Adverse Childhood Experiences Study

The Adverse Childhood Experiences Study (ACE Study) is a research study conducted by the American health maintenance organization Kaiser Permanente and the Centers for Disease Control and Prevention. Participants were recruited to the study between 1995 and 1997 and have been in long-term follow up for health outcomes. The study has demonstrated an association of adverse childhood experiences (ACEs) (aka childhood trauma) with health and social problems across the lifespan. The study has produced many scientific articles and conference and workshop presentations that examine ACEs.These mediators of the stress response promote adaptation in the aftermath of acute stress, but they also contribute to allostatic overload, the wear and tear on the body and brain that result from being 'stressed out.' This conceptual framework has created a need to know how to improve the efficiency of the adaptive response to stressors while minimizing overactivity of the same systems, since such overactivity results in many of the common diseases of modern life. This framework has also helped to demystify the biology of stress by emphasizing the protective as well as the damaging effects of the body's attempts to cope with the challenges known as stressors. The Adverse Childhood Experiences Study (ACE Study) is a research study conducted by the American health maintenance organization Kaiser Permanente and the Centers for Disease Control and Prevention. Participants were recruited to the study between 1995 and 1997 and have been in long-term follow up for health outcomes. The study has demonstrated an association of adverse childhood experiences (ACEs) (aka childhood trauma) with health and social problems across the lifespan. The study has produced many scientific articles and conference and workshop presentations that examine ACEs. In the 1980s, the dropout rate of participants at Kaiser Permanente's obesity clinic in San Diego, California, was about 50%; despite all of the dropouts successfully losing weight under the program. Vincent Felitti, head of Kaiser Permanente’s Department of Preventive Medicine in San Diego, conducted interviews with people who had left the program, and discovered that a majority of 286 people he interviewed had experienced childhood sexual abuse. The interview findings suggested to Felitti that weight gain might be a coping mechanism for depression, anxiety, and fear. Felitti and Robert Anda from the Centers for Disease Control and Prevention (CDC) went on to survey childhood trauma experiences of over 17,000 Kaiser Permanente patient volunteers. The 17,337 participants were volunteers from approximately 26,000 consecutive Kaiser Permanente members. About half were female; 74.8% were white; the average age was 57; 75.2% had attended college; all had jobs and good health care, because they were members of the Kaiser health maintenance organization. Participants were asked about different types of childhood trauma that had been identified in earlier research literature: According to the United States' Substance Abuse and Mental Health Services Administration, the ACE study found that: About two-thirds of individuals reported at least one adverse childhood experience; 87% of individuals who reported one ACE reported at least one additional ACE. The number of ACEs was strongly associated with adulthood high-risk health behaviors such as smoking, alcohol and drug abuse, promiscuity, and severe obesity, and correlated with ill-health including depression, heart disease, cancer, chronic lung disease and shortened lifespan. Compared to an ACE score of zero, having four adverse childhood experiences was associated with a seven-fold (700%) increase in alcoholism, a doubling of risk of being diagnosed with cancer, and a four-fold increase in emphysema; an ACE score above six was associated with a 30-fold (3000%) increase in attempted suicide. The ACE study's results suggest that maltreatment and household dysfunction in childhood contribute to health problems decades later. These include chronic diseases—such as heart disease, cancer, stroke, and diabetes—that are the most common causes of death and disability in the United States. The study's findings, while relating to a specific population within the United States, might reasonably be assumed to reflect similar trends in other parts of the world, according to the World Health Organization. The study was initially published in the American Journal of Preventive Medicine. The ACE Study has produced more than 50 articles that look at the prevalence and consequences of ACEs. It has been influential in several areas. Subsequent studies have confirmed the high frequency of adverse childhood experiences, or found even higher incidences in urban or youth populations. The original study questions have been used to develop a 10-item screening questionnaire. Numerous subsequent surveys have confirmed that adverse childhood experiences are frequent. The CDC runs the Behavioral Risk Factor Surveillance System (BRFSS), an annual survey conducted by individual state health departments in all 50 states. An expanded survey instrument in several states found each state to be similar. Some states have collected additional local data. Adverse childhood experiences were even more frequent in studies in urban Philadelphia and in a survey of young mothers (mostly younger than 19).Internationally, an Adverse Childhood Experiences International Questionnaire (ACE-IQ) is undergoing validation testing. Surveys of adverse childhood experiences have been conducted in Romania, the Czech Republic, the Republic of Macedonia, Norway, the Philippines, the United Kingdom, Canada, China and Jordan. Child Trends used data from the 2011/12 National Survey of Children's Health (NSCH) to analyze ACEs prevalence in children nationally, and by state. The NSCH's list of 'adverse family experiences' includes a measure of economic hardship and shows that this is the most common ACE reported nationally.