Concentrated therapy for childhood OCD: what the Clínic study found
A Hospital Clínic Barcelona trial randomly assigned 30 unmedicated children and adolescents with OCD: 15 received concentrated cognitive behavioural therapy and 15 were placed on a waiting list. The intervention provided about 20 hours over no more than four weeks. The average symptom score fell by around 30% in the treated group, and naturalistic follow-up continued for six months. The sample is too small to establish that this format is equivalent or superior to weekly therapy.
What they did
OCD affects approximately 1% of children and adolescents and can interfere substantially with daily life. Cognitive behavioural therapy with exposure and response prevention is a recommended treatment, but access and attendance over several months can be difficult for some families.
Researchers at Clínic-IDIBAPS, led by Dr Miquel A. Fullana and Dr Luisa Lázaro, with Dr Laura Hermida as first author, tested an alternative: the same therapy, concentrated. Twenty hours in total, in sessions of an hour and a half, spread over a maximum of four weeks.
Thirty children and adolescents aged 7 to 17 took part, none of them on medication, randomly assigned to the treatment group or to a waiting list.
What they found
- Symptoms dropped by an average of 30% on the scale used to measure childhood OCD (CY-BOCS).
- The improvement held at the three- and six-month follow-ups.
- The youngest responded best. Children aged 7 to 12 improved more than adolescents.
- Those who started worse had more room to improve.
- At the end of the study, the same treatment was offered to those on the waiting list, with very similar results.
What it means
The study shows that the team could deliver this protocol over four weeks and detect a reduction in symptoms compared with a waiting list. It did not compare concentrated treatment with the same amount of therapy distributed over several months, so it cannot show which is completed more often or which works better.
The analysis found a better average response among participants aged 7 to 12 than among adolescents. This was an exploratory finding in very small subgroups and needs replication; it does not show that treatment is ineffective in adolescence.
What it does NOT mean
- It isn't a new treatment. It's the same one — cognitive behavioural therapy with exposure and response prevention — delivered more intensively. There's no miracle pill and no revolutionary technique: there's a quicker format of what we already know works.
- It is not conclusive. Thirty young people took part and the comparison was a waiting list, not another active treatment. Larger trials need to compare formats and examine age-related results.
- It doesn't mean you can do it yourself. Concentrated therapy is therapy: it's delivered by professionals trained in OCD. Exposure done badly at home doesn't help; it can do harm.
Frequently asked questions
Can I ask for this therapy for my child?
You can ask about cognitive behavioural therapy with exposure and response prevention, which is the first-line treatment. The concentrated format is still being studied and isn't available everywhere.
Is a 30% improvement a lot?
It describes the average reduction in the treated group’s score. It does not mean that everyone improved by 30%, reached remission or did better than they would with weekly therapy.
What if my child is on medication?
This study was done with children who weren't, so it says nothing about those who are. Talk to their professional.
Hermida-Barros, L., et al. (2025). Concentrated Cognitive-Behavior Therapy for Unmedicated Children and Adolescents with Obsessive-Compulsive Disorder in Routine Clinical Care: A Randomized Controlled Trial with a 6-month Naturalistic Follow-up. Behavior Therapy. doi.org/10.1016/j.beth.2025.01.001
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