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Depressive symptoms in children and adolescents: changing aetiological influences with development

Scourfield, Jane, Rice, Frances ORCID:, Thapar, Anita ORCID:, Harold, Gordon Thomas, Martin, Neilson and McGuffin, Peter 2003. Depressive symptoms in children and adolescents: changing aetiological influences with development. Journal of Child Psychology and Psychiatry 44 (7) , pp. 968-976. 10.1111/1469-7610.00181

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BACKGROUND: Evidence suggests that depressive symptoms become increasingly heritable as children grow into adolescence. However, the literature is not entirely consistent in this respect and existing longitudinal twin studies have examined changes within adolescence only. METHOD: Parent and self-report questionnaire data were used to examine the genetic and environmental influences on depressive symptoms in a UK sample of 670 twin pairs aged 5-17. Age effects were examined cross-sectionally and longitudinally using data collected over a 3-year period. RESULTS: Cross-sectional analyses showed that shared environmental effects had significant influence in younger children but not in adolescence, when depression scores were significantly more heritable. The results of these cross-sectional analyses were supported when two waves of parent-report data collected over three years were analysed. Significant new genetic influences emerged in adolescence but no new shared environmental influences. Some sex differences were found, with girls showing greater genetic influence than boys, but only from parent-report data. CONCLUSIONS: These findings support and extend earlier work which has shown increasing genetic influence on depressive symptoms as children grow into adolescence.

Item Type: Article
Date Type: Publication
Status: Published
Schools: MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: R Medicine > R Medicine (General)
Publisher: Wiley-Blackwell
ISSN: 0021-9630
Last Modified: 31 Oct 2022 09:40

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