of depression relapse for individuals, who have experienced three or more previous episodes.

We wish to examine the efficacy of MBCT in patients with functional disorders defined as severe Bodily Distress Disorder.

Inclusion Criteria:

• Functional disorder defined as Bodily Distress Disorder, severe
• Moderate to severe impairment
• The disorder's functional component can easily be separated from a coexisting well-defined physical disease
• No lifetime-diagnosis of psychosis, bipolar affective disorder, or depression with psychotic symptoms
• Age 20-50 years
• Patients of Scandinavian origin, who understand, read, write, and speak Danish

Exclusion Criteria:

• No informed consent
• An acute psychiatric disorder demanding other treatment, or if the patient is suicidal
• Abuse of narcotics or alcohol or (non-prescribed) medicine
• Pregnancy