[A twin study of genetic and environmental influences on relationship between attention deficit and anxiety/depression in children and adolescents].

Objective: To understand the genetic and environmental influences on the relationship between attention deficit and anxiety/depression in children and adolescents. Methods: A total of 1 062 same-sex twins aged 6-18 years were included in this study. A parent-rated child behavior checklist (CBCL) was used in the assessment. Software Mx was used to fit the univariate model of structural equation. The relationship between attention deficit and anxiety/depression was analyzed through bivariate genetic modeling. Results: The genetic factor had influence on the relationship between attention deficit and anxiety/depression (r(g)=0.48). Shared and non-shared environmental correlation scores of attention deficit and anxiety/depression were 0.86 and 0.14 respectively. Conclusion: Common genetic and shared environmental influences can explain the relationship between attention deficit and anxiety/depression in children and adolescents.