Table 1.
Baseline characteristics of patients
| Variable | All patients (n = 843) |
| Age (yr) | 58 (52-67) |
| Gender | |
| Male | 522 (61.9) |
| Female | 321 (38.1) |
| BMI | 25 (22-28) |
| ASA score | 2 (1-3) |
| Lesion size (mm) | 16 (12-23) |
| Number of adenomas | 2.5 (1-3) |
| Number of ACAs | 1.5 (1-2) |
| Morphology1 pedunculated (Paris 1p) | 473 (40.9) |
| Sessile (Paris 1s) | 458 (39.6) |
| Nonpolypoid (Paris 0-IIa, 0-IIb, 0-IIc) | 224 (19.5) |
| Location1 | |
| Right side of the colon | 431 (37.3) |
| Left side of the colon | 724 (62.7) |
| Type of resection1 | 937 (81.1) |
| En bloc piecemeal | 218 (18.9) |
| Histology1 | |
| Tubular | 436 (37.7) |
| Tubulo-villous | 632 (54.7) |
| Villous | 87 (7.6) |
| Hystologic grade of dysplasia1 | |
| Low grade | 878 (76.1) |
| High grade | 277 (23.9) |
1
Percentages computed on the total number of ACAs (n = 1155). Continuous variables are expressed as median (interquartile range) whereas categorical ones as absolute number (percentage). BMI: Body mass index; ASA: American Society of Anaesthesiology; ACA: Advanced colorectal adenoma.