Diagnostic Efficacy and Clinical Value of Ultrasonography in Difficult Airway Assessment: Based on a Prospective Cohort Study

Table 4

Comparison of the accuracy of ultrasonic indexes in predicting difficult laryngoscope exposure.

Measurement index	Exact number of cases	Inaccurate number of cases	Accuracy rate	χ ^2
DSE	147	53	73.5	—	—
DSH	106	94	53.0	18.080	˂0.05
DSV	128	72	64.0	4.201	˂0.05
HMD	120	80	60.0	8.212	˂0.05
Tongue width	120	80	60.0	8.212	˂0.05
Tongue thickness	139	61	69.5	0.785	>0.05

Note: compared with DSE, .