Childhood trauma exposure — the ACE

What the ACE measures and why CDC, Kaiser Permanente, and SAMHSA cite it

ACE is a 10-item retrospective questionnaire developed by Drs. Vincent J. Felitti (Kaiser Permanente Department of Preventive Medicine) and Robert F. Anda (Centers for Disease Control and Prevention) and published in 1998 in the American Journal of Preventive Medicine. The original cohort included 17,337 Kaiser Permanente HMO members surveyed between 1995 and 1997. Felitti and Anda counted exposure across ten categories of childhood adversity (abuse, neglect, household dysfunction) and correlated the count with adult health outcomes. Their finding — a strong dose-response relationship between ACE score and many leading causes of adult death — reshaped public health thinking about the long arc of childhood experience.

ACE lives inside the CDC Adverse Childhood Experiences program and the SAMHSA TIP 57 Trauma-Informed Care guidance. The CDC tracks ACE prevalence through its Behavioral Risk Factor Surveillance System (BRFSS) survey across all 50 states. ACEs Aware (a California state initiative) maintains clinician-facing screening protocols. The original Felitti instrument is public-domain since 1998 — no copyright restriction.

The 10 items are grouped into two categories. Abuse and neglect (Q1–5): verbal abuse with fear of physical harm, physical abuse, sexual abuse, emotional neglect, physical neglect. Household dysfunction (Q6–10): parental separation or divorce, mother treated violently, household substance abuse, household mental illness or suicide attempt, incarcerated household member. Each yes scores 1 point; total is 0 to 10.

Critical context: ACE measures exposure, not damage. A high score reflects what was put on a child, not who the adult became. Felitti's own subsequent research and decades of trauma science emphasize three protective factors: at least one stable, supportive adult relationship in childhood; evidence-based trauma-informed therapy in adulthood; and connection (family, community, peer support, faith, recovery community). With those three, dose-response risk patterns flatten substantially. ACE is information for compassionate planning — not a verdict.

Limitations of the original 10-item instrument: Felitti's questions cover abuse, neglect, and household dysfunction inside the family. They do not cover community violence, racism and discrimination, peer bullying, natural disasters, immigration trauma, foster-care placement, food insecurity, or housing instability. A score of 0 on the original ACE does not mean a trauma-free childhood. Newer expanded measures (the Philadelphia ACE survey, the World Health Organization's ACE-IQ) address some of these gaps; the original 10-item version remains the most-cited and most-validated.

What the 4 score bands mean

ACE band interpretation comes from Felitti's 1998 publication and subsequent CDC analyses (Hughes et al. 2017 Lancet meta-analysis, n=253,719). Bands are descriptive of population risk profiles, not individual destiny. Each band below explains the score range, what it reflects clinically, what guidance the trauma-informed care literature attaches to it, and the substance-use connection most relevant for users on a treatment directory.

Why ACE matters for substance use disorder treatment

Childhood adversity is among the strongest predictors of adult substance use disorder. Felitti's 1998 study found that compared to ACE 0, an ACE score of 4 or more was associated with a 7.4× increase in alcohol use disorder risk, a 10× increase in injection drug use risk for ACE 4–5, and 12.2× for ACE ≥6. The relationship is dose-response: each additional ACE adds risk in a roughly linear pattern up through severe exposure.

Among adults in substance-use treatment, the prevalence of ACE exposure is dramatically elevated: 78–87% report at least one ACE and 40–50% report 4 or more — compared to roughly 14% in the general adult population (Stein et al. 2017). Untreated childhood trauma is one of the strongest predictors of post-treatment relapse.

Why this changes treatment

For decades, addiction treatment and trauma treatment ran in parallel programs that rarely talked to each other. The evidence is now clear: integrated dual-diagnosis treatment — addressing substance use and trauma in the same program, by clinicians trained in both — outperforms sequential or separate treatment for outcomes including relapse, depression severity, and program completion.

SAMHSA Treatment Improvement Protocol 57 (TIP 57): Trauma-Informed Care in Behavioral Health Services is the standard reference. When evaluating treatment programs for yourself or a family member, ask explicitly:

• Do clinicians have specific training in evidence-based trauma therapies? CBT-trauma, EMDR, Prolonged Exposure, IFS, or specialized complex-PTSD models.
• Does the program screen for ACE / trauma history at intake? If yes, a trauma-informed framework is in place. If not, ask why.
• Is medication management coordinated? Some psychiatric medications (SSRIs, prazosin) help trauma symptoms; addiction medications (naltrexone, buprenorphine) help SUD; coordination matters.
• Does the program offer specific aftercare for trauma processing? Standard 12-step aftercare without trauma support is incomplete for high-ACE clients.

When calling a treatment center, «Do you offer trauma-informed care?» is a yes-or-no question. The follow-up — "What does that mean specifically in your program?" — reveals whether the answer is meaningful or marketing copy.

From an ACE score to a real next step: trauma-informed therapy, integrated dual-diagnosis, and resilience

If your ACE score is 4 or higher, the CDC's clinical-action threshold has been reached — trauma-informed care is the standard recommendation. A score alone is not a treatment plan but a structured starting point. Here is how the evidence translates to concrete actions.

Find a trauma-informed therapist

• Evidence-based modalities to ask about: CBT for trauma (cognitive-behavioral therapy adapted for trauma), EMDR (Eye Movement Desensitization and Reprocessing — strong evidence for single-incident and complex trauma), Prolonged Exposure (PE), narrative therapy, Internal Family Systems (IFS). Specific complex-PTSD models include Trauma-Focused CBT (TF-CBT) and Skills Training in Affective and Interpersonal Regulation (STAIR).
• Therapist directories: Psychology Today and Therapy Den let you filter by trauma specialty. Anxiety & Depression Association of America directory lists CBT-trained therapists. For EMDR specifically: EMDR International Association directory.
• Insurance-and-cost note: trauma therapy is a 20+ session commitment. Verify in-network coverage before starting, or look for sliding-scale community mental-health centers funded by SAMHSA block grants.

If you have substance-use concerns alongside ACE

• Take an SUD screen too. AUDIT-10 (alcohol), DAST-10 (drugs), or CAGE (quick alcohol triage). High ACE + positive SUD screen is the dual-diagnosis profile.
• Call SAMHSA 1-800-662-4357 — the helpline counsellors can route you to integrated dual-diagnosis programs in your area. Free, confidential, English and Spanish.
• Ask treatment programs directly: "Do you screen for ACE / trauma history at intake?" — "Do you offer EMDR or CBT-trauma in-program?" — "How do you coordinate trauma therapy with medication-assisted treatment?" If answers are vague, look elsewhere.

If your score is high and you are not ready for therapy

That is a valid place to be. Treatment is hard work and timing matters. In the meantime:

• One stable adult relationship is the strongest single childhood protective factor against adult ACE outcomes. In adulthood, the analogue is at least one stable supportive adult relationship — partner, therapist, sponsor, faith leader, peer-support specialist.
• Recovery and survivor communities: 12-step (AA, NA), SMART Recovery, Adult Children of Alcoholics (ACA), Survivors of Incest Anonymous, and faith-community trauma groups all reduce isolation and are free.
• Self-education matters: Bessel van der Kolk's The Body Keeps the Score, Gabor Maté's writing on addiction and trauma, the original ACE study materials at CDC. Knowledge does not replace therapy but reduces shame and clarifies what is happening.
• Crisis resources stay free and immediate: 988 Lifeline (call or text), 741741 Crisis Text Line, RAINN 1-800-656-HOPE for sexual-abuse-specific support.

If ACE is not the right fit: PCL-5, PHQ-9, GAD-7, AUDIT-10, and DAST-10

ACE measures past exposure (count of ten categories of childhood adversity). It does not measure current symptoms or current substance use. The screeners below cover those distinct questions. If you want current PTSD symptom severity, take PCL-5 (coming soon). For current depression, anxiety, alcohol, or drug use, the live screeners below are validated and used in primary care.

ACE terms: dose-response, EMDR, IFS, TIP 57, complex PTSD, integrated treatment

Six terms appear repeatedly across this page — the original 10-item instrument (ACE), the statistical pattern Felitti documented (dose-response), two of the strongest evidence-based therapies for trauma (EMDR and IFS), the SAMHSA standard for trauma-informed care (TIP 57), the diagnostic frame for trauma exposure plus chronic relational injury (complex PTSD), and the evidence-based approach to trauma-plus-SUD (integrated dual-diagnosis treatment). Plain definitions follow.

ACE · Adverse Childhood Experiences

Original 10-item retrospective questionnaire by Felitti, Anda et al. published in 1998 in the American Journal of Preventive Medicine. Counts exposure to abuse, neglect, and household dysfunction during the first 18 years of life. Public-domain. Measures exposure, not damage. CDC tracks ACE prevalence through the BRFSS survey.

Dose-response relationship

The statistical pattern Felitti documented in 1998 and that has been replicated in dozens of follow-up studies: each additional ACE roughly multiplies adult risk for substance use disorder, depression, suicide attempt, and several chronic diseases. The pattern is approximately linear up through severe exposure (ACE ≥7). Dose-response is what distinguishes ACE from a binary exposure variable — it explains why the score (not just the presence of any ACE) matters.

EMDR · Eye Movement Desensitization and Reprocessing

Evidence-based trauma therapy developed by Dr. Francine Shapiro in 1987. Combines exposure to traumatic memories with bilateral stimulation (eye movements, taps, or sounds) to facilitate memory reconsolidation. Strong evidence for both single-incident PTSD and complex-trauma populations. Typically 8–12 sessions for single-incident, longer for complex trauma. Find an EMDRIA-certified clinician at emdria.org.

IFS · Internal Family Systems

Therapy model developed by Dr. Richard Schwartz that treats the psyche as a system of "parts" (protective, wounded, leadership) with a core Self capable of compassionate observation. Evidence-based for trauma, complex PTSD, and dissociation. Often combined with EMDR or as primary treatment. Less directive than CBT, fits well with clients who have had bad experiences with confrontational therapies.

SAMHSA TIP 57 · Trauma-Informed Care in Behavioral Health Services

SAMHSA Treatment Improvement Protocol 57 — the federal government's primary guidance document on integrating trauma-informed practice into substance-use and mental-health treatment programs. TIP 57 establishes that trauma exposure is highly prevalent in SUD populations and that integrated treatment (trauma + SUD simultaneously) outperforms sequential or separate treatment for outcomes including relapse and program completion.

Integrated dual-diagnosis treatment

Best-evidence approach for trauma plus co-occurring substance use disorder — addressing both diagnoses simultaneously in a single program by clinicians trained in both, rather than referring trauma treatment out or sequencing programs. NIDA and SAMHSA recommend integrated dual-diagnosis programs for high-ACE / high-SUD clients. Outcomes vs sequential treatment: lower relapse, lower trauma symptom severity, lower drop-out.

ACE FAQ: anonymity, what scores mean, resilience, SUD connection, PCL-5 difference

Ten common questions about ACE — whether the quiz is anonymous, how to interpret a high score (without panic), what the substance-use connection actually says, what evidence-based treatments work, how ACE differs from PCL-5 (current PTSD symptoms), and the known limitations of the original 10-item instrument.

ACE primary sources: Felitti 1998 AJPM, CDC, SAMHSA TIP 57, Kaiser Permanente, ACEs Aware

Every fact and threshold on this page traces to one of the 11 sources below: Felitti's original 1998 AJPM publication of the ACE Study, the CDC ACE program (which tracks prevalence through BRFSS), SAMHSA's TIP 57 trauma-informed-care guidance, the ACEs Aware California state initiative, the SAMHSA helpline, NIDA's research on comorbidity, and crisis resources (988, Crisis Text Line, RAINN).

• Felitti VJ, Anda RF, Nordenberg D, et al. Relationship of childhood abuse and household dysfunction to many of the leading causes of death in adults: The Adverse Childhood Experiences (ACE) Study. Am J Prev Med. 1998;14(4):245-258.
• CDC — Adverse Childhood Experiences program.
• CDC — ACE prevention guidance.
• ACEs Aware — California state initiative for clinician-facing screening protocols.
• SAMHSA TIP 57 — Trauma-Informed Care in Behavioral Health Services.
• 988 Suicide & Crisis Lifeline.
• Crisis Text Line (text HOME to 741741).
• RAINN — sexual-violence support, 1-800-656-HOPE.
• SAMHSA National Helpline (1-800-662-4357).
• NIDA — Comorbidity: Substance Use Disorders and Other Mental Illnesses.
• Harvard Center on the Developing Child — resilience research.