1.52 THE EMBÚ DAS ARTES, BRAZIL, PRESCHOOL MENTAL HEALTH STUDY: AN EPIDEMIOLOGICAL STUDY OF MENTAL HEALTH AND TRAUMATIC EVENTS: AIMS AND METHODS

Objectives: The Embu das Artes Preschool Mental Health Study is a longitudinal study of the intersection between traumatic events experienced during early childhood and potentially modifiable risk factors for the development of internalizing and externalizing symptoms. Methods: A random sample group of Embu das Artes (in Sao Paulo city metropolitan area, Brazil) public preschools were selected with a probability proportional to the number of children (ages 4-5 years) in each school. The sample group will include 1,250 children from 27 preschools. We assumed an intracluster correlation (ICC) range of 0.01 to 0.1, corresponding to design effects of 1.49 to 5.90. Our sample group will achieve 80 percent power to detect differences in symptoms by gender and neighborhood disadvantage level when assuming ICC values of 0.01, 0.05, and 0.1, respectively, with a 0.05 significance level using two-sided tests. We will assess participants using mental health and sociodemographic screening tools, such as the Ages and Stages Questionnaires: Social-Emotional to examine child social interactions, the Child Behavior Checklist to evaluate internalizing and externalizing symptoms, and the Protective Factors Survey-short form to assess parent-child relationships. Psychologists and psychiatrists from Federal University of Sao Paulo will collect baseline data between May 2016 and December 2017. Results: A November 2015 pilot study determined optimal recruitment strategies, study logistics, and interview measures. During the pilot study, 78 percent of selected caretakers were located and interviewed; 15 percent of children from the pilot sample group presented with delayed socialemotional development that demands further assessments; 48 percent, 65 percent, and 48 percent of the sample group reported significant exposure to neighborhood crime, public incivilities, and social segregation, respectively. Conclusions: In this presentation,wewill report study design methodology and pilot study data. The interview involves components addressing social-environmental factors at the macro-, meso-, and microsystem levels, including individual and neighborhood level social determinants. Primary outcomes include child social-emotional development and parental reports of child behavior.