Longitudinal twin study assesses how adolescence influences depression in young adulthood, suggesting early personality evaluation may help identify vulnerabilities.
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.
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Skaug et al. (2026) studied this question.
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