Adverse Childhood Experiences (ACEs) are stressful or traumatic events that disrupt safe and stable family relationships during the first 18 years of life. An ACE score is a tally of exposures to abuse, neglect, and household challenges. Limiting ACEs is central to healthy development and wellness across the lifespan. Because of their substantial short and long term effects on health and life potential, ACEs represent a prominent public health issue with large economic and social costs.
The ACE categories
The ACE framework groups childhood adversity into three domains. The score is a count of "yes" responses across the categories.
1. Abuse
Emotional abuse: frequent swearing, insults, humiliation, or threats causing fear of physical harm.
Physical abuse: being pushed, grabbed, slapped, or hit to the point of injury.
Sexual abuse: sexual touching, fondling, or intercourse by someone at least five years older, or attempts thereof.
2. Neglect
Emotional neglect: feelings ignored; lack of closeness, support, or family members looking out for one another.
Physical neglect: insufficient food, dirty clothes, lack of needed medical care, or caregiver too impaired to provide care.
3. Household challenges
Domestic violence: household member subjected to hitting, kicking, threats, or weapon use.
Substance use: alcohol misuse or use of street drugs by a household member.
Mental illness: household member with depression, other mental illness, or suicide attempt.
Parental separation or divorce: loss of a biological parent due to separation, divorce, or abandonment.
Incarceration: household member sent to prison.
Prevalence and population insights
A majority of Americans have at least one ACE.
About two in three children experience at least one traumatic event before age 16.
Girls are more likely than boys to experience certain traumatic events; disparities are pronounced in some racial and ethnic groups.
Socioeconomically disadvantaged populations tend to have higher ACE exposure and worse outcomes.
Health outcomes and impact
ACEs can undermine safety and stability, leading to toxic stress that disrupts neurodevelopment and harms nervous, endocrine, and immune systems.
Mental health: lifetime depression, anxiety, PTSD; a large share of suicide attempts is attributable to ACE related trauma.
Behavioral impact: social, emotional, and cognitive impairment; higher risk behaviors such as smoking, substance use, and unsafe sexual practices.
Life opportunities: reduced educational attainment, employment, and income.
ACE score: interpretation
The ACE score is a count from 0 to 10; it is a risk marker, not a diagnosis.
ACE Score
Interpretation and risk level
0
Lowest risk; reference for health outcomes.
1 to 3
Increased risk; graded dose response with each additional ACE.
4 or higher
Significantly elevated risk for multiple behavioral and physical conditions.
6 or higher
Highest risk; associated with profound health impact and reduced life expectancy.
Clinical application and approach
Screen and assess: include ACEs in routine risk assessments to connect children and families with services.
Trauma informed approach: acknowledge the impact of trauma, recognize symptoms, respond appropriately, and prevent re traumatization.
Intervene and refer: address immediate threats and provide referrals to appropriate supports.
Personalize treatment: tailor care plans; the goal is to equip individuals with tools to lead healthy, fulfilling lives.
Clinical summary
Screen for ACEs regularly to identify early adversities.
Use the score for risk assessment and context; it is not diagnostic.
Adopt trauma informed care to foster safety, trust, and healing.
Address immediate risks and connect to support services.
Recognize strong links between ACEs and long term mental, behavioral, and social outcomes.
Version and sources
Version: v1.1 — ACEs overview, categories, prevalence, and clinical approach.
Disclaimer: This information is intended for qualified healthcare professionals. The ACEs framework is a tool for risk assessment and contextual understanding. Use it sensitively as part of a comprehensive clinical evaluation. The purpose of screening is to guide trauma informed care and foster healing, not to label or stigmatize individuals.