One exception to this was in California, where the participating community had a higher documented incidence rate by age 4 than any of the other 10 社区. The researchers note that there are efforts to promote early identification in the area, with one program that has trained hundreds of pediatricians to utilize wellness exams to screen children and recommend evaluation as necessary.
通常, children who have intellectual disabilities are more likely to be diagnosed with autism earlier. According to the researchers, this finding suggests a need to better detect and evaluate developmental concerns beyond cognitive ability. A child was considered to have an intellectual disability if their IQ was 70 or lower or if explicitly noted during an exam.
This is especially true for Black children. Even by age 8, more than half of Black children diagnosed with autism also had an intellectual disability, 相比 35% of 8-year-olds with autism overall. Low IQ scores were also more common among Hispanic children diagnosed with autism than White children.
For these studies, CDC researchers analyzed data from 2018 for two cohorts of children: those born in 2010 谁转身 8 在 2018 and those born in 2014 谁转身 4 在 2018. The data was compiled from communities in 11 states that participate in the Autism and Developmental Disabilities Monitoring Network.
The latest data shows evidence of changing patterns in identifying autism in children by race and socioeconomic status.
在 2018, more communities saw higher prevalence rates among Black and Hispanic children than White children than in previous years. Communities with lower median household income also saw higher cumulative incidence rates of autism spectrum disorder diagnoses by age 4.
“These findings could indicate improvements in ASD (autism spectrum disorder) identification among historically underserved populations,” the researchers wrote.
The researchers note that the sample size is limited to the 11 participating communities and may not be broadly representative. 也, practices and policies differ by community, as do characteristics of the population analyzed, which may contribute to variability in findings.