The likelihood that an autistic person has another condition correlates strongly with the age at which they received their autism diagnosis. Also, autistic girls are more likely than autistic boys to have another condition, according to a new study.
Among people diagnosed late, at 11 to 15 years old, 26 percent of girls and 13 percent of boys were also diagnosed with an affective disorder, the study found. An opposite trend occurred for intellectual disability; 40 percent of people with an early autism diagnosis had an intellectual disability, compared with just 10 percent of people with a late autism diagnosis.
