Is body dysmorphic disorder part of OCD? What the evidence says

In the current diagnostic manual, body dysmorphic disorder (BDD) sits in the same chapter as obsessive-compulsive disorder (OCD), among the "obsessive-compulsive and related disorders". There are good reasons for the grouping: BDD and OCD share the pattern of intrusive preoccupations followed by repetitive behaviours done to relieve the distress. But the question of how BDD really relates to OCD — and to other conditions like depression and eating disorders — has stayed open. This study tested it directly in young people.

What the research looked at

Using questionnaires completed by 3,149 Australian adolescents, the authors used a statistical method called confirmatory factor analysis to compare different models of how BDD symptoms fit alongside symptoms of OCD, depression, anxiety and eating disorders. They tested whether the established ways of grouping these symptoms actually matched the data, and whether the pattern looked different in boys and girls.

What it found

The theoretical models the researchers tested — including ones that would place BDD neatly inside an OCD-related grouping — did not fit the data well. The model that fit best was a different one: BDD symptoms formed their own distinct factor, related to, but separate from, both an affective (mood and anxiety) factor and an eating-disorder factor.

There were also clear differences between boys and girls. The way symptoms loaded together was not the same across the sexes, and some of the relationships between conditions differed by sex as well. This was the first study to statistically test these competing models of BDD classification.

The authors were careful about the limits — the data were collected at a single point in time, and the study did not capture the full range of related conditions. But the central finding was that BDD has features of its own that are not fully captured by treating it as a variant of OCD, and that any model of BDD should take development and sex into account.

What this means

For clinicians and referrers, the practical implication is that BDD deserves to be recognised and assessed in its own right, not assumed to be simply a form of OCD. The two overlap, and that overlap is real and useful to understand — but BDD also carries distinct features, sits close to mood and eating concerns, and may present differently in young men and young women.

For anyone living with appearance-related distress, the message is similar: BDD is its own recognised condition, and the assessment and treatment that fit it are specific. Getting the picture right at assessment is what makes the treatment fit.

Reference Schneider, S. C., Baillie, A. J., Mond, J., Turner, C. M., & Hudson, J. L. (2018). The classification of body dysmorphic disorder symptoms in male and female adolescents. Journal of Affective Disorders, 225, 429–437. https://doi.org/10.1016/j.jad.2017.08.062

Co-authored by Dr Cynthia Turner, Clinical Psychologist, The Moore Centre.

This article is general information, not a substitute for individual assessment. If OCD or body-image concerns are affecting day-to-day life, get in touch — we see children, adolescents and adults in person at the Annerley rooms, by telephone, or by Zoom.