Two different versions of cognitive behaviour therapy for body dysmorphic disorder
| ISRCTN | ISRCTN96566335 |
|---|---|
| DOI | https://doi.org/10.1186/ISRCTN96566335 |
| ClinicalTrials.gov (NCT) | NCT00871143 |
| Protocol serial number | N/A |
| Sponsor | Institute of Psychiatry, Kings College London (UK) |
| Funder | Institute of Psychiatry, Kings College London (UK) - Biomedical Research Centre for Mental Health (ref: PAXKAYR) |
- Submission date
- 31/03/2009
- Registration date
- 20/10/2009
- Last edited
- 22/03/2016
- Recruitment status
- No longer recruiting
- Overall study status
- Completed
- Condition category
- Mental and Behavioural Disorders
Plain English summary of protocol
Not provided at time of registration
Contact information
Scientific
Centre for Anxiety Disorders and Trauma
99 Denmark Hill
London
SE5 8AZ
United Kingdom
| Phone | +44 (0)20 3228 3461 |
|---|---|
| david.veale@iop.kcl.ac.uk |
Study information
| Primary study design | Interventional |
|---|---|
| Study design | Single-centre single-blinded parallel-group randomised controlled trial |
| Secondary study design | Randomised controlled trial |
| Study type | Participant information sheet |
| Scientific title | A randomised controlled trial of two different versions of cognitive behaviour therapy for body dysmorphic disorder |
| Study objectives | The hypotheses to be tested are that: 1. Specific cognitive behavioural therapy (CBT) for body dysmorphic disorder (BDD) will be more effective than non-specific CBT at 12 weeks 2. Treatment effects from specific CBT will be maintained at 1 month, 3 months and 1 year follow-up |
| Ethics approval(s) | The Joint South London and Maudsley and the Institute of Psychiatry Research Ethics Committee (REC), 23/03/2009, ref: 09/H0807/9 |
| Health condition(s) or problem(s) studied | Body dysmorphic disorder |
| Intervention | CBT specific for BDD: A pilot study 12 years ago has demonstrated a significant benefit of CBT over a waiting list. The mean reduction was about 50% on the primary outcome measure (YBOCS for BDD). This consisted of a reduction of 12 points and a standard deviation of 7 on the YBOCS for BDD and the treatment is now thought to be better than in 1996. CBT not specific for BDD: Stress management and cognitive restructuring, which has been shown to be a credible alternative psychological treatment to CBT in health anxiety. However, in two pilot cases of BDD, the benefits were minimal with a reduction of between zero and 10% on the YBOCS for BDD. At the most this equates to a maximum of 3 points reduction. The treatments are provided over 12 weeks (twice a week for the first 4 weeks and once a week for 8 weeks). For CBT specific to BDD there will be three follow-up sessions at 1 and 3 months and at 1 year, making a maximum total of 19 sessions. |
| Intervention type | Other |
| Primary outcome measure(s) |
Yale Brown Obsessive Compulsive Scale (modified for BDD) (BDD-YBOCS), which will be done by a blind assessor at 12 weeks. |
| Key secondary outcome measure(s) |
Two observer-rated scales: |
| Completion date | 01/04/2011 |
Eligibility
| Participant type(s) | Patient |
|---|---|
| Age group | Adult |
| Sex | All |
| Target sample size at registration | 44 |
| Key inclusion criteria | 1. BDD is the main psychological problem. We will use Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) criteria as BDD does not exist as a separate diagnosis in the International Classification of Disease, version 10 (ICD-10). They may have an additional diagnosis of delusional disorder when it refers to beliefs about being ugly or defective. 2. They must have a total of 24 or more on the twelve-item Yale-Brown Obsessive Compulsive Scale (YBOCS) modified for BDD 3. They may be of either gender but must be 17 years or above 4. They are willing to travel to the treatment centre for weekly sessions 5. They are willing to complete regular questionnaires and be audiotaped for supervision and for listening to enhance their learning 6. They may be taking psychotropic medication so long as it is stabilised and there are no plans to increase the dose |
| Key exclusion criteria | 1. They have a current or past diagnosis of schizophrenia, bipolar affective disorder 2. They have current suicidal intent or severe self-neglect that requires hospitalisation 3. They have a current alcohol or substance dependence or anorexia nervosa or borderline personality disorder that requires treatment in its own right 4. They are currently receiving any other form of psychotherapy 5. They have received CBT for BDD in the past 6 months, which is judged as competently delivered and did not respond 6. They cannot speak sufficient English for CBT (assistance will be provided for those who speak English but are unable to read questionnaires) |
| Date of first enrolment | 01/04/2009 |
| Date of final enrolment | 01/04/2011 |
Locations
Countries of recruitment
- United Kingdom
- England
Study participating centre
SE5 8AZ
United Kingdom
Results and Publications
| Individual participant data (IPD) Intention to share | No |
|---|---|
| IPD sharing plan summary | Not provided at time of registration |
| IPD sharing plan |
Study outputs
| Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
|---|---|---|---|---|---|
| Results article | results | 01/02/2014 | Yes | No | |
| Basic results | No | No | |||
| Participant information sheet | Participant information sheet | 11/11/2025 | 11/11/2025 | No | Yes |
Editorial Notes
22/03/2016: added link to results - basic reporting.
