Fig. 5.

ROC analysis of nICP diagnostic test. The blue dot indicates the optimal cutoff for the prediction of increased LPP > 20 cmH 2 O. The cutoff is nICP = 19.99 cmH 2 O with both the sensitivity and specificity = 0.92. The area under the ROC curve is 0.95. The area under the dotted line is 0.5. It represents a completely unsuitable test with either sensitivity or specificity < = 0.5. ROC: receiver operating characteristic.