Children may be receive an autism diagnosis by age two, but a more definite diagnosis may come several years later.
The American Academy of Pediatrics recommends all children be screened for autism between 18 and 24 months to possibly benefit from the option of early intervention therapies, like ABA therapy. A child can be diagnosed with autism spectrum disorder (ASD) at an early age, about 14 to 16 months, though many parents do not receive a definite diagnosis till much later. Parents may notice atypical behaviors or developmental delays just a few months into a child’s life. However, many children do no receive a diagnosis until presenting more obvious symptoms around the age of two or older.
A study published in 2019 found that it was possible to diagnose autism as early as one year into a child’s life. However, this diagnosis was more likely to be overturned compared to one made around 14 to 18 months of age. The earlier the child is able to access interventions, the more positive outcomes come to pass.
Pay close attention to your child’s behaviors and development, even in infancy. While some signs of autism can be unclear, presenting several signs at once should prompt parents to seek a diagnosis as early as possible. Some early signs may include no interest in playing pretend, delayed speech skills, or quick upset to routine changes.
Most Parents and Caregivers Overlook Autism Until After Age Three
Even though the American Academy of Pediatrics recommends universal screening for autism around age two, how soon a child can be diagnosed with autism varies as many children aren’t diagnosed until they are more than three years old.
The National Institute of Child Health and Human Development states, “Research shows that early detection and early intervention greatly improve outcomes. So it’s important to look for these symptoms when a child is as young as possible.”
Earlier studies have shown that delayed diagnosis can be correlated with a number of common factors. Using the older classification system before the DSM-5 revision, children with “autistic disorder” had an average age of 3.1 years at their time of diagnosis. Later, this increased to 3.9 years for a diagnosis of “developmental disorder not otherwise specified” (PDD-NOS).
In the past, children with Asperger’s disorder received a diagnosis at an average age of 7.2 years. These findings indicate that children with more pervasive symptoms, like struggles with verbal communication, were more likely to receive a diagnosis at a younger age. Often, this was due to parents recognizing their struggles more obviously. On the other hand, some parents may have believed that their child’s “quirks” were a result of their personality.
There are several correlative factors with an older age of diagnosis. They include living in a rural community, being near the poverty level, or having four or more primary care physicians.
How pervasively the ASD presents is the single largest factor in how soon a child can receive an autism diagnosis. A 2013 study found that children with just seven of the 12 main behavior features were diagnosed at an average age of 8.2 years, whereas children with all 12 symptoms were diagnosed at an average age of 3.8 years.
Is An Early Diagnosis More Likely to Be Incorrect?
Studies confirm that professionals can reliably diagnose autism by age two with little risk of invalidation later. Though early diagnoses may require a more definite diagnosis as the child grows older.
A 2006 study found that if children with autism were diagnosed at age two, that diagnosis was very likely to remain consistent by age nine.
However, the study noted that diagnostic stability was less reliable for children whose autism involved less severe presentations. This conclusion means that children with more typical presentations were more likely to have a delayed or missed diagnosis. Additionally, children who did not outwardly display multiple diagnostic criteria were also more likely to have issues around diagnosis.
While medical knowledge has improved in the 14 years since that study was published, it is still possible for a child to delay presentation of ASD until age five or later.
Input from parents is one major factor that can prevent doctors from missing a diagnosis. Parents can often observe some of the subtler signs or pervasive patterns that a single diagnostic test might miss. With that knowledge, clinicians can perform a more thorough diagnosis or re-evaluate as the child ages.
Advances Lower Average Diagnostic Age
The possibility of a child receiving a diagnosis at a young age and having that diagnosis overturned is low. However, the possibility of an overlooked diagnosis is much higher. Parents concerned that their child has been misdiagnosed with ASD can always seek a second opinion. They can even have the child re-evaluated after a few months.
But parents who disregard early symptoms could be limiting their child’s ability to progress, learn, interact with peers, and thrive. The opportunity for early intervention ABA therapy will equip them with the tools and knowledge to thrive alongside their peers.
For this reason, parents are urged to follow the American Academy of Pediatrics’ recommendation and have their child screened around 18 to 24 months. If they do not, they should still closely observe their child’s behaviors. Behaviors in preschool, during play, and when interacting with peers can all show signs of possible ASD.
Early diagnosis and intervention is crucial for helping the child develop skills that can help them lead a fulfilling life. Additionally, it can help parents provide the proper care. BlueSprig uses evidence-based and results-driven ABA therapy to help children with autism thrive. We focus on building skills in communication, self-help, social skills, language and speech skills, behavior management and more.
Get a diagnosis any time you suspect your child might have one or more signs of autism. If they do have ASD, visit an evidence-based autism treatment center that can help you and your child build a better life together.