Prevalence and genetic and environmental influences on anxiety disorders in 6-year-old twins

@article{Bolton2005PrevalenceAG,
  title={Prevalence and genetic and environmental influences on anxiety disorders in 6-year-old twins},
  author={Derek Bolton and Thalia C. Eley and Thomas G O'Connor and Sean Perrin and Sophia Rabe-Hesketh and Fr{\"u}hling Vesta Rijsdijk and Patrick Smith},
  journal={Psychological Medicine},
  year={2005},
  volume={36},
  pages={335 - 344}
}
Background. Prevalence of childhood anxiety disorders at specific ages and genetic etiological influences on anxiety disorders in young children have been little studied. The present study reports prevalence estimates in a community sample of 6-year-old twins, and patterns of genetic and environmental influences on these early-onset anxiety disorders. Method. Using a two-phase design 4662 twin-pairs were sampled and 854 pairs were assessed in the second phase by maternal-informant diagnostic… 

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