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Validity and reliability of the Thai version of the Confusion Assessment Method for the Intensive Care Unit (CAM-ICU)

Authors Pipanmekaporn T, Wongpakaran N, Mueankwan S, Dendumrongkul P, Chittawatanarat K, Khongpheng N, Duangsoy N

Received 18 February 2014

Accepted for publication 3 April 2014

Published 29 May 2014 Volume 2014:9 Pages 879—885

DOI https://doi.org/10.2147/CIA.S62660

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Tanyong Pipanmekaporn,1 Nahathai Wongpakaran,2 Sirirat Mueankwan,3 Piyawat Dendumrongkul,2 Kaweesak Chittawatanarat,3 Nantiya Khongpheng,3 Nongnut Duangsoy3

1Department of Anesthesiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; 2Department of Psychiatry, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; 3Division of Surgical Critical Care and Trauma, Department of Surgery, Chiang Mai University Hospital, Chiang Mai, Thailand

Purpose: The purpose of this study was to determine the validity and reliability of the Thai version of the Confusion Assessment Method for the Intensive Care Unit (CAM-ICU), when compared to the diagnoses made by delirium experts.
Patients and methods: This was a cross-sectional study conducted in both surgical intensive care and subintensive care units in Thailand between February–June 2011. Seventy patients aged 60 years or older who had been admitted to the units were enrolled into the study within the first 48 hours of admission. Each patient was randomly assessed as to whether they had delirium by a nurse using the Thai version of the CAM-ICU algorithm (Thai CAM-ICU) or by a delirium expert using the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision.
Results: The prevalence of delirium was found to be 18.6% (n=13) by the delirium experts. The sensitivity of the Thai CAM-ICU’s algorithms was found to be 92.3% (95% confidence interval [CI] =64.0%-99.8%), while the specificity was 94.7% (95% CI =85.4%-98.9%). The instrument displayed good interrater reliability (Cohen’s κ=0.81; 95% CI =0.64-0.99). The
time taken to complete the Thai CAM-ICU was 1 minute (interquatile range, 1-2 minutes).
Conclusion: The Thai CAM-ICU demonstrated good validity, reliability, and ease of use when diagnosing delirium in a surgical intensive care unit setting. The use of this diagnostic tool should be encouraged for daily, routine use, so as to promote the early detection of delirium and its rapid treatment.

Keywords: delirium, surgical intensive care unit, Confusion Assessment Method for the ­intensive care unit, validity, reliability

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