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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 | P |
|---|---|---|---|---|---|
| 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, ∗P < 0.05.
