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Reliability and Validity of the Persian Version of Intensive Care Delirium Screening Checklist in Detection of Delirium in Intensive Care Units



Torshizi M1 ; Hekmatpou D1 ; Sharbafchi MR2 ; Afshar H2 ; Ayati MM3
Authors
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Authors Affiliations
  1. 1. Department of Nursing and Midwifery, School of Nursing and Midwifery, Arak University of Medical Sciences, Arak, Iran
  2. 2. Psychosomatic Research Center and Department of Psychiatry, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Department of Clinical Psychology, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran

Source: Journal of Isfahan Medical School Published:2016

Abstract

Background: Delirium is a dangerous neuro-psychiatric syndrome. Intensive Care Delirium Screening Checklist (ICDSC) is a suitable tool for diagnosis of this disease. This tool has not been translated and validated into Persian language until now. The goal of this study was to determine the reliability and validity of Persian version of this tool in detection of delirium in intensive care units (ICU). Methods: This study is a psychometric study of the Persian version. All samples were selected from hospitalized patients in ICU and nurses in Al-Zahra hospital, Isfahan, Iran, in 2015. In each case, after 30 minutes of making diagnoses based on Diagnostic and Statistical Manual of Mental Disorders-Forth Version-Text Revision (DSM-IV-TR) criteria by a psychiatrist, a nurse makes her diagnoses by using ICDSC without knowing the psychiatrist’ idea. Then all cases of delirium diagnosis according to the tool were compared with delirium diagnosis by psychiatrist and psychometric properties of tool were assessed. Findings: After doing forward and backward translation, the face validity was confirmed. The mean of content validity index (CVI) in relevancy, clarity and simplicity were 0.83, 0.81, and 0.86 respectively. The construct validity based on factor analysis outputs were above 0.5 for all items. In criterion validity measurement, the cut point of five for Persian version of ICDSC is founded. In this cut point the sensitivity and specificity of the tool was calculated 80% and 93%, respectively. The positive predictive value and negative predictive value in this cut off was calculated 92% and 88%, respectively. The correlation between an equivalent criteria with this tool for delirium screening was 0.74 (P = 0.001). Internal Consistency for the tool based on Cronbach’s alpha was 0.83 and the correlation between two split half of the tool for delirium screening was 0.72. Conclusion: The Persian version of ICDSC has a high validity and reliability for delirium screening. This tool in cut point of five can differentiate delirium from normal case with high positive and negative predictive value. © 2016, Isfahan University of Medical Sciences(IUMS). All rights reserved.
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