Table 1.
Patient, clinical and operative characteristics. Continuous variables are mean ± standard deviation, categorical variables are n (%)
| All (n = 168) | Benign (n = 102) | Malignant (n = 66) | P value | |
|---|---|---|---|---|
| Age | 68 ± 13 | 66 ± 13 | 71 ± 11 | 0.043 |
| Male sex | 101 (60.1%) | 59 (57.8%) | 42 (63.6%) | 0.454 |
| BMI, kg/m2 | 27 ± 3 | 27 ± 3 | 27 ± 3 | 0.488 |
| ASA | 0.004 | |||
| I | 27 (16.1%) | 23 (22.5%) | 4 (6.1%) | |
| II | 78 (46.4%) | 50 (49.0%) | 28 (42.4%) | |
| III | 62 (36.9%) | 29 (28.4%) | 33 (50.0%) | |
| Pre-TAMIS polypectomy | 33 (19.6%) | 15 (14.7%) | 18 (27.3%) | 0.045 |
| Size (mm) | 48 ± 23 | 52 ± 23 | 41 ± 22 | 0.005 |
| Distance to anal verge (cm) | 6 ± 4 | 6 ± 4 | 6 ± 4 | 0.752 |
| Final pathology | ||||
| Benign | 102 (60.7%) | |||
| Adenoma n | 100 (59.5%) | |||
| Other n | 2 (1.2%) | |||
| Malignant | 66 (39.3%) | |||
| Adenocarcinoma n | 59 (35.1%) | |||
| ypT0 | 4 (2.4%) | |||
| ypT1 | 3 (1.8%) | |||
| ypT2 | 1 (0.6%) | |||
| pT1 | 38 (22.6%) | |||
| pT2 | 13 (7.7%) | |||
| Carcinoid | 6 (3.6%) | |||
| Maltoma | 1 (0.6%) | |||
| Negative margin (R0) | 160 (95.2%) | 97 (95.1%) | 63 (95.5%) | 0.916 |
| Resection depth | 0.496 | |||
| Full thickness | 133 (79.2%) | 79 (77.5%) | 54 (81.8%) | |
| Submucosal | 35 (20.8%) | 23 (22.5%) | 12 (18.2%) | |
| Tumour fragmentation | 6 (3.6%) | 4 (3.9%) | 2 (3.1%) | 0.775 |
| Defect closure | 161 (95.8%) | 97 (95.1%) | 64 (97.0%) | 0.553 |