{
  "abstract": "Aim\n\nTo describe temporal trends in bystander cardiopulmonary resuscitation (CPR) and favourable neurological outcomes among older patients with bystander-witnessed out-of-hospital cardiac arrest (OHCA) according to bystander-patient relationship and age.Methods\n\nA total of 322,943 patients aged ≥65 years with bystander-witnessed OHCA of cardiac origin were enrolled from the All-Japan Utstein Registry (2005-2022). Patients were stratified by age (65-74, 75-89, and ≥90 years) and bystander type (family member, friend/colleague/passerby, or other). Temporal trends in the proportions of bystander CPR and favourable neurological outcome at 1-month, defined as Cerebral Performance Category (CPC) 1-2, were assessed using the Cochran-Armitage test.Results\n\nDuring the study period, the annual proportions of bystander CPR and CPC 1-2 in family member-witnessed OHCAs significantly increased across all age groups (all p for trend <0.001). However, bystander CPR remained at approximately 50% in all age groups. In other-witnessed OHCAs, bystander CPR also significantly increased across all age groups (all p for trend <0.001). However, CPC 1-2 significantly increased only in those aged 65-74 years (p for trend <0.05), with no significant temporal trend in older groups. Among those aged ≥90 years, bystander CPR increased to approximately 80%, whereas CPC 1-2 remained at approximately 1%, with no significant temporal trend.Conclusions\n\nTemporal trends in bystander CPR and CPC 1-2 varied according to bystander-patient relationship and age. Further investigation is warranted to identify the factors underlying the observed differences in bystander CPR and favourable neurological outcomes.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Cardiology, Osaka Saiseikai Senri Hospital, 1-1-6 Tsukumodai, Suita, Osaka 565-0862, Japan.",
    "Department of Cardiology, Kanazawa University Graduate School of Medicine, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641, Japan.",
    "Department of Emergency and Critical Care Center, Noto General Hospital, 6-4 A-bu, Fujihashi-machi, Nanao, Ishikawa 926-0816, Japan.",
    "Department of Biostatistics, School of Medicine, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan.",
    "Department of Cardiovascular Medicine, Kyushu University, 3-1-1 Maidashi, Higasi-Ku, Fukuoka, Fukuoka 812-8582, Japan.",
    "Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, 6-1 Kishibe-shinmachi, Suita, Osaka 564-8565, Japan."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Akira Funada"
    },
    {
      "affs": [
        2
      ],
      "name": "Yoshikazu Goto"
    },
    {
      "affs": [
        1
      ],
      "name": "Masayuki Takamura"
    },
    {
      "affs": [
        3
      ],
      "name": "Naohiro Yonemoto"
    },
    {
      "affs": [
        4
      ],
      "name": "Tetsuya Matoba"
    },
    {
      "affs": [
        5
      ],
      "name": "Yoshio Tahara"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/37m5e3peq82fq.bib",
  "cited_by": 0,
  "doi": "10.1016/j.resplu.2026.101525",
  "fulltext_url": "https://europepmc.org/articles/PMC13695377",
  "id": "37m5e3peq82fq",
  "issns": [
    "2666-5204"
  ],
  "landing_url": "https://europepmc.org/article/MED/42927342",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2711|Cardiac Arrest and Resuscitation"
    ]
  ],
  "openalex": "W7220867487",
  "pdf_url": "https://europepmc.org/articles/PMC13695377?pdf=render",
  "pmcid": "PMC13695377",
  "pmid": "42927342",
  "published": "2026-10-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/37m5e3peq82fq.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:18Z",
      "native_id": "MED:42927342",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42927342"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2711|Cardiac Arrest and Resuscitation",
      "subfield": "general"
    }
  ],
  "title": "Temporal trends in bystander cardiopulmonary resuscitation and favourable neurological outcome among older patients with out-of-hospital cardiac arrest stratified by bystander-patient relationship and age: a JCS-ReSS study.",
  "title_text": "Temporal trends in bystander cardiopulmonary resuscitation and favourable neurological outcome among older patients with out-of-hospital cardiac arrest stratified by bystander-patient relationship and age: a JCS-ReSS study.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:21:18Z",
  "url": "https://research.draconitic.com/paper/37m5e3peq82fq",
  "venue": "Resuscitation plus",
  "versions": []
}