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September 5, 2025Open Access

Nationwide time trends in co-occurring mental illness and substance use disorders among adolescents and young adults: differences in diagnoses, age, gender, and educational attainment between 2010 and 2022

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Authors

JJJosefine Skou JakobsenKJKatrine Schepelern JohansenBTBirgitte Thylstrup

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Overview

Analysis shows increasing dual diagnosis among adolescents and young adults in Denmark, indicating shifts by age, gender, and educational level.

Key Points

  • Dual diagnosis occurred frequently among males and young adults aged 22–25 during the study period.
  • A substantial increase in dual diagnosis cases was noted from 2010 to 2017, followed by a decline.
  • Adolescents and young adults with schizophrenia and cannabis-related disorders had a higher incidence of dual diagnosis.
  • Proportions of those enrolled in substance use treatment at first diagnosis increased, yet follow-up enrollment decreased.

Cite This Study

Jakobsen et al. (2025) studied this question.

synapsesocial.com/papers/68c23887b210217d64777b92https://doi.org/10.21203/rs.3.rs-7115166/v1
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Substance Abuse: A growing issue in adolescent population2025
  2. 2Trends in treatment attendance for substance use disorders among adolescents and emerging adults in Australia, 2003-20202025
  3. 3Co‑occurring mental and substance use disorders among residents of Drug Addiction Rehabilitation Centers (DARCs) in Japan: Characterizing dual‑diagnosis profiles2025
  4. 4Prevalence of mental disorders among young males in Swedish compulsory residential care2025
  5. 5Use of attention deficit hyperactivity disorder medication among Danish children and adolescents from 2010-20202025