adverse childhood experiences study (ace study)

The CDC-Kaiser ACE Study was a landmark investigation that identified a link between Adverse Childhood Experiences (ACEs)—such as abuse, neglect, or household challenges—and long-term negative outcomes in health and well-being.

The study found that a higher "ACE score," representing more ACEs experienced in childhood, is strongly associated with a greater risk of adult health problems, including heart disease, depression, substance abuse, and chronic illnesses, along with increased social and economic challenges.

What are ACEs?
ACEs are stressful or traumatic events that occur during childhood and can disrupt a child's sense of safety, stability, and bonding. The initial study identified 10 ACEs across three categories:

Abuse:
Physical abuse, sexual abuse, and emotional abuse.

Neglect:
Physical neglect and emotional neglect.

Household Challenges:
Witnessing violence against a mother, having a household member with a mental illness or substance abuse issue, having a household member who is incarcerated, and parental separation or divorce.

Key Findings of the ACE Study

Prevalence:
ACEs are common; nearly two-thirds of people in the original study reported at least one ACE.

Dose-Response Relationship:
The more ACEs a person experienced, the higher their ACE score and the greater their risk for adverse health outcomes.

Impact on Health:
A higher ACE score is associated with increased risk for chronic diseases like heart disease, cancer, and diabetes, as well as mental health conditions and risky behaviors like smoking and substance abuse.

Public Health Implications:
The study established a powerful connection between ACEs and major public health problems, driving a broader response to prevent childhood adversity and address its long-term consequences.

Beyond the Original 10 ACEs
Research since the original study has expanded the definition of ACEs to include other forms of adversity, such as discrimination, poverty, and racism, recognizing that these experiences also have a significant impact on development and health.

Positive Childhood Experiences (PCEs)
In contrast to ACEs, research has also highlighted the role of Positive Childhood Experiences (PCEs)—such as nurturing relationships, safe environments, and opportunities for connection—which can mitigate the effects of ACEs and support healthy development.

Relates to Adverse Childhood Experiences (ACEs)