Table 4.
Diagnostic accuracy and AUROC for airway tests predicting C&L grade III or IV assessed without BURP
| Prediction Test | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Accuracy (%) | Likelihood Ratio (+) | AUROC |
|---|---|---|---|---|---|---|---|
| TMH test ≤50 mm | 49.3 (37.4-61.3)a | 70.5 (66.5-74.4)a | 18.6 (13.3-24.8)a | 91.1 (87.9-93.6)a | 68.0 | 1.673 | 0.631 (0.56-0.70)a |
| TMH test ≤54 mm | 65.8 (53.7-76.5)a | 55.6 (51.3-59.9)a | 16.8 (12.6-21.6)a | 92.3 (88.8-94.9)a | 56.8 | 1.481 | |
| TMD test ≤65 mm | 6.8 (2.3-15.3)a | 95.7 (93.6-97.3)a | 17.9 (6.1-36.9)a | 88.3 (85.4-90.8)a | 85.1 | 1.596 | 0.636 (0.57-0.70)a |
| MMT class III, IV | 37.0 (26.0-49.1)a | 89.7 (86.9-92.2)a | 32.9 (22.9-44.2)a | 91.3 (88.5-93.5)a | 83.4 | 3.604 | 0.708 (0.65-0.77)a |
AUROC – Area under the receiver-operating characteristic curve; BURP – External, backward, upward, rightward pressure; C&L – Cormack Lehane; MMT – Modified Mallampati test; NPV – Negative predictive value; Likelihood ratio (+) – Positive likelihood ratio; PPV – Positive predictive value; TMD – Thyromental distance; TMH – Thyromental height a95% confidence intervals