# Are common mental disorders becoming more persistent over time? Findings from the Netherlands Mental Health Survey and Incidence Studies (NEMESIS)

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- Page title: Are common mental disorders becoming more persistent over time? Findings from the Netherlands Mental Health Survey and Incidence Studies (NEMESIS) | WCP 2026 Summary

> In a Dutch community sample, the 3-year persistence of common mental disorders, using a broad definition, increased from 42.7% to 57.9% over 12 years.

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EV0553

E-PosterHalk Sağlığı ve EpidemiyolojiKohort

# Are common mental disorders becoming more persistent over time? Findings from the Netherlands Mental Health Survey and Incidence Studies (NEMESIS)

ARE COMMON MENTAL DISORDERS MORE PERSISTENT OVER TIME? INSIGHTS FROM THE NETHERLANDS MENTAL HEALTH SURVEY AND INCIDENCE STUDIES (NEMESIS)

Sunan: Artemis Gkitakou

Ülke: Netherlands

Kurum: Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Psychiatry

In a Dutch community sample, the 3-year persistence of common mental disorders, using a broad definition, increased from 42.7% to 57.9% over 12 years.

The study aimed to examine whether the reported 63.7% increase in the 12-month prevalence of mental disorders in NEMESIS between 2007-2009 and 2019-2022 was attributable solely to new cases or also to increased persistence, and to identify the 12-year change in the 3-year persistence of anxiety, mood, and substance use disorders and its determinants. Two community-based samples were used: NEMESIS-2 (N=6,646, ages 18-64, assessments in 2007-2009 and 2010-2012) and NEMESIS-3 (N=6,194, ages 18-75, assessments in 2019-2022 and 2023-2024). Diagnoses were established using the CIDI 3.0 according to DSM-IV criteria (and additionally DSM-5 criteria in NEMESIS-3). Persistence was defined from two perspectives: narrow (the presence of the same diagnostic category at follow-up) and broad (the presence of any anxiety, mood, and/or substance use disorder at follow-up). Broad persistence for any mental disorder increased from 42.7% (NEMESIS-2, 2007-2012) to 57.9% (NEMESIS-3, 2019-2024). Using the narrow definition, persistence increased from 24.4% to 40.1% for anxiety disorders, from 33.5% to 48.8% for mood disorders, and from 33.7% to 45.5% for substance use disorders. Using the broad definition, persistence increased from 48.5% to 58.8% for anxiety disorders, from 49.6% to 64.7% for mood disorders, and from 48.7% to 60.5% for substance use disorders. In NEMESIS-3, 3-year broad persistence calculated using DSM-5 diagnoses was 55.2% for any mental disorder, 57.1% for anxiety disorders, 63.2% for mood disorders, and 55.1% for substance use disorders. The determinants of persistence remained unchanged over time. The authors emphasize that increasing persistence calls for long-term follow-up and care models that extend beyond diagnosis-specific treatment.

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APA 7: Gkitakou, A., Ten Have, M., Batelaan, N. M., Luik, A. I., & Penninx, B. W. (2026, September 23-26). Are common mental disorders more persistent over time? insights from the netherlands mental health survey and incidence studies (nemesis) [E-poster]. 26th WPA World Congress of Psychiatry (WCP 2026), Stockholm, Sweden. https://cslide.ctimeetingtech.com/wcp26/attendee/eposter/file/828

Vancouver: Gkitakou A, Ten Have M, Batelaan NM, Luik AI, Penninx BW. Are common mental disorders more persistent over time? insights from the netherlands mental health survey and incidence studies (nemesis) [e-poster]. 26th WPA World Congress of Psychiatry (WCP 2026); 2026 Sep 23-26; Stockholm, Sweden. Available from: https://cslide.ctimeetingtech.com/wcp26/attendee/eposter/file/828

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