The World Health Organization (WHO) defines depression as a widespread mental health condition characterised by a persistently low mood or a lack of enjoyment and interest in activities over extended periods. Unlike normal fluctuations in mood and everyday feelings, depression significantly impacts various areas of life, including personal relationships with family, friends and the broader community.¹

Around 280 million people worldwide suffer from depression. Depression can create challenges in life quality, work, school and community. Each year, over 700,000 individuals lose their lives to suicide. Among those aged 15 to 29, suicide ranks as the fourth most common cause of death.^1,2

Dialectical Behaviour Therapy (DBT) is a scientifically supported form of psychotherapy and is considered part of the third wave of cognitive-behavioural therapies (CBT). While CBT primarily emphasises altering thought patterns, DBT places a strong emphasis on both accepting and modifying behaviours. This approach was created by Dr Marsha Linehan and her team in the late 1980s.

Its core principles are designed to help individuals cultivate healthier ways of thinking and effective techniques for managing their emotions. Initially designed as a treatment for those with emotionally unstable personality disorder (EUPD), DBT has evolved into a prominent therapy option for individuals who face challenges with emotional regulation and instability.³

What is dialectical behaviour therapy?

DBT and CBT for depression both focus on the connection between thoughts, emotions and behaviours. Therapists collaborate with patients to recognise, understand, and replace harmful or unhelpful thoughts and behaviours with more positive and constructive ones. In addition to this, DBT includes specialised skill-building modules that concentrate on mindfulness, managing emotions, tolerating distress, and improving interpersonal relationships.

DBT is grounded in dialectical philosophy, which emphasises the synthesis of opposites. The term "dialectical" refers to the integration of two opposing ideas to find a balanced, middle path. In DBT, this concept is reflected in the balance between acceptance and change. The therapy focuses on validating patients' experiences and emotions while simultaneously encouraging them to adopt healthier, more adaptive behaviours.^5,6

DBT consists of four primary components:

• Individual therapy: One-on-one sessions between a therapist and the patient, focusing on specific problems and goals
• Skills training group: A group setting where patients learn and practice skills related to mindfulness, distress tolerance, emotion regulation, and interpersonal effectiveness
• Phone coaching: Therapists provide support via phone calls to help patients use DBT skills in real-life situations
• Therapist consultation team: A support group for therapists to maintain their motivation and ensure adherence to DBT principles^4,5

Components of DBT and their relevance to depression

Mindfulness

Mindfulness is the foundational skill in DBT, emphasising the importance of being present in the moment without judgment. For individuals with depression, mindfulness helps break the cycle of negative thinking by fostering awareness of current experiences and feelings. Depressive episodes often involve rumination—repetitive, negative thoughts that reinforce feelings of sadness and hopelessness. By practising mindfulness, people learn to observe their thoughts and feelings without getting caught up in them, reducing the intensity and frequency of depressive episodes.

Depression is frequently accompanied by self-criticism and guilt, which can exacerbate depressive symptoms. Through mindfulness, individuals develop self-compassion, learning to accept their thoughts and feelings without harsh self-judgment.

Distress tolerance

Distress tolerance skills focus on helping patients cope with intense emotional pain without resorting to self-destructive behaviours. People with depression often experience overwhelming feelings of sadness, hopelessness, and despair, leading to behaviours like self-harm, substance abuse or suicidal ideation. Distress tolerance techniques provide alternative ways to manage these emotions safely and constructively.

Skills in this module include crisis survival strategies like "STOP" (Stop, Take a step back, Observe, Proceed mindfully), self-soothing techniques using the five senses, and distraction methods. By learning these skills, patients can face emotional crises without making impulsive decisions that might worsen their depression. Over time, increased distress tolerance can reduce the frequency and intensity of depressive episodes.

Emotion regulation

Emotion regulation skills help patients understand and manage their emotions more effectively. Depression is often associated with emotional dysregulation, where individuals experience intense emotional responses that are difficult to control. This module teaches patients to identify and label their emotions accurately, which is a critical step in managing them. By increasing emotional awareness, patients gain insight into the triggers of their depression and the patterns of their emotional responses.

DBT’s emotion regulation strategies include increasing positive emotions through pleasant activities, opposite action (engaging in behaviours opposite to what the emotion urges), and problem-solving techniques. For instance, if a patient feels overwhelmed by sadness, they might practice the opposite action by engaging in a physical activity or reaching out to a friend, counteracting the urge to withdraw and isolate. Over time, these skills help reduce emotional vulnerability, leading to more stable and manageable mood states.

Interpersonal effectiveness

Depression often affects relationships, leading to isolation, conflicts and difficulties in communication. Interpersonal effectiveness skills in DBT focus on improving communication and relationship-building abilities. These skills help individuals express their needs and set boundaries while maintaining healthy relationships. Techniques such as DEAR MAN (Describe, Express, Assert, Reinforce, Mindful, Appear confident, Negotiate) are taught to help patients navigate interpersonal interactions more effectively.

By enhancing interpersonal skills, patients can reduce feelings of loneliness and isolation, which are common in depression. Improved relationships also provide a support network that can act as a protective factor in depressive episodes. Building and maintaining positive relationships can contribute to a sense of belonging and purpose, critical components of mental well-being.⁶

DBT in treating depression

Research has demonstrated that DBT is effective in treating various forms of depression, particularly when other treatments have failed. This includes individuals with treatment-resistant depression, chronic depression, or depression co-occurring with other disorders, such as borderline personality disorder, eating disorders, or substance abuse³. The main components of DBT that contribute to its success in treating depression are:

• Comprehensive skill set: DBT is a combination of mindfulness, distress tolerance, emotion regulation and interpersonal effectiveness which equips patients with a useful set of skills to manage depressive symptoms. This holistic approach addresses various aspects of depression, including emotional dysregulation, negative thinking and interpersonal problems
• Validation and change: The dialectical approach of balancing acceptance with change is particularly effective for depression. Validating patients’ experiences helps reduce negative feelings such as shame and self-blame, while the emphasis on change empowers patients to take active steps towards recovery
• Structure and consistency: DBT’s structured format provides consistency and predictability, which can be comforting for individuals with depression. The regular schedule of therapy sessions, skills training groups and phone coaching sessions ensures continuous support and guidance, reducing the likelihood of non-compliance
• Empirical support: Numerous studies have supported the efficacy of DBT for depression. For instance, research has shown that DBT reduces depressive symptoms, improves emotional regulation, and enhances overall quality of life. It has also been found effective in reducing suicidal ideation
• Adaptability: DBT can be adapted to suit different populations and settings, making it a versatile option for depression treatment. For example, DBT skills training can be integrated into group therapy for adolescents, adapted for use in inpatient settings or tailored for individuals with co-occurring substance use disorders^4,6

Challenges and limitations of DBT in depression

While DBT is a powerful tool for treating depression, there are some challenges to take into account:

• Intensity of treatment: DBT is a time-intensive therapy, requiring regular attendance at individual therapy sessions and skills training groups. This level of commitment can be challenging for individuals with severe depression who may find this overwhelming or struggle with motivation and energy
• Accessibility: DBT requires specialised training, and there may be a limited number of qualified DBT therapists available, particularly in rural or underserved areas. This can create problems in access
• Complexity of skills: DBT skills can be complex and may require significant practice to master. Individuals with cognitive impairments or severe depression may find it challenging to engage fully in skills training
• Cost: The comprehensive nature of DBT can make it more expensive than other forms of therapy, potentially limiting access for individuals with financial constraints^3,6

Summary

• DBT offers an effective and evidence-based approach to treating depression
• It addresses emotional dysregulation and negative thinking patterns by teaching mindfulness, distress tolerance, emotion regulation, and interpersonal effectiveness skills
• The balance between acceptance and change empowers patients to take control of their mental health while validating their experiences
• Drawbacks of DBT include accessibility, intensity of treatment and cost
• As ongoing research continues to demonstrate the effectiveness of DBT, its use in treating depression is expected to grow, bringing hope and recovery to many people worldwide