Incidence of Autism

Regional cerebral blood flow in childhood autism: a SPET study with SPM evaluation

“…The prevalence of autism varies from nation to nation, with a low rate in Germany (2 out of 10 000) and high rate in Japan (16-20 out of 10 000). Autism is three times more likely to affect males than females, and this gender difference is common to many developmental disabilities [3][4][5].…”

Parenting Stress in Mothers of Children With Autism Spectrum Disorders

“…The number of children diagnosed with ASD has been rising, perhaps due to better assessment and diagnosis in recent years. ASD is a worldwide disorder that crosses all racial, ethnic, cultural, and social boundaries (Belfer, 2008), and occurs four times more often in boys than in girls (Fischer, 2005; Filipek et al., 2000; Grinker, 2007).…”

Defining Autism Spectrum Disorders

“…A consensus has emerged that autistic disorder and related disorders are now thought of as a spectrum disorder, labeled as ASD. While all children with diagnoses under the ASD umbrella demonstrate the same core deficits, these symptoms are manifested in a wide variety of ways, ranging from those who are very severely affected with many characteristics to those who show only mild effects with fewer characteristics or who remain nearly normal (Fisher, 2005). For example, the level of intellectual function can range from profound mental retardation through the superior range on conventional IQ tests, although about 40% of children have some level of retardation.…”

“…Thus, approximately 1 in 150 children in the United States have ASD, and the numbers are increasing internationally as well (Belfer, 2008; World Health Organization, 2006). In addition, many people with ASD may still remain unidentified (Filipek et al., 1999; Fisher, 2005; Wing & Potter, 2002). It is important to note that ASD crosses all racial, ethnic, and social boundaries, and it occurs four times more often in boys than in girls (Belfer, 2008; Filipek et al., 2000; Sugiyama & Abe, 1989).…”