Genetic and Environmental Factors in Alexithymia: A Population-Based Study of 8,785 Danish Twin Pairs

  title={Genetic and Environmental Factors in Alexithymia: A Population-Based Study of 8,785 Danish Twin Pairs},
  author={Michael Martini J{\o}rgensen and Robert Zachariae and Axel Skytthe and Kirsten Ohm Kyvik},
  journal={Psychotherapy and Psychosomatics},
  pages={369 - 375}
Background: The role of genetic and environmental factors for developing alexithymia is still unclear, and the aim of this study was to examine these factors in a large population-based sample of twins. Methods: The Toronto Alexithymia Scale-20 (TAS-20) was included in a mail survey of 46,418 individuals born between 1931 and 1982 and registered with the Danish Twin Registry. The response rate was 75.3%. A total of 8,785 twin pairs, where both cotwins had completed all items of the TAS-20, were… 

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