ASD begins before the age of 3 years and can last throughout a person's life, although symptoms may improve over time. Some children show ASD symptoms within the first 12 months of life. In others, symptoms may not show up until 24 months of age or later.
However, autism symptoms can show up later in higher-functioning individuals when they're under more demand or challenge, making an adult autism diagnosis possible. In addition, some adults who were not diagnosed in childhood may be later diagnosed in adulthood.
Older children, teens, and adults do not suddenly develop autism. Autism is a neurotype some people are born with that causes behavioral and social communication problems. According to the Centers for Disease Control and Prevention, one in 44 children are diagnosed with autism.
Most children with autism are not diagnosed until after age 3, even though health care providers can often see developmental problems before that age. Research shows that early detection and early intervention greatly improve outcomes,10 so it's important to look for these symptoms when a child is as young as possible.
Children can be misdiagnosed as having Autism Spectrum Disorder (ASD) and not actually be autistic. It is concerning enough for a parent to be told their child is on the Autism Spectrum, but for a child to be misdiagnosed as having autism can cause unnecessary stress and worry for the family.
Many individuals with high-functioning autism are diagnosed later in life. Their autism often goes unnoticed due to average or higher than average intellect. Furthermore, in order to fit in many individuals with autism work very hard to mask or hide their autistic traits.
Since autism is less prevalent in females, autism was always thought to be passed down from the mother. However, research suggests that autism genes are usually inherited from the father.
There are many different factors that have been identified that may make a child more likely to have ASD, including environmental, biologic, and genetic factors.
If the information from the M-CHAT suggests your child displays “red flags” for ASD, approach your healthcare provider with the information and determine if a full diagnostic evaluation is warranted. It's never too late – interventions can be effective at all ages.
A recent study by Roberts et al. (2015) found a strong association between trauma, PTSD and autistic traits (which may have been sub-clinical) in adult women. This association was highest amongst those women with the most severe autistic traits.
Level 1 is the mildest, or “highest functioning” form of autism, which includes those who would have previously been diagnosed with Asperger's syndrome. Individuals with ASD level 1 may have difficulty understanding social cues and may struggle to form and maintain personal relationships.
While some people with autism merely yell or stamp, many really do become overwhelmed by their own emotions. 3 Bolting, hitting, self-abuse, crying, and screaming are all possibilities. These can be particularly frightening—and even dangerous—when the autistic individual is physically large.
While ADHD can make it difficult to focus, sit still, or control impulses, autism can limit a person's scope of interests or affect social skills and learning abilities. ADHD and autism often share symptoms, like difficulty communicating or concentrating. Additionally, it's possible that the conditions are connected.
It is estimated that 1 in 100 people in Australia have Autism. In 2018 there were 205,200 Australians with Autism, a 25.1% increase from the 164,000 in 2015 (Source: ABS SDAC 2018– Autism in Australia). This means that if you have Autism you are not alone.
Having a family health history of ASD makes you more likely to have a child with ASD, or to have ASD yourself. If you have a child with ASD, you are more likely to have another child with ASD, especially if you have a daughter with ASD or more than one child with ASD.
There's no way to prevent autism spectrum disorder, but there are treatment options. Early diagnosis and intervention is most helpful and can improve behavior, skills and language development. However, intervention is helpful at any age.
Some developmental health professionals refer to PDD-NOS as “subthreshold autism." In other words, it's the diagnosis they use for someone who has some but not all characteristics of autism or who has relatively mild symptoms.
A child with a speech delay tends to naturally use body language and eye contact. Autistic children, on the other hand, may have trouble with social interaction, play skills, communication, and behavior. Children with autism may prefer to be alone.
Some individuals with borderline autism may be referred to as “high-functioning” autistic. This may because they live independently, function or functioned well at school and/or work, and do not have any observable behaviors such as those exhibited through language or developmental delays.