The short answer is that most children with autism grow up to have a normal life expectancy. However, research does show that on average, people with autism die 16 to 20 years younger than the general population. This gap is not caused by autism itself but by specific, preventable health conditions and safety risks that are more common in the autistic community. Understanding these risks is the first step to changing this statistic for future generations.
How Long Do Kids With Autism Live Compared to Other Kids?
Children diagnosed with autism today have a very good chance of living a full lifespan. The average life expectancy for the general population in the United States is about 79 years. Studies have found that the average life expectancy for people with autism spectrum disorder (ASD) is between 54 and 58 years.
That sounds alarming. But it is important to understand why. The data comes from studies that included older adults who were diagnosed later in life. Many of them had intellectual disabilities and lived in an era with far fewer support services. Their shorter lives were not caused by autism. They were caused by conditions that could have been treated.
A large 2022 study published in the journal Autism Research looked at over 36,000 people with autism in the United Kingdom. It found that people with autism who also had an intellectual disability died about 30 years earlier. Those without an intellectual disability died about 12 years earlier. The biggest difference came from chronic health conditions that were not being managed properly.
What Conditions Actually Shorten Lifespan in Autism?
The leading causes of death in the autistic population are not mysterious. They are the same conditions that affect everyone, but they happen more often and are caught later.
Research from the American Journal of Public Health found that the top causes of death for people with autism are heart disease, suicide, and epilepsy. Respiratory infections like pneumonia are also significantly more common. These are all treatable conditions.
The gap between autism and the general population is not about autism itself. It is about how the healthcare system interacts with autistic people. Autistic adults are less likely to receive preventive care. They are more likely to have trouble communicating symptoms to a doctor. This leads to diagnoses that come too late.
Seizure disorders are a major factor. About 20 to 30 percent of people with autism also have epilepsy. This is much higher than the general population. Uncontrolled seizures can be fatal, and the risk increases with age.
Does Autism Severity Affect Life Expectancy?
Yes, severity plays a major role. But “severity” in this context usually means the presence of an intellectual disability or the ability to communicate needs.
The CDC reports that about 31 percent of children with autism also have an intellectual disability. This group faces the highest risk for early mortality. They often depend on caregivers for basic needs. If a caregiver misses a health problem, it can become serious very quickly.
Children who are nonverbal or have limited communication skills cannot tell someone they have chest pain or that a headache is getting worse. Parents and doctors must rely on behavioral changes. A sudden increase in aggression or self-stimulatory behavior can be a sign of a medical emergency. Many caregivers are not trained to make this connection.
For autistic children without intellectual disability, the risks are different. They face higher rates of anxiety, depression, and suicide. A 2017 study in the journal JAMA Pediatrics found that autistic children without intellectual disability were nearly twice as likely to attempt suicide compared to their peers.
What Are the Biggest Safety Risks for Autistic Children?
Wandering is one of the most immediate dangers for young children with autism. The National Autism Association reports that roughly half of all children with autism will wander or elope from a safe environment at some point. Drowning is the leading cause of death for autistic children who wander. These deaths are almost entirely preventable.
The table below summarizes the main risk factors and how they differ by age and ability level.
| Risk Factor | Young Children | Teens and Adults |
|---|---|---|
| Wandering / Elopement | Very high risk. Leading cause of accidental death. | Risk decreases but still present in those with intellectual disability. |
| Drowning | Leading cause of death from wandering. | Still a risk if wandering persists. |
| Seizures / Epilepsy | Moderate risk. Often develops in childhood. | High risk. Can become more severe or lead to SUDEP. |
| Suicide | Rare in young children. | High risk in teens and adults without intellectual disability. |
| Chronic Disease | Low risk in childhood. | High risk due to poor healthcare access and lifestyle factors. |
What Can Parents Actually Do to Improve Longevity?
The research points to three concrete actions that make a measurable difference.
First, treat co-occurring medical conditions aggressively. Do not assume that every behavior is autism. If your child has a sudden change in sleep, mood, or behavior, rule out a physical cause first. Many autistic children have gastrointestinal problems, reflux, or dental pain that goes undiagnosed. These conditions can lead to serious complications over time.
Second, teach water safety early. Formal swimming lessons reduce the risk of drowning by 88 percent for children ages 1 to 4. This is a life-saving skill for any child, but it is especially critical for autistic children who may be drawn to water. Install door alarms and window locks. Use tracking devices if your child is a wanderer. The National Autism Association offers a free wandering prevention toolkit.
Third, build a healthcare team that understands autism. A typical pediatrician may not know how to adapt an exam for a non-speaking child. Seek out providers who specialize in autism or developmental disabilities. The American Academy of Pediatrics recommends that all children with autism receive a comprehensive health check at least once a year. This should include screening for seizures, heart health, and mental health.
Common Misconceptions About Autism and Lifespan
There is a persistent myth that autism itself causes early death. That is not what the evidence shows. A 2024 review in Neuroscience & Biobehavioral Reviews confirmed that when co-occurring conditions are properly managed, life expectancy normalizes. The shortened lifespan is not inevitable. It is the result of preventable factors.
Another common belief is that autistic children are fragile or sickly. Most autistic children are physically healthy. They have the same immune systems and organs as any other child. The problem is not their biology. It is that their health needs are overlooked or misinterpreted.
Some people also believe that early intervention therapies will fix everything. Early intervention is valuable for communication and social skills. It does not directly prevent the health conditions that shorten lifespan. You still need to monitor for seizures, heart health, and mental health as the child grows.
Frequently Asked Questions
Frequently Asked Questions
Can a child with autism live a normal lifespan?
Yes, many children with autism grow up to live a normal lifespan. The key is managing co-occurring health conditions and ensuring proper medical care throughout life.
What is the most common cause of death in autistic children?
For young children, drowning from wandering is the most common cause of accidental death. For older children and adults, heart disease and suicide are the leading causes.
Does having autism lower life expectancy?
On average, people with autism die 16 to 20 years earlier than the general population. But this is due to preventable health conditions and safety risks, not autism itself.
How can I help my autistic child live longer?
Focus on water safety, regular medical checkups, managing seizures or other health conditions, and building a healthcare team that understands autism.
