Table 4 Predictive values for the Upper lip bite test (ULBT) and the modified Mallampati test (MMT) to predict the occurrence of a grade 3 or 4 according to the Cormack-Lehane grade
Outcome of calculations | ULBT (n = 344) | MMT (n = 344) |
|---|---|---|
True-Positive | 4 | 60 |
False-Positive | 5 | 99 |
True-Negative | 250 (74.63%) | 156 (84.32%) |
False-Negative | 85 (25.37%) | 29 (15.68%) |
Accuracy (%) | 73.83 | 62.80 |
Sensitivity (%) | 4.49 | 67.42 |
Specificity (%) | 98.04 | 61.18 |
Positive prediction value (%) | 44.44 | 37.74 |
Negative Prediction value (%) | 74.63 | 84.32 |
AUC of ROC-curve | 0.513 | 0.643 |