Characterizing Health Disparities in the Age of Autism Diagnosis in a Study of 8-Year-Old Children.
Language delay plus higher family income cuts autism diagnosis time by almost two years — cast a wide net so poor kids aren’t left behind.
01Research in Context
What this study did
Chandni and team dug through U.S. autism tracking records. They looked at 8-year-olds who got an autism label.
They used a stats tool called latent class analysis. It groups kids by traits like early language delay and family income.
What they found
Kids with both language delays and higher SES got the autism label about 20 months sooner than other kids.
Language delay plus money and education sped things up. Without those, diagnosis dragged.
How this fits with other research
Goodwin et al. (2017) asked a similar question. They also saw language delay matter, but found it did not hurt later adaptive skills. Same predictor, different outcome — the stories fit together.
Goodwin et al. (2019) went further. Parents recalled just as many early red flags in late-diagnosed kids. Chandni shows the gap; Anthony explains why — subtle signs get missed.
Huang et al. (2021) moved the lens to adults. Women and non-English speakers there also faced late diagnosis. The SES and gender gap repeats across the lifespan.
Why it matters
Watch for language delays in every family, rich or poor. A quiet toddler from a well-off home may still hit your radar faster, while a chatty but quirky kid from a low-income home can wait years. Add broad screeners and track parent words like “not talking” regardless of address. Push for eval even when signs feel mild.
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02At a glance
03Original abstract
The diagnosis of autism spectrum disorder (ASD) is often delayed from the time of noted concerns to the actual diagnosis. The current study used child- and family-level factors to identify homogeneous classes in a surveillance-based sample (n = 2303) of 8-year-old children with ASD. Using latent class analysis, a 5-class model emerged and the class memberships were examined in relation to the child's median age at ASD diagnosis. Class 3, with known language delays and a high advantage socioeconomically had the lowest age of ASD diagnosis (46.74 months) in comparison to Classes 1 (64.99 months), 4 (58.14 months), and 5 (69.78 months) in this sample. Findings demonstrate sociodemographic and developmental disparities related to the age at ASD diagnosis.
Journal of autism and developmental disorders, 2018 · doi:10.1007/s10803-018-3500-6