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| Characteristics | Area | Threshold value (mm) | p value | Sen (%) | Spe (%) | 95% CI |
|---|---|---|---|---|---|---|
| Neck width | 0.566 | 4.35 | 0.097 | 67.4 | 40 | 0.490-0.642 |
| Aspect ratio | 0.781 | 1.18 | 0.000 | 70.5 | 74.4 | 0.719-0.844 |
| LA ratio | 0.622 | 1.50 | 0.002 | 73.6 | 48.9 | 0.543-0.711 |
CI, confidence interval; LA ratio, lateral angle ratio.
