3.4 Performance of the bipolar voltage amplitudes at the roof
and floor lines, LAPW thickness, and modified AI for prediction of acute
LAPW reconnection
The ROC curve drawn for LA roof line length showed the best cutoff value
(AUC: 0.752) for predicting presence of a gap in the roof line to be ≥
43.4 mm, with a sensitivity of 50% and specificity of 95%. The ROC
curve drawn for bipolar voltage showed the best cutoff value (AUC:
0.787) for predicting a gap resulting from the initial attempt at the
LAPWI to be ≥ 2.64 mV (sensitivity: 69%; specificity: 83%), and the
curve drawn for LAPW thickness (AUC: 0.858) showed the best cutoff value
to be ≥ 2.04 mm (sensitivity: 65%; specificity: 93%) (Figure 6). For
the modified AI, the best cutoff value (AUC: 0.783) for predicting
presence of a gap was ≤ 199 AU/mV (sensitivity: 81%; specificity:
70%).