Patients who have been taking antidepressants for at least six weeks will be invited to participate in the trial and receive either CBT in addition to their medication, or continue with usual care from their general practitioner (including medication). Both groups will be followed up for 12 months to see which approach is the most effective in reducing depressive symptoms and improving quality of life. Recruitment for the trial is due to start in the autumn.
The Bristol team, in partnership with researchers from the University of Exeter, the Peninsula Medical School, the University of Glasgow and Avon and Wiltshire Mental Health Partnership, will also evaluate the cost-effectiveness of the treatment and patients' views and experiences of it.
Dr Nicola Wiles said: “CBT has been shown to help patients with depression but there is currently little evidence about what alternative treatment options doctors should discuss with patients who do not get better with antidepressants. Improving access to psychological therapies is a Government priority, so it is important that we conduct studies such as this to help inform the care of people with depression.”
This trial is one of three new research projects being funded by the NIHR HTA programme to expand the evidence base surrounding the effectiveness of CBT for the treatment of depression. A combination of psychotherapy and behavioural therapy, CBT works by changing people's attitudes and behaviour by focusing on their thoughts, beliefs and attitudes and how these relate to the way they behave. Existing research suggests that CBT may be effective in tackling depression, but more evidence is needed.