Test | Predicted difficult intubation | Difficult case detected | Sensitity (%) | Specificity (%) | Positive predictive value | Significance p < 0.05 |
Sternomental distance (cm) | 22 | 8 | 87.5 | 81.7 | 31.8 | 0.00001 |
Thyromental distance (cm) | 32 | 5 | 62.5 | 67.1 | 15.6 | 0.09533 |
Mallampatti score | 49 | 5 | 62.5 | 46.3 | 10.2 | 0.63173 |
Protrusion of mandible (A-C) | 17 | 2 | 25 | 81.7 | 11.8 | 0.64363 |
Interincisal gap | 49 | 4 | 50 | 45.1 | 8.2 | 0.79144 |