Prevalence

CDC Releases 2014 Community Report on Autism

Source: 
Centers for Disease Control and Prevention
Date Published: 
April 11, 2014
Abstract: 

The CDC has released its 2014 Community Report on Autism, which gives details behind the new 1 in 68 number, as well as additional state-by-state prevalence information.

How to Think About the Risk of Autism

Source: 
New York Times
Date Published: 
March 29, 2014
Abstract: 

When it comes to autism prevalence, it can be difficult to separate real risks from false rumors. The topics that gain the most media coverage aren't always the ones with the greatest affect on autism risk. The risk ratio can give perspective where isolated news stories don’t.

CDC: 1 in 68 Children has an Autism Spectrum Disorder

Date Published: 
March 27, 2014
Abstract: 

The Centers for Disease Control and Prevention (CDC) today reported that 1 in 68 children is diagnosed with an autism spectrum disorder. This new estimate is roughly 30 percent higher than previous estimates reported in 2012 of 1 in 88 children.

Proportion of children with ASD and above average IQ on the rise
 
The Centers for Disease Control and Prevention (CDC) today reported that 1 in 68 children is diagnosed with an autism spectrum disorder. This new estimate is roughly 30 percent higher than previous estimates reported in 2012 of 1 in 88 children. The number of children identified with ASD ranged from 1 in 175 children in Alabama to 1 in 45 children in New Jersey. 
 
The surveillance summary report, “Prevalence of Autism Spectrum Disorder among Children Aged 8 Years – Autism and Developmental Disabilities Monitoring Network, 11 Sites, United States, 2010,” was published today in the CDC’s Morbidity and Mortality Weekly Report.  Researchers reviewed records from community sources that educate, diagnose, treat and/or provide services to children with developmental disabilities. 
 
The data continue to show that ASD is almost five times more common among boys than girls:  1 in 42 boys versus 1 in 189 girls. White children are more likely to be identified as having ASD than are black or Hispanic children.
 
Levels of intellectual ability vary greatly among children with autism, ranging from severe intellectual challenges to average or above average intellectual ability.  The study found that almost half of children identified with ASD have average or above average intellectual ability (an IQ above 85) compared to a third of children a decade ago.
 
"The data are important because they help us plan for the types of services we should be building based on the needs of the kids" said Alison Singer, President of the Autism Science Foundation.  "People with autism and intellectual disability have very different services and supports needs than people with autism who don't have intellectual disability.  The data also drive research . We learned nothing from this data about what causes autism or what causes different types of autism, but the data provide important clues about how we should be approaching those questions."
 
The report also shows most children with ASD are diagnosed after age 4, even though ASD can be diagnosed as early as age 2. 
 
“The most important thing for parents to do is to act early when there is a concern about a child’s development,”said Marshalyn Yeargin-Allsopp, M.D., chief of CDC’s Developmental Disabilities Branch. “If you have a concern about how your child plays, learns, speaks, acts, or moves, take action. Don’t wait.”

A Higher Mutational Burden in Females Supports a “Female Protective Model” in Neurodevelopmental Disorders

Source: 
American Journal of Human Genetics
Date Published: 
February 27, 2014
Abstract: 

Researchers have more clues as to why more boys than girls are diagnosed with Autism Spectrum Disorder. A new study in the American Journal of Human Genetics suggests that for boys, it takes less of a genetic hit to cause autism than it does for girls. The study continues to say that when it does appear in girls, it is due to a much more severe genetic hit, usually resulting in much more severe autism symptoms.

Neurobehavioural Effects of Developmental Toxicity

Source: 
The Lancet
Date Published: 
February 14, 2014
Abstract: 

Neurodevelopmental disabilities, including autism, attention-deficit hyperactivity disorder, dyslexia, and other cognitive impairments, affect millions of children worldwide, and some diagnoses seem to be increasing in frequency. A new study in The Lancet states that industrial chemicals that injure the developing brain are among the known causes for this rise in prevalence. Building on a 2006 study in which researchers identified five industrial chemicals as developmental neurotoxicants (lead, methylmercury, polychlorinated biphenyls, arsenic, and toluene), epidemiological studies have documented six additional developmental neurotoxicants — manganese, fluoride, chlorpyrifos, dichlorodiphenyltrichloroethane, tetrachloroethylene, and the polybrominated diphenyl ethers. To protect children from exposure to such harmful chemicals, researchers say that untested chemicals should not be presumed to be safe to brain development.

Study Links Autism and Somalis in Minneapolis

Source: 
New York Times
Date Published: 
December 16, 2013
Abstract: 

A long-awaited study has confirmed the fears of Somali residents in Minneapolis that their children suffer from higher rates of a disabling form of autism compared with other children there. The study — by the University of Minnesota, the Centers for Disease Control and Prevention, and the research and advocacy group Autism Speaks — found high rates of autism in two populations: About one Somali child in 32 and one white child in 36 in Minneapolis were on the autism spectrum. But the Somali children were less likely than the whites to be “high-functioning” and more likely to have I.Q.s below 70. (The average I.Q. score is 100.) The study offered no explanation of the statistics.

Autism Rates Rise in US, but Level Off in UK

Source: 
BMJ Open
Date Published: 
October 16, 2013
Abstract: 

Autism rates in the United Kingdom appear to have leveled off between the years 2000 and 2010 after a five-fold rate increase in the 1990s. The report, published in the journal BMJ Open, does not have any conclusive answers as to why there was such a dramatic increase in autism diagnosis in the 1990s, but it does state that any link between autism and vaccines has been ruled out. This BMJ Open report is being compared to a report released by the CDC last year that found rates of autism diagnosis in the United States increased 78 percent between 2004 and 2008.

Kids with Cerebral Palsy More Likely to Have Autism

Source: 
Centers for Disease Control and Prevention
Date Published: 
October 1, 2013
Abstract: 

New research from the CDC and published in the journal Developmental Medicine & Child Neurology found significantly high rates of autism among children diagnosed with cerebral palsy. Of the 147,000 children studied, seven percent of the children with cerebral palsy were also diagnosed with autism, compared to a little greater than one percent of kids who have autism in the general population.

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.

Excess Mortality and Causes of Death in Autism Spectrum Disorders: A Follow Up of the 1980s Utah/UCLA Autism Epidemiologic Study

Source: 
J Autism Dev Disord
Date Published: 
May, 2013
Year Published: 
2013
Abstract: 

This study's purpose was to investigate mortality among individuals with Autism Spectrum Disorders (ASD) ascertained during a 1980s statewide autism prevalence study (n = 305) in relation to controls.