[Autism spectrum disorder-like symptoms in the population with intellectual disability aged 6 to 18 years].

Objective: To investigate the incidence of autism spectrum disorder (ASD)-like symptoms in the population with intellectual disability (ID).

Methods: The students with ASD or ID, aged 6-18 years, who studied in a special school in Shanghai from January to June, 2017, as well as the typically developing (TD) population of the same age, who studied in a general school in Shanghai during the same period, were enrolled. Social Responsiveness Scale (SRS) was completed by their parents or other guardians, and the ASD-like symptoms were evaluated.