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Lau, J.Y. et al.

Lau, Eley,

Changes in genetic and environmental influences on depressive symptoms across adolescence and young adulthood.

BACKGROUND: Depression rises markedly in adolescence, a time when increased and new genetic influences have been reported. AIMS: To examine'new'and'stable' genetic and environmental factors on depressive symptoms in adolescence and young adulthood. METHOD: Aquestionnaire survey investigated a sample of twin and sibling pairs atthree time points over an approximately 3-year period. Over 1800 twin and sibling pairs reported depressive symptoms atthe three time points. Data were analysed using multivariate genetic models. RESULTS: Depressive symptoms at all time points were moderately heritable with substantial non-shared environmental contributions. Wave 1 genetic factors accounted for continuity of symptoms at waves 2 and 3. 'New'genetic effects at wave 2 also influenced wave 3 symptoms. New non-shared environmental influences emerged at each time point. CONCLUSIONS: New genetic and environmental influences may explain age-related increases in depression across development.[1]

References

Changes in genetic and environmental influences on depressive symptoms across adolescence and young adulthood. Lau, J.Y., Eley, T.C. The British journal of psychiatry : the journal of mental science. (2006) [Pubmed]

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