| | Variables | Accuracy of pathological diagnosis (correct/total) | value |
| | Sex | | 0.510 | | Male | 9/15 (60.0%) | | | Female | 9/19 (47.3%) | | | Age (years) | | 0.510 | | ≤60 | 9/15 (60.0%) | | | >60 | 9/19 (47.3%) | | | Clinically determined tumor diameter (mm) | | 1.000 | | ≤30 | 7/14 (50.0%) | | | >30 | 11/20 (55.0%) | | | Ulceration | | 0.327 | | Present | 10/16 (62.5%) | | | Absent | 8/18 (44.4%) | | | Number of endoscopy | | 1.000 | | First | 8/16 (50.0%) | | | Second or later | 10/18 (55.6%) | | | Endoscopic ultrasound | | 0.001** | | Yes | 11/12 (91.7%) | | | No | 7/22 (31.8%) | | | Number of biopsy | | 0.274 | | First | 14/23 (60.9%) | | | Second or later | 4/11 (36.4%) | | | Biopsy procedure | | 0.005** | | Normal | 7/21 (33.3%) | | | Fine-needle aspiration biopsy | 11/13 (84.6%) | |
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