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Gastrointestinal symptoms are a common comorbidity in patients with autism spectrum disorders (ASD), even though the underlying mechanisms are largely unknown. The most common gastrointestinal symptoms reported by proprietary tool developed and administered by Mayer, Padua, and Tillisch (2014) are abdominal pain, constipation, diarrhea and ...
Gastrointestinal disease are a common comorbidity in patients with autism spectrum disorders, even though the underlying mechanisms are largely unknown. The most common gastrointestinal symptoms reported are abdominal pain, constipation, diarrhea and bloating, reported in at least 25 percent of patients. [102]
The division of comorbidity as per syndromal and nosological principles is mainly preliminary and inaccurate, however it allows us to understand that comorbidity can be connected to a singular cause or common mechanisms of pathogenesis of the conditions, which sometimes explains the similarity in their clinical aspects, which makes it difficult ...
The most common reason parents reported as the cause of lost ASD diagnosis was new information about the child (73.5%), such as a replacement diagnosis. Other reasons included a diagnosis given so the child could receive ASD treatment (24.2%), ASD treatment success or maturation (21%), and parents disagreeing with the initial diagnosis (1.9%).
Parents carrying the deletion often have no history of intellectual disability or autism spectrum disorder. [ 1 ] [ 2 ] [ 10 ] Prevalence of 16p11.2 deletion syndrome was initially estimated to be 3 in 10,000 in the general population, [ 3 ] [ 11 ] though more recent estimates have increased to 1 in 2,000.
As diagnosis is increasingly being given to people with higher functioning autism, there is a tendency for the proportion with comorbid intellectual disability to decrease over time. In a 2019 study, it was estimated that approximately 30–40% of people diagnosed with ASD also have intellectual disability. [ 265 ]
The Autism – Tics, ADHD, and other Comorbidities Inventory (A–TAC) is a psychological measure used to screen for other conditions occurring with tics. [ 1 ] [ 2 ] Along with tic disorders , it screens for autism spectrum disorders, attention deficit hyperactivity disorder (ADHD) and other conditions with onset in childhood. [ 1 ]
Other neurodevelopmental conditions are common comorbidities. Autism spectrum disorder (ASD), co-occurring at a rate of 21% in those with ADHD, affects social skills, ability to communicate, behaviour, and interests. [77] [78] Learning disabilities have been found to occur in about 20–30% of children with ADHD.