Rising Psychotic Disorder diagnoses in Younger Generations raise Concerns, New Study Finds
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A groundbreaking study published in the February issue of CMAJ reveals a significant increase in the diagnosis of psychotic disorders, such as schizophrenia, among individuals born in recent decades, prompting researchers to investigate potential generational shifts in risk factors.The research, encompassing data from over 12 million people born between 1960 and 2005 and tracked from 1993 to 2023, identified 152,587 individuals diagnosed with a psychotic disorder.
Generational Trends in psychotic Disorder Incidence
Researchers from ICES, North York General, the Ottawa Hospital, and Bruyère Health Research Institute discovered that the rate of new diagnoses began to climb for those born in the 1980s and continued to rise in subsequent birth cohorts. Individuals born between 2000 and 2004, as a notable example, exhibited an estimated 70 percent greater rate of new diagnoses compared to those born between 1975 and 1979. Furthermore, the study indicated a 37.5 percent increase in the total number of people diagnosed with a psychotic disorder by age 30 for those born between 1990 and 1994, when compared to the 1975-1979 cohort.
Impact and Implications of Psychotic Disorders
“Psychotic disorders can have profound negative impacts on a person’s life, including their mental and physical health, education, work, and relationships,” explained Dr. Daniel Myran, Gordon F. Cheesbrough Research Chair in Family and Community Medicine at North york General and a scientist at ICES and the Bruyère health Research Institute. While acknowledging that improved healthcare access and earlier diagnosis may contribute to these increases, researchers emphasize the need to explore potential environmental and societal factors impacting younger generations.
Unraveling the Causes: A Complex Puzzle
The study’s authors caution that pinpointing the exact drivers behind this trend is a complex undertaking. “We don’t yet know what’s driving these changes, and it’s likely there isn’t a single clarification,” researchers stated. Potential contributing factors, including early life substance use and having older-aged parents, are being investigated. The incidence rate of psychotic disorders among individuals aged 14 to 20 has increased by 60 percent, rising from 62.5 to 99.7 per 100,000 individuals.
International Context and North American Focus
While international studies have suggested a rise in schizophrenia and other psychotic disorders among young people, frequently enough linked to increased substance use, this study represents the first complete examination of recent birth cohorts specifically within North America. Dr. Marco Solmi, Clinician Investigator at The Ottawa Hospital, Director of Research, Associate Professor and Chair in Evidence-based Mental Health at the University of Ottawa, and co-author of the study, noted the importance of this regional focus.
Study Limitations and Future Research
Researchers acknowledge a limitation in the study’s methodology: individuals born in the 1960s and early 1970s who experienced psychosis in early adulthood but did not engage with the healthcare system were not included in the cumulative estimates. Future research will be crucial to address this gap and to further our understanding of these trends.
Why is this happening? A new study in CMAJ found a significant rise in psychotic disorder diagnoses among younger generations. Researchers believe a combination of factors are at play, including increased healthcare access, earlier diagnosis, and potential environmental or societal influences.
Who is affected?
