Table 1.
Clinicopathological feature.
| Variables | Learning Set (2011–2015) | Validation Set (2016–2017) |
|---|---|---|
| n = 91 | n = 49 | |
| Age, median (years) * | 66 (41–86) | 66 (35–84) |
| Sex (male/female) | 59/32 | 28/21 |
| Location (colon/rectum) | 54/37 | 32/17 |
| Greatest diameter, median (mm) | 20 (0–50) | 20 (6–66) |
| Preoperative CEA (≥5/5</NA) (ng/mL) | 12/78/1 | 11/36/2 |
| Preoperative CA19-9 (≥38/38</NA) (ng/mL) | 5/85/1 | 3/44/2 |
| Degree of differentiation (tub1/tub2/others) | 57/30/4 | 29/19/1 |
| Depth of invasion, median (µm) * | 2000 (0–9000) | 2200 (91–12,000) |
| Lymph node metastasis (+/−) | 7/84 | 7/42 |
| Lymphatic invasion (+/−) | 24/67 | 16/33 |
| Vascular invasion (+/−) | 12/79 | 7/42 |
| Budding grade (1/2, 3/NA) | 54/16/21 | 37/8/4 |
* Continuous variables were evaluated. CEA, Carcinoembryonic antigen; CA19-9, Carbohydrate antigen 19-9; tub, Tubular adenocarcinoma; NA, Not applicable.