title: Validity and reliability of the Thai version of the Confusion Assessment Method for the Intensive Care Unit (CAM-ICU).
abstract: OBJECTIVE
  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.
  
  
  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).
  
  
  CONCLUSIONS
  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.
authors.affiliation: Department of Anesthesiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Tanyong
authors.initials: T
authors.lastname: Pipanmekaporn
authors.affiliation: Department of Psychiatry, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Nahathai
authors.initials: N
authors.lastname: Wongpakaran
authors.affiliation: Division of Surgical Critical Care and Trauma, Department of Surgery, Chiang Mai University Hospital, Chiang Mai, Thailand.
authors.forename: Sirirat
authors.initials: S
authors.lastname: Mueankwan
authors.affiliation: Department of Psychiatry, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Piyawat
authors.initials: P
authors.lastname: Dendumrongkul
authors.affiliation: Division of Surgical Critical Care and Trauma, Department of Surgery, Chiang Mai University Hospital, Chiang Mai, Thailand.
authors.forename: Kaweesak
authors.initials: K
authors.lastname: Chittawatanarat
authors.affiliation: Division of Surgical Critical Care and Trauma, Department of Surgery, Chiang Mai University Hospital, Chiang Mai, Thailand.
authors.forename: Nantiya
authors.initials: N
authors.lastname: Khongpheng
authors.affiliation: Division of Surgical Critical Care and Trauma, Department of Surgery, Chiang Mai University Hospital, Chiang Mai, Thailand.
authors.forename: Nongnut
authors.initials: N
authors.lastname: Duangsoy
mesh_terms: D003221:Confusion / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D003430:Cross-Sectional Studies; D003693:Delirium / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology; D006801:Humans; D007362:Intensive Care Units / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013785:Thailand / Q000453:epidemiology
keywords: Confusion Assessment Method for the intensive care unit; delirium; reliability; surgical intensive care unit; validity