The Child and Adolescent Twin Study in Sweden (CATSS)
Project leader: Paul Lichtenstein
The aim of this study is to investigate how both genetic and environmental effects influence health and behavior in children and adolescents. In this study parents to all Swedish twins turning 9 or 12 years are asked to complete a telephone interview concerning the health and behavior of their twins. The interview screens for several different health (e.g., asthma, allergies, diabetes) and behavior (e.g., attention, social interaction) problems. Some of the families will be followed up with additional questionnaires, as well as with genotyping and clinical interviews.
The response frequency of the telephone interview is 80%. By November 2008, 7408 interviews had taken place.
Christopher Gillberg, Göteborgs Universitet
Henrik Anckarsäter, Lunds Universitet