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Table 2 Performance of the variables for recovery of awareness

From: Development of a simple score to predict outcome for unresponsive wakefulness syndrome

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
  1. BI, brain injury; CI, confidence interval; EEG, electroencephalogram; NPV, negative predictive value; PPV, positive predictive value.