Table 3.
Sensitivity, specificity, positive predictive values, and negative predictive values for preoperative parameters against difficult laryngoscopy among surgical patients in Tikur Anbessa Hospital from February 1 to March 30, 2016.
| Parameter | Sn (%) | Sp (%) | PPV (%) | NPV (%) | Area | p value | 95% CI | Accuracy (%) |
|---|---|---|---|---|---|---|---|---|
| IID | 51.5 | 81.3 | 30.35 | 91.4 | 0.336 | 0.002 | 0.228–0.444 | 33.6 |
| MP | 54.5 | 76.6 | 26.8 | 91.4 | 0.656 | 0.004 | 0.549–0.762 | 65.6 |
| MC | 51.5 | 94.7 | 60.7 | 92.5 | 0.731 | 0.000 | 0.621–0.841 | 73.1 |
| TMD | 51.5 | 85.2 | 35.4 | 91.7 | 0.317 | 0.001 | 0.208–0.425 | 31.7 |
| SMD | 30.3 | 87.6 | 27.7 | 88.8 | 0.411 | 0.099 | 0.298–0.523 | 41.1 |
Sn = sensitivity; Sp = specificity; PPV = positive predictive value; NPV = negative predictive value; CI = confidence interval; p < 0.05.