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BACKGROUND This study presents an integrative data analysis of the association between frequency of cannabis use and severity of depressive symptoms using data from four Australasian cohort studies. The integrated data comprised observations on over 6900 individuals studied on up to seven occasions between adolescence and mature adulthood. METHODS(More)
The present research employed a prospective, multi-informant design to examine precursors and correlates of differing anxiety profiles from late childhood to late adolescence. The sample consisted of 626 boys and 667 girls who are participants in the Australian Temperament Project, a large, longitudinal, community-based study that has followed young(More)
Anxiety problems and associated temperamental traits are multifactorial, determined by the interaction of genetic and environmental factors. Genetic effects may involve both neurotransmitters and hormones. A good candidate gene for association with anxiety-related traits is the estrogen receptor (ESRalpha). Estrogen exerts an effect on mood and behavior in(More)
Little is known about behavioural and emotional adjustment in children in Sri Lanka, and this study is the first attempt to assess mental health problems in this population. Using the Strengths and Difficulties Questionnaire (Goodman R (1994) A modified version of the Rutter parent questionnaire including items on children's strengths: a research note. J(More)
BACKGROUND This study examined the impact of family transitions, that is, parental separation, divorce, remarriage and death, upon the lives of Australian children and adolescents in a longitudinal study of temperament and development. METHODS Using longitudinal and concurrent questionnaire data, outcomes for young people experiencing transitions were(More)
Young drivers are significantly over-represented among those injured or killed in road traffic accidents. Young adults' greater tendency to engage in risky driving behaviours has been implicated in their high crash involvement rate. While considerable research has examined the driving patterns of young adults and situational factors associated with their(More)
OBJECTIVE To replicate an earlier Finnish study by Keltikangas-Järvinen et al. (5) reporting that the APOE genotype is associated with temperamental traits involving increased activity. METHODS DNA was collected from 683 Australian children who had participated in a longitudinal study of childhood temperament from 4 to 8 months up to 17 to 18 years.(More)
This study examined the stability of risky driving behaviour from late adolescence to early adulthood among 823 young Australian drivers participating in an ongoing longitudinal study. This issue was explored by examining the stability of risky driving between the ages of 19-20 and 23-24 years (1) across the cohort and (2) among individuals. Focusing on(More)