{
  "abstract": "Reports suggest rising trends in non-suicidal self-injury (NSSI) and disordered eating (DE) amid worsening adolescent mental health; however, the use of single-item measures obscures these findings. Moreover, there are no studies of time trends in NSSI/DE co-occurring with other mental health problems. The present study used multi-item measures to examine time trends in the prevalence of NSSI, DE, other mental health problems, and their co-occurrence in two separate school cohorts (2007/2008; 2024/2025) in the same Swedish municipality. Clinically relevant cutoffs were applied to self-report measures of NSSI (revised Deliberate Self-Harm Inventory), DE (Risk Behaviour related to Eating Disorders; girls only), and mental health problems (MHP; Strengths and Difficulties Questionnaire – self-report). Analyses included gender-stratified mixed models (time trends per outcome) and binominal generalized log-linear models (time trends in NSSI/DE×MHP concurrence). Response rates were ≈ 90% in 2007/2008 (N = 987–992; Mage = 13.71–14.76) and ≈ 80% in 2024/2025 (N = 810–836; Mage = 13.71–14.79). Among girls, there were threefold increases in the prevalence of repetitive NSSI and high-risk DE combined with other mental health problems (NSSI + MHP from 6.6 to 21.0%; DE + MHP from 2.7 to 8.7%). The prevalence of repetitive NSSI or high-risk DE without co-occurring mental health problems did not change. Among boys, there was no increase in repetitive NSSI with/without other mental health problems. The rising trends in the prevalence of NSSI and DE among girls indicate worsening mental health, suggesting a need for increased attention and action from the healthcare system.\n\nSupplementary Information: The online version contains supplementary material available at https://doi.org/10.1007/s00787-026-03105-4.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Psychology, Kristianstad University, Kristianstad, 291 88 Sweden",
    "Department of Psychology, Lund University, Lund, 221 00 Sweden"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Benjamin Claréus",
      "orcid": "0000-0003-0972-6660"
    },
    {
      "affs": [
        1
      ],
      "name": "Lars-Gunnar Lundh",
      "orcid": "0000-0002-1649-969X"
    },
    {
      "affs": [
        1
      ],
      "name": "Margit Wångby-Lundh",
      "orcid": "0000-0002-8096-9641"
    },
    {
      "affs": [
        1
      ],
      "name": "Jonas Bjärehed",
      "orcid": "0000-0002-2128-6031"
    },
    {
      "affs": [
        1
      ],
      "name": "Daiva Daukantaitė",
      "orcid": "0000-0002-1994-041X"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/em24vt3hzne4z.bib",
  "cited_by": 1,
  "doi": "10.1007/s00787-026-03105-4",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13696555/",
  "id": "em24vt3hzne4z",
  "issns": [
    "1018-8827",
    "1435-165X"
  ],
  "landing_url": "https://doi.org/10.1007/s00787-026-03105-4",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Research"
    ],
    [
      "openalex",
      "3203|Suicide and Self-Harm Studies"
    ]
  ],
  "openalex": "W7165538491",
  "pdf_url": "https://link.springer.com/content/pdf/10.1007/s00787-026-03105-4.pdf",
  "pmcid": "PMC13696555",
  "pmid": "42329373",
  "published": "2026-06-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/em24vt3hzne4z.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:53Z",
      "native_id": "PMC13696555",
      "source": "pmc",
      "url": "https://doi.org/10.1007/s00787-026-03105-4"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:3203|Suicide and Self-Harm Studies",
      "subfield": "psychiatry"
    }
  ],
  "title": "Time trends in non-suicidal self-injury, disordered eating, and mental health problems between 2007 and 2025: a comparison of two Swedish adolescent cohorts",
  "title_text": "Time trends in non-suicidal self-injury, disordered eating, and mental health problems between 2007 and 2025: a comparison of two Swedish adolescent cohorts",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:33:52Z",
  "url": "https://research.draconitic.com/paper/em24vt3hzne4z",
  "venue": "European Child & Adolescent Psychiatry",
  "versions": []
}