Recent research conducted by the University of Waterloo has examined the correlation between long-term stress levels and mental health risks in children with chronic physical illnesses (CPI). The study focuses on hair cortisol, a biological marker that reflects stress over time, and its potential role as an early warning sign for identifying at-risk children.
Approximately 40% of children in Canada are reported to live with a CPI, a figure that has increased over recent decades. These children are at a heightened risk for mental health issues, which can lead to a diminished quality of life and increased healthcare needs. The lead author, Emma Littler, a PhD candidate in Public Health Sciences, noted that the daily challenges faced by these children—such as medication management and school absences—can have significant emotional repercussions.
The four-year study involved 244 Canadian children with CPI, revealing that over two-thirds exhibited consistently high cortisol levels. Those with elevated stress markers were more likely to experience symptoms of depression and anxiety compared to their peers with decreasing cortisol levels. This suggests that monitoring hair cortisol could enable earlier interventions for children at heightened risk for mental health difficulties.
Dr. Mark Ferro, a professor in the School of Public Health Sciences and co-author of the study, emphasized the importance of identifying these risk factors early to facilitate timely support for affected children. The non-invasive nature of hair cortisol collection makes it a promising tool for screening and monitoring stress levels.
In addition to this research, studies from the same team have indicated that blood biomarkers might also predict future mental health challenges in children with CPI. These findings suggest that integrating routine blood tests with mental health evaluations could enhance early detection and support for these vulnerable populations. The study has been published in the journal Stress and Health.