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Validation and psychometric properties of the German version of the delirium motor subtype scale (DMSS)


Garcia Nuñez, David; Boettger, Soenke; Meyer, Rafael; Richter, Andre; Schubert, Maria; Meagher, David; Jenewein, Josef (2017). Validation and psychometric properties of the German version of the delirium motor subtype scale (DMSS). Assessment:online.

Abstract

OBJECTIVE: Delirium has been characterized into its subtypes-hypoactive, hyperactive, mixed, or no motor subtype-along with the use of the Delirium Motor Symptom Scale (DMSS). The German version of this scale (DMSS-G), however, has not yet been validated.
METHOD: We determined internal consistency, reliability, and validity of the DMSS-G in the surgical intensive care unit, using DSM-IV-TR criteria and the Delirium Rating Scale-Revised-98.
RESULTS: In total, 289 patients were included, and out of these, 122 were delirious. The DMSS-G showed excellent internal consistency (Cronbach's α = 0.92) and interrater reliability (Fleiss κ = 0.83). Additionally, the overall concurrent validity was substantial (Cramer's V = 0.69); within subtypes, hyperactive, hypoactive, or mixed, the concurrent validity remained at least substantial (Cohen's κ = 0.73-0.82) and the sensitivity ranged from 60% to 97%. In contrast, in those with no motor subtype, we found the concurrent validity (Cohen's κ = 0.31) and sensitivity to be low (22%). Overall, specificity for all individual subtypes was high (82% to 100%). The DMSS was very sensitive in both rating hyperactive and hypoactive motor symptoms of delirium.
CONCLUSION: The DMSS-G is a highly reliable and valid instrument for detecting motor symptoms in delirium, which provides an accurate instrument to classify the motor subtypes of delirium.

Abstract

OBJECTIVE: Delirium has been characterized into its subtypes-hypoactive, hyperactive, mixed, or no motor subtype-along with the use of the Delirium Motor Symptom Scale (DMSS). The German version of this scale (DMSS-G), however, has not yet been validated.
METHOD: We determined internal consistency, reliability, and validity of the DMSS-G in the surgical intensive care unit, using DSM-IV-TR criteria and the Delirium Rating Scale-Revised-98.
RESULTS: In total, 289 patients were included, and out of these, 122 were delirious. The DMSS-G showed excellent internal consistency (Cronbach's α = 0.92) and interrater reliability (Fleiss κ = 0.83). Additionally, the overall concurrent validity was substantial (Cramer's V = 0.69); within subtypes, hyperactive, hypoactive, or mixed, the concurrent validity remained at least substantial (Cohen's κ = 0.73-0.82) and the sensitivity ranged from 60% to 97%. In contrast, in those with no motor subtype, we found the concurrent validity (Cohen's κ = 0.31) and sensitivity to be low (22%). Overall, specificity for all individual subtypes was high (82% to 100%). The DMSS was very sensitive in both rating hyperactive and hypoactive motor symptoms of delirium.
CONCLUSION: The DMSS-G is a highly reliable and valid instrument for detecting motor symptoms in delirium, which provides an accurate instrument to classify the motor subtypes of delirium.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Klinik für Konsiliarpsychiatrie und Psychosomatik
Dewey Decimal Classification:610 Medicine & health
Uncontrolled Keywords:German version, ICU, delirium, intensive care unit, motor subtypes, validation
Language:English
Date:2017
Deposited On:05 Dec 2017 16:46
Last Modified:19 Feb 2018 09:30
Publisher:Sage Publications Ltd.
ISSN:1073-1911
OA Status:Closed
Publisher DOI:https://doi.org/10.1177/1073191117744047

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