Objectives: To evaluate the clinical- and cost-effectiveness of two delivery formats of mindfulness-based cognitive therapy (MBCT) - (i) MBCT delivered through eight videoconference group sessions (group MBCT), and (ii) MBCT delivered through a self-help manual plus three low-intensity videoconference group support sessions (supported MBCT self-help) - when added to treatment as usual (TAU; mental health outpatient care), compared with TAU alone, in patients with recurrent depression in partial remission. We will identify potential predictors and moderators of response and examine psychological mechanisms of change. Study design: Multicentre randomised controlled trial, with pre-post, 6- and 12-months follow-ups. Centres: Parc Sanitari Sant Joan de Déu (St. Boi de Llobregat), Hospital Universitario Miguel Servet (Zaragoza), and Hospital del Mar (Barcelona). Participants: Adult patients (n=315) with recurrent depression in partial remission will be randomly assigned to group MBCT, supported MBCT self-help, or TAU. Primary outcome: time from randomisation to depressive relapse/recurrence at 12-month follow-up (DSM-5). Secondary outcomes: residual symptoms, well-being, quality of life, costs, and quality-adjusted life years. Process measures: rumination, mindfulness, decentering, affectivity, and self-compassion. Main statistical analyses: Hazard ratios will be calculated using survival analysis. Secondary outcomes, predictors, and moderators will be tested using regression-based approaches. Incremental cost-effectiveness ratios from healthcare system and societal perspectives will be estimated, alongside mediation analyses. Expectations and acceptability will be evaluated using qualitative methods. Conclusions: This study will inform the implementation of two accessible MBCT formats in Spain for preventing depressive relapse/recurrence. The use of different delivery formats will provide information on effectiveness, scalability, and value for money.
The BECOME trial was developed to fill an important evidence gap on whether Mindfulness-Based Cognitive Therapy (MBCT) is clinically effective and cost-effective for preventing relapse and recurrence of depression when delivered within the Spanish National Health System (NHS). While MBCT has strong evidence as an alternative to maintenance antidepressant medication (m-ADM) for people with recurrent depression, most of this research has been conducted outside Spain and has not been confirmed in a sufficiently powered, multicentre randomized controlled trial in the Spanish setting. This gap is especially relevant in the post-COVID-19 period, when depressive disorders have increased in prevalence and severity, adding pressure to already overstretched public mental health services. Recurrent depression also carries a high social and economic burden in Spain, so identifying interventions that can reduce relapse while remaining feasible and sustainable for the NHS is a public health priority. Most prior studies have focused on face-to-face MBCT and have given limited attention to implementation constraints in publicly funded systems. In addition, many patients report concerns about long-term antidepressant use (e.g., side effects and adherence difficulties) and often prefer psychological approaches, highlighting the need to evaluate acceptable and accessible alternatives such as MBCT. By comparing videoconference-delivered group MBCT and supported MBCT self-help against treatment as usual (TAU), this study aims to provide pragmatic evidence on whether different MBCT delivery formats can broaden access to relapse-prevention care while preserving clinical benefit and good value for money in routine services. The trial will also assess outcomes from both healthcare and societal perspectives, which is important given the significant indirect costs of recurrent depression in Spain, including work disability and reduced productivity. As digitally supported care becomes more common, rigorous evaluation of its clinical and economic impact is essential to ensure that digital delivery improves outcomes and delivers measurable public health value.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
315
Videoconference-delivered group MBCT will be provided in line with the manual 'Mindfulness-Based Cognitive Therapy for Depression'. The program will be led by Spanish MBCT therapists who are trained and certified, and who will also complete a 2-day study standardisation course. After this training, therapists must demonstrate at least "competent" teaching skills, confirmed by an independent assessor using the Mindfulness-Based Interventions Teaching Assessment Criteria (MBI:TAC). Competency will be defined as a score of 4-6 based on the rating of a randomly selected recorded session. Group MBCT is a structured mindfulness meditation program designed to help participants learn skills to reduce the risk of depression relapse or recurrence. It will be delivered over 8 weeks in weekly group sessions lasting 2 hours, with approximately 12 participants per group, and includes between-session home practice.
Participants work through the Spanish version of 'The Mindful Way Workbook: An 8-Week Program to Free Yourself from Depression and Emotional Distress' on their own, following weekly instructions and mindfulness exercises. The workbook presents the standard 8-week MBCT program in a self-guided format. It also includes reflection questions, tools to monitor progress, and feedback from people who have previously completed the program. To support engagement and manage difficulties, participants will also take part in three structured, low-intensity group support sessions with a health psychologist (at the start, mid-point, and end of the program). Each session will last 1 hour, be delivered by group videoconference, and include approximately 12 participants per group.
TAU (treatment as usual) will be delivered as it is in routine clinical practice. In Spain, ongoing care for recurrent depression commonly relies on maintenance antidepressant medication (m-ADM). Spanish National Health System guidelines recommend continuing antidepressants for at least two years at the same dose that was effective during the acute treatment phase. Participants will be advised that, if they notice a worsening of symptoms or encounter difficulties during the study, they should seek help from their primary care General Practitioner or their usual mental health service provider, as they would normally do.
Parc de Salut Mar
Barcelona, Barcelona, Spain
Parc Sanitari Sant Joan de Déu (PSSJD)
Sant Boi de Llobregat, Barcelona, Spain
Hospital Universitario Miguel Servet
Zaragoza, Zaragoza, Spain
Time from randomisation to relapse or recurrence of major depression at 12-month follow-up
The primary outcome will be the time from randomisation to relapse or recurrence of major depression at 12-month follow-up, assessed in a time-to-event analysis, with patients followed at 3 different intervals during the study period (post-treatment, as well as 6-month and 12-month follow-up after randomisation). The presence of depression between assessments will be assessed retrospectively according to the Longitudinal Interval Follow-up Evaluation (LIFE), a form of the Structured Clinical Interview for DSM-5 (SCID) designed for longitudinal studies.
Time frame: Pre-treatment, 2 months post-treatment, and 6- and 12-month follow-ups
Hamilton Depression Rating Scale (HDRS)
Depressive symptoms
Time frame: Pre-treatment, 2 months post-treatment, and 6- and 12-month follow-ups
Patient Health Questionnaire (PHQ-9)
Depressive symptoms
Time frame: Pre-treatment, 2 months post-treatment, and 6- and 12-month follow-ups
International Positive and Negative Affect Schedule Short Form (I-PANAS-SF)
Negative Affect
Time frame: Pre-treatment, 2 months post-treatment, and 6- and 12-month follow-ups
Short Warwick-Edinburgh Mental Well-Being Scale (SWEMWBS)
Mental well-being
Time frame: Pre-treatment, 2 months post-treatment, and 6- and 12-month follow-ups
EuroQoL-5D (EQ-5D-5L)
Health-related quality of life
Time frame: Pre-treatment, 2 months post-treatment, and 6- and 12-month follow-ups
Client Service Receipt Inventory (CSRI)
Use of health and social services
Time frame: Pre-treatment, 12-month follow-ups
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