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I-AGeD: Informant Assessment of Geriatric Delirium

2013

Caregiver-completed questionnaire to support recognition of delirium on admission in geriatric patients.

At a glance

Purpose
Episodic assessment
Population
Adult
Setting
General / acute hospital
Time
variable
Items
10
Score or threshold
I-AGeD >4

Format: The instrument records 10 scored items or observations. This site classifies it under episodic assessment and informant tools. It is intended for adult use in General / acute hospital. The stated administration time is variable. The published result is recorded using I-AGeD >4.

Primary validation papers

3 identified diagnostic-accuracy papers

Other forms of validation are described in the evidence section. What is counted?

Large-scale clinical implementation

None identified in the scoped review.

None identified in the selected profile sources and the Penfold general-hospital review. This is not a completed search of all settings or later papers.

Training and instructions

Public training resources have not yet been confirmed in this review. Check the linked developer or original source for instructions.

Start here

Tool and original sources

No direct copy is linked here. The original paper and a Google Images search are available below. Image results may be unofficial; check the version and source before use.

Search Google Images ↗ NIDUS information cards ↗

Original and selected diagnostic-accuracy papers

  • Original paperH.F.M. Rhodius-Meester, J.P.C.M. van Campen, W. Fung, D.J. Meagher, B.C. van Munster, J.F.M. de Jonghe. Development and validation of the Informant Assessment of Geriatric Delirium Scale (I-AGeD). Recognition of delirium in geriatric patients. European Geriatric Medicine. 2013. doi: 10.1016/j.eurger.2012.11.006.

    This paper reports the development and initial validation of I-AGeD. It is the main source for the method, its intended use and the evidence available at publication.

    Open source ↗
  • Selected diagnostic-accuracy studyUrfer Dettwiler P, Zúñiga F, Bachnick S, Gehri B, de Jonghe JFM, Hasemann W. Detecting delirium in nursing home residents using the Informant Assessment of Geriatric Delirium (I-AGeD): a validation pilot study. European geriatric medicine. 2022;13(4):917-931. doi: 10.1007/s41999-022-00612-w. PMID: 35143027.

    This diagnostic-accuracy study evaluated I-AGeD in single-centre nursing-home validation pilot against a DSM-5 clinical assessment. It reported sensitivity of 60% and specificity of 94% in 85 nursing-home residents.

    Open PubMed ↗Download article PDF ↓

    Article PDF: CC BY. This licence applies to the article PDF and does not grant rights to reproduce the tool.

Multiple DTA studies identifiedCore instrument family
Classification

Classification

Episodic assessmentInformant tools

A tool may belong to more than one category. Select a linked category to see other relevant profiles.

Evidence

Diagnostic-accuracy evidenceMultiple DTA studies identified

Reported sensitivity and specificity

77%
Sensitivity
63%
Specificity

Construction cohort, cut-off >4; 100% sensitivity in those without dementia.

More evidence and citation details
Full name
Informant Assessment of Geriatric Delirium
Also known as
I-AGeD
Evidence summary
multi
Diagnostic-accuracy evaluations
5
Reference standard
Geriatric-resident DSM-IV admission diagnosis, double-checked by geriatrician/research coordinator using clinical information over the first 48 hours
Citation
H.F.M. Rhodius-Meester, J.P.C.M. van Campen, W. Fung, D.J. Meagher, B.C. van Munster, J.F.M. de Jonghe Development and validation of the Informant Assessment of Geriatric Delirium Scale (I-AGeD). Recognition of delirium in geriatric patients European Geriatric Medicine. 2013;4(2):73-77. doi:10.1016/j.eurger.2012.11.006
Download RIS ↗ Download BibTeX ↗

Primary validation studies

Distinct primary publications from the current diagnostic-accuracy audit. Reviews and repeated evaluations within one paper are not counted again. Overlapping cohorts have not all been reconciled. Read the counting rules and limitations.

Open 3 identified papers
  1. H.F.M. Rhodius-Meester, J.P.C.M. van Campen, W. Fung, D.J. Meagher, B.C. van Munster, J.F.M. de Jonghe (2013). Development and validation of the Informant Assessment of Geriatric Delirium Scale (I-AGeD). Recognition of delirium in geriatric patients. European Geriatric Medicine.

    Reference category: independent clinical reference.

  2. Urfer Dettwiler P, Zúñiga F, Bachnick S, Gehri B, de Jonghe JFM, Hasemann W (2022). Detecting delirium in nursing home residents using the Informant Assessment of Geriatric Delirium (I-AGeD): a validation pilot study. European geriatric medicine.

    Reference category: independent clinical reference.

  3. Celik B, Bilik O, Koçbilek ZD, Damar HT, Öz D, Denizmen Z (2024). Validity and reliability of the Turkish version of the Informant Assessment of Geriatric Delirium Scale. Ideggyogyaszati szemle.

    Reference category: independent clinical reference.

Copyright and reuse
Information checked
2026-07-19

Instrument-specific terms apply. See the access and copyright policy or send a correction.

Base clinical review: 2026-07-29. Instrument description source check: 2026-09-05. Scope and limitations.