Table 2.
Performance of the variables for recovery of awareness
| Variable | Reference | Sensitivity | Specificity | PPV | NPV | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ratio | % | 95% CI | Ratio | % | 95% CI | Ratio | % | 95% CI | Ratio | % | 95% CI | ||
| Type of BI | Trauma | 15/23 | 65.2 | 42.8 to 82.8 | 24/33 | 72.7 | 54.2 to 86.1 | 15/24 | 62.5 | 40.8 to 80.4 | 24/32 | 75.0 | 56.2 to 87.9 |
| Motor response | Flexor | 21/38 | 55.3 | 38.5 to 71.0 | 15/18 | 83.3 | 57.7 to 95.6 | 21/24 | 87.5 | 66.5 to 96.7 | 15/32 | 46.9 | 29.5 to 45.0 |
| EEG reactivity | Present | 16/24 | 66.7 | 44.7 to 83.6 | 24/32 | 75.0 | 56.2 to 87.9 | 16/24 | 66.7 | 44.7 to 83.6 | 24/32 | 75.0 | 56.2 to 87.9 |
| Sleep spindles | Present | 17/24 | 70.8 | 48.8 to 86.6 | 25/32 | 78.1 | 59.6 to 90.1 | 17/24 | 70.8 | 48.8 to 86.6 | 25/32 | 78.1 | 59.6 to 90.1 |
| N20 | Present | 15/23 | 65.2 | 42.8 to 82.8 | 24/33 | 72.7 | 54.2 to 86.1 | 15/24 | 62.5 | 40.8 to 80.4 | 24/32 | 75.0 | 52.2 to 87.9 |
BI, brain injury; CI, confidence interval; EEG, electroencephalogram; NPV, negative predictive value; PPV, positive predictive value.