Please assess the completion status of the following clinical trial:

Trial Title: Cost-utility and Biological Underpinnings of MBSR in Fibromyalgia Syndrome

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE3
- Number of Arms: 3.0

Eligibility Criteria:
General Inclusion Criteria:~* Patients of both genders between 18-65 years old.~* Verified diagnosis of FMS according to the American College of Rheumatology criteria (ACR 1990).~* Ability to understand Spanish language.~* Written informed consent.~General Exclusion Criteria:~* Participation in other clinical trials~* Cognitive impairment according to MINI (total score ≤ 24)~* Receiving psychological treatment during the last or the current year~* Previous experience with meditation or mind-body therapies.~* Physical/psychiatric comorbidity that interferes with treatment (any severe medical illness, psychotic symptoms, substance abuse).~* Not being able to attend to group sessions.~* Being involved in ongoing litigation relating to the FMS.~Additional Inclusion Criteria for the biomarkers sub-study (90 participants in total):~* Female gender~* Right-handed~Additional Exclusion Criteria for the biomarkers sub-study:~* Neoplastic illnesses (diagnosed from the medical history), infection, cardiopulmonary, vascular or other internal medical conditions~* Use of oral or local corticosteroids or anti-cytokine therapy~* Needle-phobia~* Impossibility of being scanned in MRI (due to agoraphobia, metal implants, pace-marker...)~* BMI\> 36kg/m2 or \>110Kg~* Consuming \> 8 caffeine units per day~* Smoking \> 5 cigarettes per day~* Acute pain not related to the FMS at the day of biomarkers evaluation~* Being pregnant or breastfeeding.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- Mindfulness-Based Stress Reduction (Type: EXPERIMENTAL): Mindfulness-Based Stress Reduction (MBSR) The MBSR consists in eight 2-h group sessions and an all-day mindfulness retreat, and offers intensive and structured training in mindfulness meditation to help patients to relate to their physical and psychological conditions in more accepting and nonjudgmental ways. Participants will be encouraged to engage in home mindfulness practices. Sessions will be lead by 4 MBSR accredited instructors.
- Psycho-educational Program (Type: ACTIVE_COMPARATOR): Psycho-educational Program (FibroQol) It consists of eight 2-h group sessions including information about FMS (4 sessions) based on a consensus document of the Health Department of Catalonia + autogenic relaxation (4 sessions).
- Treatment As Usual (Type: OTHER): Treatment As Usual.

Based on this trial design, predict the completion outcome and termination type (if applicable).