TDDS-SF: Terminal Delirium-Related Distress Scale - Short Form

2025

A 15-item, four-domain short form of TDDS for bereaved-family evaluation of irreversible terminal delirium. It reduces respondent burden but is not a delirium screen.

Classification

Experience and impactDetailed phenomenological and/or neuropsychological assessment

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Tool and original sources

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

Original paper

Principal sourceUchida M, Akechi T, Morita T, Masukawa K, Kizawa Y, Tsuneto S, et al. Development and validation of the Terminal Delirium-Related Distress Scale - Shortform. Palliative & supportive care. 2025;23:e78. doi: 10.1017/S1478951525000227. PMID: 40083310.
This paper reports the development and initial validation of TDDS-SF. It is the main source for the method, its intended use and the evidence available at publication.
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Article PDF: CC BY. This licence applies to the article PDF and does not grant rights to reproduce the tool.

No eligible DTA study identifiedRelated context

At a glance

Purpose: Experience and impact
Population: Bereaved relatives of adults with cancer who experienced irreversible terminal delirium
Setting: Palliative care
Time: short self-completed retrospective questionnaire; formal completion time not reported
Items: 15
Score or threshold: None for delirium detection or diagnosis

Evidence

Evidence maturityNo eligible DTA study identified

More evidence and citation details

Full name: Terminal Delirium-Related Distress Scale - Short Form
Related profiles: TDDS
Evidence summary: psychometric-development-and-validation
Source-study sample: n = 366
Citation: Uchida M, Akechi T, Morita T, Masukawa K, Kizawa Y, Tsuneto S, Miyashita M Development and validation of the Terminal Delirium-Related Distress Scale - Shortform Palliative & Supportive Care. 2025;23:e78. PMID 40083310

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Information checked: 2026-07-19

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Sources checked 2026-07-29. How profiles are prepared.