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FIDDI: Family ICU Delirium Detection Instrument

2026

A five-item family-completed ICU questionnaire taking under five minutes. Initial work established feasibility, internal consistency and construct validity, but not diagnostic accuracy against an expert delirium reference standard.

At a glance

Purpose
Episodic assessment
Population
Adult
Setting
Intensive care
Time
<5 min
Items
5

Format: FIDDI contains five family-observed indicators and is designed for completion in under five minutes. It should be used as an adjunct to clinical assessment, not as a validated replacement for bedside delirium examination.

Primary validation papers

0 identified diagnostic-accuracy papers

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

Large-scale clinical implementation

Not yet reviewed.

A focused implementation review has not yet been completed for this profile.

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

This record describes a method rather than a downloadable bedside form. The main source is linked below.

Read the full paper ↗

Original paper

  • Original paperKrewulak KD, Arakawa NC, Deemer K, Jaworska N, Kissel KA, Longmore S, et al. Development and Validation of the Family ICU Delirium Detection Instrument. Critical care explorations. 2026;8(1):e1335. doi: 10.1097/CCE.0000000000001335. PMID: 41481007.

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

    Open PubMed ↗Download article PDF ↓

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

No eligible DTA study identifiedEmerging clinical record
Classification

Classification

Episodic assessmentInformant toolsUse in intensive care units

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

Evidence

Diagnostic-accuracy evidenceNo eligible DTA study identified

Reported sensitivity and specificity

not established
Sensitivity
not established
Specificity

The development study did not compare FIDDI with an independent expert delirium diagnosis.

More evidence and citation details
Full name
Family ICU Delirium Detection Instrument
Also known as
FIDDI
Evidence summary
development-only
Citation
Krewulak KD, Arakawa NC, Deemer K, Jaworska N, Kissel KA, Longmore S, Maclean M, Mickelson P, Mok M, Oggy T, Poulin TG, Reyes J, Selig M, Sept B, Lee CH, Shulman RW, Stelfox HT, Fiest KM Development and Validation of the Family ICU Delirium Detection Instrument Critical care explorations. 2026;8(1):e1335. PMID 41481007
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.

No eligible diagnostic-accuracy paper is currently included in this audit. This does not mean the tool has never been validated. The source paper and other evidence on this profile may concern severity, reliability or another measurement purpose.

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.