Rising Rates of Psychosis in Ontario’s Youth Demand Attention

A recent study conducted in Ontario reveals a significant increase in the rates of psychosis among younger generations. The research, published in the Canadian Medical Association Journal, analyzed data from 12.2 million individuals born in Ontario between 1960 and 2009. The findings indicate that diagnoses of psychotic disorders, including schizophrenia, have surged by 60 percent among individuals aged 14 to 20 years from 1997 to 2023.

The study highlights a worrying trend, particularly among those born between 2000 and 2004, who have a 70 percent higher rate of psychotic disorder diagnoses compared to their counterparts born between 1975 and 1979. These findings raise important questions regarding the underlying causes of this alarming rise in mental health issues within this demographic.

Dr. Daniel Myran, a physician and scientist at the Bruyère Health Research Institute and the Institute for Clinical Evaluative Sciences (ICES), noted that he had previously observed signs of increasing psychosis rates among younger individuals during research focused on Canada’s cannabis policy. He expressed surprise at the scale of the increase revealed in this latest study, emphasizing the urgent need to investigate the factors contributing to these trends.

The implications of rising psychosis rates are profound, as individuals with psychotic disorders face significant health challenges, including a higher risk of premature death and a need for extensive health services and social support. Dr. Myran acknowledged some limitations in the research, particularly the lack of comparable data for older birth cohorts. Nonetheless, it is evident that there has been a substantial increase in psychosis diagnoses in recent decades.

One potential factor in this increase may be attributed to improved access to mental health care in Ontario that began in the early 2000s. The province has established effective early psychosis intervention programs, such as the On Track: First Episode Psychosis Program, which has been operational for the past 20 years. Dr. Myran suggested that these programs might contribute to the rise in diagnoses among younger individuals, indicating that the health system is identifying psychosis more effectively. However, he cautioned that this explanation alone does not capture the complexity of the issue.

Dr. Myran believes that multiple factors are likely contributing to the trend. He stated, “It raises concerns that there are some social or environmental changes that are occurring that are causing an increase.” Further research is essential to understand the motivations behind this trend. He emphasized, “We don’t yet know what’s driving these changes, and it’s likely there isn’t a single explanation. Understanding what’s behind this trend will be critical to prevention and early support.”

Substance use is another potential contributor to the rising rates of psychosis among younger generations in Ontario. Dr. Myran noted that early substance use is linked to the development and exacerbation of psychotic disorders. Over the past two decades, substance use in Canada has indeed increased, suggesting a correlation with the rising diagnoses of psychosis.

The collaborative research was conducted by teams from ICES, The Ottawa Hospital Research Institute, Bruyère Health Research Institute, and North York General. The findings serve as a call to action for further investigation into the factors driving the increase in psychosis among younger individuals in Ontario, with the aim of enhancing prevention strategies and providing timely support to those in need.