Psychiatr Serv. 2010 Aug;61(8):822-9.
Age of diagnosis among medicaid-enrolled children with autism, 2001-2004.
Mandell DS, Morales KH, Xie M, Lawer LJ, Stahmer AC, Marcus SC.
OBJECTIVE: This study examined child- and county-level factors associated with age of diagnosis of autism among Medicaid-enrolled children and the change in age of diagnosis over time. METHODS: National Medicaid claims from 2002 to 2004 were used to identify age of diagnosis and characteristics of children younger than ten years old with a diagnosis of autism (ICD-9 codes 299, 299.0x, or 299.8x). These data were linked to county-level education and health care variables. Linear regression with random effects for state and county was used to examine associations between these variables and age of diagnosis. RESULTS: A total of 28,722 Medicaid-enrolled children newly diagnosed with an autism spectrum disorder were identified. Their average age of diagnosis was 64.9 months. Adjusted average age of diagnosis dropped 5.0 months for autistic disorder and 1.8 months for other spectrum disorders during the study period. Asian children were diagnosed earlier than children in other racial or ethnic groups, although these differences were much more pronounced for other spectrum disorders than for autistic disorder. Children eligible for Medicaid through the poverty category were diagnosed earlier, on average, than children who were eligible through disability, foster care, or other reasons, although this difference decreased over time. Children in large urban or rural counties were diagnosed later than children in small urban or suburban counties. CONCLUSIONS: Findings showed that diagnosis of autism occurs much later than it should among Medicaid-enrolled children, although timeliness is improving over time. Analyses suggest that most of the observed variation is accounted for by child-level variables, rather than county-level resources or state policies.
PMID: 20675842 [PubMed – in process]
The age of diagnosis in California for the general population was 3 years by 2000 (falling from 6 in 1992) according to a recent paper by Bearman’s group at Columbia. Why are medicaid children diagnosed later?
I find it odd that children on medicaid due to poverty are diagnosed earlier than children “eligible through disability, foster care, or other reasons”. Naively, I would expect the opposite: that children already identified with a disability would be under greater scrutiny and more likely to receive evaluations to determine an ASD diagnosis.
Much more can be said about this, but I will stop with “Diagnosis of autism occurs much later than it should among Medicaid-enrolled children”. This is just wrong. We as a society should take better care of our most vulnerable.
If you want to reference this post in your site, use the code below to link to me from your website.
<a href="http://leftbrainrightbrain.co.uk/2010/08/diagnosis-of-autism-occurs-much-later-than-it-should-among-medicaid-enrolled-children/">Diagnosis of autism occurs much later than it should among Medicaid-enrolled children</a>