%0 Generic %A S.M., Karam %A A.J.D., Barros %A A., Matijasevich %A I.S., dos Santos %A L., Anselmi %A F., Barros %A S., Leistner-Segal %A T.M., Félix %A M., Riegel %A S.W., Maluf %A R., Giugliani %A M.M., Black %D 2016 %T Supplementary Material for: Intellectual Disability in a Birth Cohort: Prevalence, Etiology, and Determinants at the Age of 4 Years %U https://karger.figshare.com/articles/dataset/Supplementary_Material_for_Intellectual_Disability_in_a_Birth_Cohort_Prevalence_Etiology_and_Determinants_at_the_Age_of_4_Years/3808140 %R 10.6084/m9.figshare.3808140.v1 %2 https://karger.figshare.com/ndownloader/files/5930895 %K Cohort studies %K Developmental delay %K Intellectual disability %K Mental retardation %K Prevalence %X Background: Intellectual disability (ID), characterized by impairments in intellectual function and adaptive behavior, affects 1-3% of the population. Many studies investigated its etiology, but few are cohort studies in middle-income countries.Aims: To estimate prevalence, etiology, and factors related to ID among children prospectively followed since birth in a Southern Brazilian city (Pelotas). Methods: In 2004, maternity hospitals were visited daily and births were identified. Live-born infants (n = 4,231) whose family lived in the urban area have been followed for several years. At the age of 2 and 4 years, performances in development and intelligence tests were evaluated using the Battelle Developmental Inventory and Wechsler Intelligence Scale, respectively. Children considered as having developmental delay were invited to attend a genetic evaluation. Results: At 4 years of age, the prevalence of ID was 4.5%, and the etiology was classified into 5 groups: environmental (44.4%), genetic (20.5%), idiopathic (12.6%), neonatal sequelae (13.2%), other diseases (9.3%). Most children presented impairment in two or more areas of adaptive behavior. There was no difference in prenatal care attendance or maternal schooling among the groups. Conclusion: For about 40% of children, ID was attributed to nonbiological factors, suggesting that the rate may be reduced with appropriate interventions early in life. %I Karger Publishers