Table 5.

Comparison of different airway predictors

Criteria	Airway predictors
Sensitivity	TMD>TMHT=RHTMD>SMD>Dentition>MMT>NM>ULBT>MO
Specificity	MO>NM>ULBT>Dentition>MMT>TMHT>TMD>SMD>RHTMD
PPV	ULBT>NM>Dentition>TMHT>TMD>MO>MMT>SMD>RHTMD
NPV	TMD>TMHT>SMD>RHTMD>Dentition>NM>MMT>ULBT>MO
Accuracy	ULBT>NM>TMHT>Dentition=TMD>MO>MMT>SMD>RHTMD
Odds Ratio	ULBT>TMD>TMHT>SMD>NM>Dentition>RHTMD>MMT>MO
Likelihood Ratio	NM>Dentition>TMHT>ULBT>TMD>MO>SMD>MMT>RHTMD
Relative Risk	TMD>TMHT>ULBT>SMD>NM>RHTMD>Dentition>MMT>MO

MMT-Modified Mallampati Test; TMD-Thyromental Distance; SMD-Sternomental Distance; NM-Neck Movement; MO-Mouth Opening; ULBT-Upper Lip Bite Test; RHTMD-Ratio of Height to Thyromental Distance; TMHT-Thyromental Height Test; PPV-Positive Predictive Value; NPV-Negative Predictive Value