A twin study of genetic and environmental influences on psychological traits of eating disorders in a Japanese female sample

Toshimitsu Kamakura, Juko Ando, Yutaka Ono, Hiroko Maekawa

Research output: Contribution to journalArticle

14 Citations (Scopus)


The purpose of the present study was to clarify genetic and environmental origins of psychological traits of eating disorders using a Japanese female twin sample. Participants were 162 pairs of female twins consisting of 116 pairs of monozygotic (MZ) twins and 46 pairs of dizygotic (DZ) twins in their adolescence. Psychological traits of eating disorders were assessed with five subscales of the Eating Disorder Inventory (EDI). As a result of using univariate twin analyses, among five subscales of EDI (maturity fears, ineffectiveness, interpersonal distrust, interoceptive awareness, and perfectionism), perfectionism showed significant additive genetic contributions and individual specific environmental effects. On the other hand, maturity fears, ineffectiveness, interoceptive awareness, and interpersonal distrust indicated significant shared environment contributions and individual specific environment effects. The results suggest the importance of both genetic and shared environmental influences on psychological traits of eating disorders in the present study.

Original languageEnglish
Pages (from-to)292-296
Number of pages5
JournalTwin Research
Issue number4
Publication statusPublished - 2003 Aug 1


ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Obstetrics and Gynaecology
  • Genetics(clinical)

Cite this