Szatmari et al (1989) studied a group of 24 children. He discovered that 8% of the children with Asperger syndrome and 10% of the children with high-functioning autism were diagnosed with OCD. This compared to 5 per cent of the control group of children without autism but with social problems. Thomsen el at (1994) found that in the children he studied, the OCD continued into adulthood.