About Adverse Childhood Experiences

What are adverse childhood experiences?

Adverse childhood experiences, or ACEs, are potentially traumatic events that occur in childhood (0-17 years). Examples include:1

• Experiencing violence, abuse, or neglect.
• Witnessing violence in the home or community.
• Having a family member attempt or die by suicide.

Also included are aspects of the child’s environment that can undermine their sense of safety, stability, and bonding. Examples can include growing up in a household with:1

• Substance use problems.
• Mental health problems.
• Instability due to parental separation.
• Instability due to household members being in jail or prison.

The examples above are not a complete list of adverse experiences. Many other traumatic experiences could impact health and well-being. This can include not having enough food to eat, experiencing homelessness or unstable housing, or experiencing discrimination.23456

Quick facts and stats

ACEs are common. About 64% of adults in the United States reported they had experienced at least one type of ACE before age 18. Nearly one in six (17.3%) adults reported they had experienced four or more types of ACEs.7

Three in four high school students reported experiencing one or more ACEs, and one in five experienced four or more ACEs. ACEs that were most common among high school students were emotional abuse, physical abuse, and living in a household affected by poor mental health or substance abuse.8

Preventing ACEs could potentially reduce many health conditions. Estimates show up to 1.9 million heart disease cases and 21 million depression cases potentially could have been avoided by preventing ACEs.1 Preventing ACEs could reduce suicide attempts among high school students by as much as 89%, prescription pain medication misuse by as much as 84%, and persistent feelings of sadness or hopelessness by as much as 66%.8

Some people are at greater risk of experiencing one or more ACEs than others. While all children are at risk of ACEs, numerous studies show inequities in such experiences. These inequalities are linked to the historical, social, and economic environments in which some families live. 56ACEs were highest among females, non-Hispanic American Indian or Alaska Native adults, and adults who are unemployed or unable to work.7

ACEs are costly. ACEs-related health consequences cost an estimated economic burden of $748 billion annually in Bermuda, Canada, and the United States.9

Outcomes

ACEs can have lasting effects on health and well-being in childhood and life opportunities well into adulthood.10 Life opportunities include things like education and job potential. These experiences can increase the risks of injury, sexually transmitted infections, and involvement in sex trafficking. They can also increase risks for maternal and child health problems including teen pregnancy, pregnancy complications, and fetal death. Also included are a range of chronic diseases and leading causes of death, such as cancer, diabetes, heart disease, and suicide.11112131415161718

ACEs and associated social determinants of health, such as living in under-resourced or racially segregated neighborhoods, can cause toxic stress. Toxic stress, or extended or prolonged stress, from ACEs can negatively affect children’s brain development, immune system, and stress-response systems. These changes can affect children’s attention, decision-making, and learning.19

Children growing up with toxic stress may have difficulty forming healthy and stable relationships. They may also have unstable work histories as adults and struggle with finances, job stability, and depression throughout life. 19These effects can also be passed on to their own children.202122 Some children may face further exposure to toxic stress from historical and ongoing traumas. These historical and ongoing traumas include experiences of racial discrimination or the impacts of poverty resulting from limited educational and economic opportunities.16

Prevention

Adverse childhood experiences can be prevented. Certain factors may increase or decrease the risk of experiencing adverse childhood experiences.

Preventing adverse childhood experiences requires understanding and addressing the factors that put people at risk for or protect them from violence.

Creating safe, stable, nurturing relationships and environments for all children prevent ACEs and help all children reach their full potential. These relationships and environments are essential to creating positive childhood experiences. We all have a role to play.

What CDC is doing

CDC is committed to building systems and communities that nurture development, and to ensuring that every child has the opportunity to thrive. By investing in the potential of all children and supporting their families and their communities, we can prevent ACEs before they happen, and buffer the risk of harm when they do happen.

CDC is dedicated to preventing, identifying, and responding to ACEs at the community, state, and national level so that all people can achieve lifelong health and wellbeing. Our goal is to create the conditions for strong, thriving families and communities where children and youth are free from harm.

CDC's four strategic goals for ACEs prevention and response include:

1. Support ACEs surveillance and data innovation.
2. Expand what we know about evidence-based ACEs prevention and positive childhood experiences promotion.
3. Build local, state, tribal, and key partner capacity.
4. Increase awareness and understanding among key partners.

CDC's ACEs Prevention Strategy expands upon these goals and outlines specific objectives for ACEs prevention and response.