Table 4.
Sensitivity, specificity, positive predictive values, and negative predictive values for airway parameters against difficult intubation among surgical patients in Tikur Anbessa Hospital from February 1 to March 30, 2016.
| Parameters | Sn (%) | Sp (%) | PPV (%) | NPV (%) | Area | p value | 95% CI | Accuracy (%) |
|---|---|---|---|---|---|---|---|---|
| IID | 66.7 | 79.1 | 14.3 | 97.3 | 0.271 | 0.008 | 0.112–0.430 | 27.1 |
| MP | 41.7 | 73 | 7.4 | 96 | 0.574 | 0.391 | 0.401–0.746 | 57.4 |
| MMC | 58.3 | 90.9 | 25 | 97.6 | 0.746 | 0.004 | 0.574–0.918 | 74.6 |
| TMD | 58.3 | 82.2 | 14.6 | 97.4 | 0.297 | 0.018 | 0.129–0.466 | 29.7 |
| SMD | 8.3 | 84.8 | 27.7 | 94.6 | 0.534 | 0.688 | 0.375–0.694 | 53.4 |
| CL | 83.3 | 90 | 30.3 | 99 | 0.867 | 0.000 | 0.742–0.991 | 86.7 |
Sn = sensitivity; Sp = specificity; PPV = positive predictive value; NPV = negative predictive value; CI = confidence interval; p < 0.05.