Researchers in a recent study have found a link between childhood violence and psychiatric disorders such as depression and anxiety, and attention deficit hyperactivity.

Exposure to childhood violence is linked to psychiatric disorders, according to a research. The results of the study conducted by researchers at Columbia University's Mailman School of Public Health and Federal University of São Paulo showed that having experienced any traumatic event and low socioeconomic status were associated with an internalizing disorder such as depression and anxiety and an externalizing disorder including attention-deficit hyperactivity.

The study was conducted in two different neighborhoods in the city of São Paulo, Brazil, one urban and one more rural. One-hundred and eighty 12-year-olds from public schools and their caregivers were interviewed to determine the influence of previous violent events and of socioeconomic status on the prevalence of psychiatric disorders.

Using structured interviews, the research team led by Silvia Martins, MD, PhD, Mailman School associate professor of Epidemiology, evaluated psychiatric disorders including: internalizing disorders (depression, anxiety and post-traumatic stress disorder) and externalizing disorders (attention-deficit hyperactivity disorder, conduct disorder and oppositional-defiant disorder). Nearly one-quarter (22 percent) of the youths had a psychiatric disorder. Depression and attention-deficit hyperactivity disorder were the most common diagnoses, at 9.5 percent, and 9 percent, respectively, followed by anxiety disorder at 6 percent.

A total of 14 percent of the sample had an internalizing disorder, nearly half of whom were males (45 percent). Another 15.5 percent had an externalizing disorder. Almost 60 percent of the adolescents with any diagnosis had experienced at least one violent event during their lifetime. The results are published in the Brazilian Journal of Psychiatry.