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TDDS: Terminal Delirium-Related Distress Scale

2021

A 24-item bereaved-family questionnaire covering distress and perceived care around irreversible terminal delirium. It evaluates experience and care quality; it does not detect or diagnose delirium.

At a glance

Purpose
Experience and impact
Population
Bereaved relatives of adults with cancer who experienced irreversible terminal delirium
Setting
Palliative care
Time
self-completed retrospective questionnaire; formal completion time not reported
Items
24
Score or threshold
None for delirium detection or diagnosis

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.

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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.

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Original paper

  • Principal sourceUchida M, Akechi T, Morita T, Shima Y, Igarashi N, Miyashita M, et al. Development and validation of the Terminal Delirium-Related Distress Scale to assess irreversible terminal delirium. Palliative & supportive care. 2021;19(3):287-293. doi: 10.1017/S1478951520001340. PMID: 33397541.

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

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No eligible DTA study identifiedRelated context
Classification

Classification

Experience and impactDetailed phenomenological and/or neuropsychological assessment

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Evidence

Diagnostic-accuracy evidenceNo eligible DTA study identified
More evidence and citation details
Full name
Terminal Delirium-Related Distress Scale
Evidence summary
psychometric-development-and-validation
Source-study sample
n = 281
Citation
Uchida M, Akechi T, Morita T, Shima Y, Igarashi N, Miyashita M; J-HOPE group Development and validation of the Terminal Delirium-Related Distress Scale to assess irreversible terminal delirium Palliative & Supportive Care. 2021;19(3):287-293. PMID 33397541
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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.