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ArticlePCN reports : psychiatry and clinical neurosciences2026

Clinical characteristics and risk factors associated with consultation-confirmed delirium in hospitalized patients.

Megumi Matsuda, Kazuhiko Yamamuro, Masatsugu Ikeuchi, Akihiro Minami, Izumi Harada, Takahira Yamauchi, Tetsuro Kitamura, Yasuyo Kobayashi, Yukako Ishida, Yusuke Inagaki and 3 more

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Article in PCN reports : psychiatry and clinical neurosciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

What it found

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

13 authors.

Megumi MatsudaPsychiatric Center Nara Medical University Hospital Kashihara Japan.
Kazuhiko YamamuroCenter for Health Control Nara Medical University Kashihara Japan.ORCID https://orcid.org/0000-0002-4362-3262
Masatsugu IkeuchiDepartment of Neurosurgery Nara Medical University Hospital Kashihara Japan.
Akihiro MinamiDepartment of Psychiatry Nara Medical University Kashihara Japan.
Izumi HaradaDepartment of Psychiatry Nara Medical University Kashihara Japan.
Takahira YamauchiDepartment of Psychiatry Nara Medical University Kashihara Japan.
Tetsuro KitamuraDepartment of Rehabilitation Medicine Nara Medical University Kashihara Japan.
Yasuyo KobayashiDepartment of Rehabilitation Medicine Nara Medical University Kashihara Japan.
Yukako IshidaDepartment of Nursing Nara Medical University Hospital Kashihara Japan.
Yusuke InagakiDepartment of Rehabilitation Medicine Nara Medical University Kashihara Japan.
Jyunko MinamiguchiDepartment of Nursing Nara Medical University Hospital Kashihara Japan.
Akira KidoDepartment of Rehabilitation Medicine Nara Medical University Kashihara Japan.
Takashi OkadaDepartment of Psychiatry Nara Medical University Kashihara Japan.ORCID https://orcid.org/0000-0001-5580-9913

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Aim: Delirium, a serious neuropsychiatric hospitalization complication, is a manifestation of underlying neurocognitive vulnerability rather than an acute event. In Japan, a nationwide medical policy mandates early hospital-wide delirium risk screening to evaluate predefined risk factors in inpatient populations. We aimed to identify demographic and clinical factors independently associated with referral-based, consultation-confirmed delirium. Methods: We conducted a retrospective observational study of consecutive hospitalized patients at Nara Medical University Hospital between June 2022 and November 2023, without exclusion criteria. Delirium risk factors were assessed within 3 days of admission using a standardized checklist based on national criteria. Delirium was diagnosed following specialist consultation according to the International Classification of Diseases, 10th Revision (ICD-10), and the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision criteria. Logistic regression analyses were performed to identify independent association with consultation-confirmed delirium. Results: Among 20,980 patients (mean age, 67.1 ± 17.0 years; males, 55.0%), 209 (1.0%) were diagnosed with delirium following specialist consultation. Overall, 56.4% met at least one predefined risk criterion at admission. In multivariable analyses adjusted for age and sex, dementia (odds ratio [OR], 3.995; 95% confidence interval [CI], 2.647-6.029), history of delirium (OR, 3.649; 95% CI, 2.158-6.170), and heavy alcohol use (OR, 1.648; 95% CI, 1.002-2.710) were independently associated with consultation-confirmed delirium. Conclusions: In this large cohort evaluated under a nationwide screening framework, consultation-confirmed delirium was independently associated with baseline neurocognitive vulnerability (dementia and history of delirium) and heavy alcohol use, rather than chronological age alone, supporting vulnerability-focused risk stratification in routine clinical practice.

Indexed as

consultation‐liaison psychiatrydeliriumdementiahospitalizationrisk factors

Identifiers

PMID42534337
PMCPMC13420208

What Socratic holds

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.