{
  "abstract": "Introduction: Very high cumulative exposure to electroconvulsive therapy (ECT) has primarily been described in individual case reports. We examined cumulative ECT exposure in a nationwide Japanese claims database to characterize patients receiving very high numbers of treatments.\n\nMethods: We identified 3,733 patients who received ECT and classified them according to cumulative ECT exposure. Clinical characteristics of patients receiving 100 or more treatments were examined.\n\nResults: Among 3,733 patients who received ECT, 39 (1.0%) received 100 or more treatments. These patients had treatment durations of several years and substantially greater numbers of psychiatric hospitalizations and cumulative hospitalization days. Clozapine use increased across cumulative ECT exposure categories, although it was recorded in only 13% of patients receiving 100 or more treatments.\n\nConclusion: Patients receiving 100 or more ECT treatments represent an identifiable subgroup of ECT recipients characterized by prolonged and recurrent psychiatric care.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Psychiatry Osaka University Graduate School of Medicine Osaka Japan",
    "Kosaka Hospital Osaka Japan",
    "Clinical Research and Education Center Asakayama General Hospital Osaka Japan",
    "Department of Occupational Therapy, Graduate School of Rehabilitation Science Osaka Metropolitan University Osaka Japan",
    "Department of Neuropsychiatry Wakayama Medical University Wakayama Japan"
  ],
  "article_type": "brief report",
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Masahiro Hata",
      "orcid": "0000-0003-3837-1504"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Yuki Miyazaki",
      "orcid": "0000-0003-4952-0886"
    },
    {
      "affs": [
        0,
        2,
        3,
        4
      ],
      "name": "Shun Takahashi",
      "orcid": "0000-0002-9049-4694"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8tg5d0ep7xp80.bib",
  "cited_by": 0,
  "doi": "10.1111/acps.70137",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13727353/",
  "id": "8tg5d0ep7xp80",
  "issns": [
    "0001-690X",
    "1600-0447"
  ],
  "landing_url": "https://doi.org/10.1111/acps.70137",
  "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 Letter"
    ],
    [
      "openalex",
      "2738|Electroconvulsive Therapy Studies"
    ]
  ],
  "openalex": "W7204269575",
  "pdf_url": "https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/acps.70137",
  "pmcid": "PMC13727353",
  "pmid": "42643068",
  "published": "2026-08-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8tg5d0ep7xp80.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T12:23:27Z",
      "native_id": "PMC13727353",
      "source": "pmc",
      "url": "https://doi.org/10.1111/acps.70137"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2738|Electroconvulsive Therapy Studies",
      "subfield": "psychiatry"
    }
  ],
  "title": "Patients Receiving 100 or More Electroconvulsive Therapy Treatments in a Nationwide Cohort",
  "title_text": "Patients Receiving 100 or More Electroconvulsive Therapy Treatments in a Nationwide Cohort",
  "type": "peer-reviewed",
  "updated_at": "2026-11-06T12:23:03Z",
  "url": "https://research.draconitic.com/paper/8tg5d0ep7xp80",
  "venue": "Acta Psychiatrica Scandinavica",
  "versions": []
}