Table 3 Comparison of sex, BMI, MMT, DSE and the best model for predicting a difficult laryngoscopy

Sensitivity (95% CI)

0.614 (0.548–0.679)

0.386 (0.321–0.452)

0.750 (0.692–0.808)

0.818 (0.766–0.870)

0.909 (0.870–0.948)

Specificity (95% CI)

0.611(0.545–0.677)

0.731 (0.671–0.790)

0.713 (0.652–0.774)

0.856 (0.809–0.904)

0.904 (0.864–0.944)

PPV (95% CI)

0.294 (0.232–0.355)

0.274 (0.214–0.334)

0.407 (0.341–0.474)

0.600 (0.534–0.666)

0.714 (0.653–0.775)

NPV (95% CI)

0.857 (0.810–0.904)

0.819 (0.767–0.871)

0.915 (0.878–0.953)

0.947 (0.917–0.977)

0.974 (0.953–0.996)

Kappa

0.160 (0.043–0.278)

0.819 (0.767–0.871)

0.353 (0.230–0.476)

0.595 (0.463–0.727)

0.739 (0.606–0.873)

Youden

0.224

0.117

0.463

0.6745

0.8132

OR (95% CI)

2.492 (1.258–4.937)

1.707 (0.849–3.431)

7.437 (3.471–15.936)

26.813 (11.102–64.756)