Diagnostic Disparities

Potential Impact of DSM-5 Criteria on Autism Spectrum Disorder Prevalence Estimates

Source: 
JAMA Psychiatry
Date Published: 
January 22, 2013
Abstract: 

Researchers found that estimates of the number of children with ASD might be lower using the current DSM-5 criteria than using the previous criteria. This study looked at information collected by CDC’s Autism and Developmental Disabilities Monitoring (ADDM) Network. This is the first population-based study in the United States to look at what effect the updated ASD criteria in the DSM-5 might have on estimates of the number of children with ASD. One of the advantages of the ADDM Network method is that it does not rely solely on the presence of an ASD diagnosis, but also includes review of records for children who have behaviors consistent with ASDs, even if they do not have a diagnosis. Because of the way the ADDM Network collects data, in the future CDC will be able to use both the previous DSM-IV-TR and the current DSM-5 criteria to estimate the number of children with ASD. CDC will also continue to evaluate the effect of using the DSM-5 on trends in how doctors and other health professionals diagnose ASD and how service providers evaluate and document symptoms as they transition to using the new criteria.

Study Finds that a Subset of Children with Autism may be Misdiagnosed

Source: 
Journal of Autism and Developmental Disororders
Date Published: 
September 18, 2013
Abstract: 

A study by researchers with the UC Davis MIND Institute studied children with chromosome 22q11.2 deletion syndrome, who as a group have a prevalence of autism between 20 and 50 percent according to parent reports. This study found that these children may be getting misdiagnosed because the symptoms of the chromosome 22q11.2 deletion syndrome, including social impairments, are very similar to symptoms of autism.

Brain Imaging Study Suggests Autism and Asperger's Syndrome May Be Biologically Distinct Conditions

Source: 
BMC Medicine
Date Published: 
June 26, 2012
Abstract: 

A brain imaging study out of Boston Children's Hospital suggests that autism and Asperger's syndrome are biologically distinct conditions. The study analyzes the patterns of brain connectivity in children with ASD and found that children with autism might have distinct neural signaling patterns. This study follows the release of the APA's new DSM-5 that classifies Asperger's under an umbrella diagnosis of ASD.

News Article: http://www.medicaldaily.com/aspergers-syndrome-and-autism-are-biological...

New DSM Brings Change, Assurances For Those With Autism

Source: 
Disability Scoop
Date Published: 
May 19, 2013
Abstract: 

With the release of the DSM-5 comes an updated definition of autism and a major change to the way it is diagnosed.

How Autism Is Different in Girls Versus Boys

Source: 
The Wall Street Journal
Date Published: 
May 7, 2013
Abstract: 

"Why do boys get diagnosed with autism four times as often as girls? New research, including some of the latest data from the International Society for Autism Research annual conference last week, addresses this question, one of the biggest mysteries in the field."

Frequency and Pattern of Documented Diagnostic Features and the Age of Autism Identification

Source: 
Journal of the American Academy of Child & Pediatric Psychiatry
Date Published: 
February 6, 2013
Abstract: 

The age at which a child with autism is diagnosed is related to the particular suite of behavioral symptoms he or she exhibits, according to this study led by an ASF Grantee. Certain diagnostic features, including poor nonverbal communication and repetitive behaviors, were associated with earlier identification of an autism spectrum disorder. Displaying more behavioral features was also associated with earlier diagnosis.

For more information about this study, read the guest blog from the lead author here: http://autismsciencefoundation.wordpress.com/2013/04/09/identifying-asd-...

Evaluating Changes in the Prevalence of the Autism Spectrum Disorders (ASDs)

Source: 
Public Health Reviews
Date Published: 
March 14, 2013
Abstract: 

In effort to stimulate more research to better understand ASD trends, ASF President Alison Singer and other stakeholders discuss the increase in ASD prevalence and share their knowledge and opinions.

The Modified Checklist for Autism in Toddlers: Reliability in a Diverse Rural American Sample

Source: 
Journal of Autism and Developmental Disorders
Date Published: 
February 6, 2013
Abstract: 

Researchers at Virginia Tech examine M-CHAT performance in a very low socio-economic status setting and find it lacks internal consistency across ethnic and educational groups. Caregivers who reported a low maternal educational level or with minority status were more likely to mark items suggestive of autism compared to those with higher maternal education or non-minority status

How Different Are Girls and Boys Above and Below the Diagnostic Threshold for Autism Spectrum Disorders?

Source: 
Journal of the American Academy of Child and Adolescent Psychiatry
Date Published: 
August 2012
Abstract: 

A study finds that despite showing similar autistic traits, girls are less likely than boys to meet diagnostic criteria for ASD if no other intellectual or behavioral issues are present. The authors suggest the results might reflect biased diagnosis or better adaptation in girls.