The Influence of Personality Characteristics and Negative Life Events During Adolescence on Depression in Young Adulthood: A Longitudinal Twin Study.

Authors

Eirunn Skaug, Trine Waaktaar, Svenn Torgersen

Published in

Twin research and human genetics : the official journal of the International Society for Twin Studies. Pages 1-12. Jul 10, 2026. Epub Jul 10, 2026.

Abstract

This study examined the influence of personality and negative life events during adolescence on depression in young adulthood, and the extent to which common genetic and environmental influences contributed to these associations. The data come from a Norwegian population based twin sample (N = 3,394). Depression was predicted by higher neuroticism and loneliness, as well as lower sense of coherence, self-efficacy, and resilience. Additionally, weak positive associations were found between negative life events and depression. Common genetic influences accounted for most of the phenotypic associations between depression and both personality and negative life events. The findings emphasize the importance of assessing personality characteristics early in adolescence, as they may serve as vulnerabilities for the development of depression later in life.

PMID:
42429044
Bibliographic data and abstract were imported from PubMed on 10 Jul 2026.

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