Psychiatry Investig.  2022 Sep;19(9):748-753. 10.30773/pi.2022.0151.

Validation of the Korean Version of the Delirium Diagnostic Tool-Provisional (K-DDT-Pro)

Affiliations
  • 1Department of Psychiatry, Chungnam National University Hospital, Daejeon, Republic of Korea
  • 2Department of Cardiovascular & Thoracic Surgery, Chungnam National University Hospital, Daejeon, Republic of Korea
  • 3Institute of Human Behavioral Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea
  • 4Department of Psychiatry, Chungnam National University College of Medicine, Daejeon, Republic of Korea

Abstract


Objective
The Delirium Diagnostic Tool-Provisional (DDT-Pro) was designed to detect the presence and severity of delirium briefly and objectively regardless of psychiatric expertise. We translated the DDT-Pro into Korean and validated it in elderly Korean patients.
Methods
To validate the translation and evaluate inter-rater reliability, a psychiatric trainee and a research nurse independently assessed the same patients referred to the Department of Psychiatry. The results were compared with the reference evaluations performed by a psychiatrist using the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5).
Results
We enrolled 42 elderly patients. The Cronbach’s alpha coefficient were 0.839 (the trainee), 0.822 (the nurse). The Cohen’s weighted κ between the trainee and nurse, ranged from 0.555±0.102 to 0.776±0.062. The Pearson correlation coefficients (Korean version of the DDT-Pro [K-DDT-Pro] and Korean version of the Delirium Rating Scale-Revised-98 [DRS-R98-K] total score) were γ=-0.850 (the trainee), and γ=-0.821 (the nurse). The areas under the ROC curves (AUCs) were 0.974 (the trainee) and 0.893 (the nurse).
Conclusion
The K-DDT-Pro exhibited high internal consistency and relatively substantial inter-rater reliability. The correlation with the DRS-R98-K was strongly negative. The accuracy of the K-DDT-Pro was excellent, regardless of expertise. In conclusion, the K-DDT-Pro is a brief and simple tool that usefully screens for delirium in elderly patients.

Keyword

K-DDT-Pro; Delirium; Reliability; Validity
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