Table 3.
The accuracy, over-staging, and under-staging rates of EUS for diagnosing EGC invasion depth and univariate analysis of risk factors affecting the diagnostic performance of EUS.
| Lesion characteristics | Accuracy | P-value | Over-staging | P-value | Under-staging | P-value |
|---|---|---|---|---|---|---|
| Location | 0.001 | <0.001 | 0.653 | |||
| Cardia/fundus | 69.4% | 19.4% | 11.1% | |||
| Body | 40.0% | 53.3% | 6.7% | |||
| Angle | 34.4% | 50.0% | 15.6% | |||
| Antrum | 65.3% | 24.5% | 10.2% | |||
| Tumor diameter* | 0.025 | 0.087 | 0.324 | |||
| ≤ 2.0 cm | 63.3% | 28.6% | 8.2% | |||
| >2.0 cm | 47.6% | 40.0% | 12.4% | |||
| Macroscopic type | <0.001 | <0.001 | 0.137 | |||
| 0–I | 77.8% | 11.1% | 11.1% | |||
| 0–II | 63.9% | 23.4% | 12.7% | |||
| 0–III | 22.7% | 75.0% | 2.3% | |||
| Ulcer/Scar | <0.001 | <0.001 | 0.632 | |||
| Positive | 31.6% | 59.6% | 8.8% | |||
| Negative | 64.9% | 24.0% | 11.0% | |||
| Surface roughness | 0.597 | 0.646 | 0.882 | |||
| Positive | 55.5% | 34.0% | 9.1% | |||
| Negative | 63.6% | 27.3% | 10.5% | |||
| White fur | 0.002 | <0.001 | 0.109 | |||
| Negative | 65.4% | 24.4% | 10.2% | |||
| Mediate | 37.0% | 58.7% | 4.3% | |||
| Much | 47.4% | 34.2% | 18.4% | |||
| Pathologic depth | <0.001 | 0.965 | <0.001 | |||
| M | 66.4% | 33.6% | 0 | |||
| SM | 30.6% | 33.9% | 35.5% | |||
| Histology | <0.001 | <0.001 | 0.241 | |||
| Differentiated | 64.0% | 24.2% | 11.8% | |||
| Undifferentiated | 30.0% | 64.0% | 6.0% | |||
| EUS type | 0.632 | 0.775 | 0.223 | |||
| US-probe | 55.0% | 33.1% | 11.9% | |||
| US-endoscope | 58.8% | 35.5% | 5.9% |
*
Missing data in 8 patients (3.8%).
EUS, endoscopic ultrasonography; EGC, early gastric cancer; M, mucosa; SM, submucosa.