Twin Research and Human Genetics

Articles

The Swedish Twin study of CHild and Adolescent Development: The TCHAD-Study

Paul Lichtensteina1 c1, Catherine Tuvblada2, Henrik Larssona3 and Eva Carlströma4

a1 Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Sweden. Paul.Lichtenstein@ki.se

a2 Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Sweden.

a3 Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Sweden.

a4 Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Sweden.

Abstract

The Swedish Twin study of CHild and Adolescent Development (TCHAD) is a longitudinal study of how genes and environments contribute to development of health and behavioral problems from childhood to adulthood. The study includes 1480 twin pairs followed since 1994, when the twins were 8 to 9 years old. The last data collection was in 2005 when the twins were 19 to 20 years old. Both parents and twins have provided data. In this article we describe the sample, data collections, and measures used. In addition, we provide some key findings from the study, focusing on antisocial behavior, criminality, and psychopathic personality.

(Received January 19 2006)

(Accepted October 13 2006)

Correspondence:

c1 Address for correspondence: Paul Lichtenstein, Department of Medical Epidemiology and Biostatistics, Box 281, SE-171 77 Stockholm, Sweden.

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