Increased Persistence of Common Mental Disorders Among Dutch Adults Over the Past Decade

The study analyzed data from two groups of adults, with the first survey occurring from 2007 to 2009 and the follow-up from 2019 to 2022. In the later survey, 55.2% of adults diagnosed with a mental disorder still faced the same issues three years later; nearly 40% experienced disorders from the same category.

Notably, anxiety disorders showed a marked increase in persistence, with those still experiencing anxiety after three years rising from 24.4% to 40.1%. Over the decade studied, the prevalence of anxiety disorders among adults increased from 10.1% to 15.6%, while mood disorders rose from 6.0% to 10.8% and substance use disorders from 5.5% to 7.1%.

Previous studies examined possible links between socioeconomic factors and the prevalence of mental illness, but these did not account for the observed trends. The researchers suggest two possible explanations: either more individuals are developing mental health issues for the first time, or those already affected are taking longer to recover.

Tracking the duration of mental health problems is essential for future prevention and treatment strategies. The study involved randomly selected participants from national population registers to ensure representative results, utilizing data from the Netherlands Mental Health Survey and Incidence Study (NEMESIS). NEMESIS-2 included 6,646 adults, while NEMESIS-3 included 6,194 adults.

Results indicated that narrow persistence for anxiety disorders increased from 24% to 40%, and for mood disorders, it rose from about 34% to 49%, with similar trends observed for substance use disorders. Broad persistence, covering any common mental disorder, also increased by over 15 percentage points between the two timeframes.

These findings suggest a need for a more comprehensive approach to mental health care, advocating for ongoing monitoring and better long-term support alongside prevention and short-term treatment.