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Table 4 Psychometric properties of the Arabic CAM-ICU according to gender

From: Psychometric properties of the Arabic version of the confusion assessment method for the intensive care unit (CAM-ICU)

Property CAM-ICU by nurse
(n = 56)
CAM-ICU by intensivist
(n = 54)
Male
 Sensitivity (95%CI) 0.71 (0.55–0.86) 0.47 (0.30–0.64)
 Specificity (95%CI) 1.0 (1.0–1.0) 0.95 (0.85–1.0)
 Likelihood Ratio LR+ (95%CI) Undefined* 9.4 (9.3–9.5)
 Likelihood Ratio LR- (95%CI) 0.29 (0.13–0.46) 0.56 (0.40–0.72)
 Positive predicted value (95%CI) 1.0 (1.0–1.0) 0.94 (0.83–1.0)
 Negative predicted value (95%CI) 0.69 (0.53–0.85) 0.51 (0.35–0.67)
 Pre-test probability 0.61 0.63
 Pre-test odds 1.55 1.70
 Post-test odds Undefined** 16
 Post-test probability Undefined*** 0.94
 Delirium prevalence, CAM-ICU vs. psychiatrist clinical assessment 42.9% vs. 60.7% 31.5% vs. 63%
 Accuracy 82.1% 64.8%
Female
 Sensitivity (95%CI) 0.77 (0.62–0.91) 0.65 (0.49–0.81)
 Specificity (95%CI) 0.94 (0.84–1.0) 0.89 (0.74–1.0)
 Likelihood Ratio LR+ (95%CI) 13.8 (13.7–13.8) 5.82 (5.71–5.93)
 Likelihood Ratio LR- (95%CI) 0.25 (0.07–0.43) 0.40 (0.21–0.58)
 Positive predicted value (95%CI) 0.96 (0.89–1.0) 0.92 (0.81–1.0)
 Negative predicted value (95%CI) 0.68 (0.50–0.86) 0.57 (0.39–0.76)
 Pre-test probability 0.65 0.65
 Pre-test odds 1.89 1.89
 Post-test odds 26.0 11
 Post-test probability 0.96 0.92
 Delirium prevalence, CAM-ICU vs. psychiatrist clinical assessment 51.9% vs. 65.4% 46.2% vs. 65.4%
 Accuracy 82.7% 73.1%
  1. CAM-ICU Confusion Assessment Method for the Intensive Care Unit, CI confidence interval * Specificity value is 1; ** Likelihood Ratio is undefined; *** Post-test odd is undefined