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