Most mental health disorders not increasing in children and youth: Large Canadian study
News Nov 03, 2014
Suicidal thoughts and attempts on decline
Symptoms of mental illness in children and adolescents do not appear to be increasing, according to a large study of Canadian youth published in CMAJ (Canadian Medical Association Journal)
"Popular media tends to perpetuate the idea that the prevalence of mental disorders is increasing," writes Dr. Ian Colman, Canada Research Chair in Mental Health Epidemiology and associate professor at the University of Ottawa, Ottawa, Ontario, with coauthors. "However, research supporting this position has been inconsistent."
Dr. Colman and colleagues sought to better understand whether symptoms of mental illness are increasing, specifically hyperactivity, aggression, depression and anxiety, suicidal thinking and behaviour. They looked at data from the National Longitudinal Survey of Children and Youth, which involves a group of children and adolescents from across the country who are followed every two years. Their study included 11 725 children aged 10–11 years (1994/95–2004/05), 10 574 aged 12–13 years (1996/97–2006/07) and 9835 aged 14–15 years (1998/99–2008/09). Participants were asked by confidential questionnaire to describe their feelings and behaviours and the frequency at which they experienced them in the previous week.
- ♦ Depression and anxiety: mean symptom scores did not change significantly in children aged 10–11 years and 12–13 years.
- ♦ There was a small but statistically significant decline in depression and anxiety in adolescents aged 14–15.
- ♦ Physical aggression and indirect aggression such as antisocial or manipulative behaviour declined in all three age groups.
- ♦ Suicidal behaviour: a decline in the percentage of youth aged 12–13 and 14–15 years who reported or attempted suicide.
- ♦ Hyperactivity increased significantly in children aged 10–11 and 12–13 years.
"Encouragingly, results from this study suggest that suicidal ideation and suicide attempts may be declining," write the authors.
The authors suggest that perceptions of increases in prevalence of mental illness may be a result of successful efforts to destigmatize mental illness, which can lead to increased recognition of symptoms and treatment-seeking behaviour.
"Though there is no conclusive evidence for the efficacy of various efforts in preventing suicide, some strategies, including physician education and certain school-based strategies, show promise in reducing suicidal behaviours. Continued effort in suicide prevention, rigorous research into the efficacy of prevention programs, and improved interventions targeting mental illness in adolescents is crucial for improving the mental health of Canadian adolescents," they conclude.
Note: Material may have been edited for length and content. For further information, please contact the cited source.
Seanna E. McMartin, Mila Kingsbury, Jennifer Dykxhoorn, Ian Colman. Time trends in symptoms of mental illness in children and adolescents in Canada. CMAJ, Published online November 3 2014. doi: 10.1503/cmaj.140064
Neurons in the human brain receive electrical signals from thousands of other cells, and long neural extensions called dendrites play a critical role in incorporating all of that information. Using hard-to-obtain samples of human brain tissue, MIT neuroscientists have now discovered that human dendrites have different electrical properties from those of other species.
When we’re born, our brains have a great deal of flexibility. Having this flexibility to grow and change gives the immature brain the ability to adapt to new experiences and organize its interconnecting web of neural circuits. As we age, this quality, called “plasticity,” lessens. Now, a study has shown that supportive astrocyte cells help enable this plasticity.READ MORE
Previous work by the International Multiple Sclerosis Genetics Consortium (IMSGC) has identified 233 genetic risk variants. However, these only account for about 20% of overall disease risk, with the remaining genetic culprits proving elusive. A new study has tracked down four of these hard-to-find genes.READ MORE