Table 5.
Univariate analysis of bleeding risk factors n (%)
| Bleeding, n = 30 | No bleeding, n = 278 | P value | |
| Age (yr), mean ± SD | 69.5 ± 10 | 69.1 ± 12 | 0.137 |
| Gender | 0.634 | ||
| Male | 12 (40) | 99 (35.6) | |
| Female | 18 (60) | 179 (64.4) | |
| Anticoagulation1 | 0.217 | ||
| Yes | 14 (46.7) | 98 (35.2) | |
| No | 16 (53.3) | 180 (64.7) | |
| ASA | 0.515 | ||
| I, II | 20 (66.7) | 201 (72.3) | |
| III, IV | 10 (33.3) | 77 (27.7) | |
| Paris classification of polyps1 | |||
| 0-Ip | 17 (56.7) | 135 (48.6) | 0.399 |
| 0-Is | 13 (43.3) | 143 (51.4) | |
| Polyp size1 | < 0.036 | ||
| ≤ 10 mm | 7 (23) | 120 (43.2) | |
| > 10 mm | 23 (77) | 158 (56.8) | |
| Location | 0.557 | ||
| Stomach | 28 (93.3) | 266 (95.7) | |
| Duodenum | 2 (6.7) | 12 (4.3) | |
| Polyp histology1 | 0.092 | ||
| Hyperplastic | 18 (60) | 206 (74.4) | |
| Others | 12 (40) | 72 (25.6) | |
| Polyp with dysplasia | 0.053 | ||
| Yes | 8 (26.7) | 36 (13.4) | |
| No | 22 (73.3) | 232 (86.6) | |
| Physician expertise1 | < 0.026 | ||
| Staff | 30 (100) | 238 (85.6) | |
| Fellow | 0 (0) | 40 (14.4) | |
| University hospital | 0.207 | ||
| Yes | 27 (90) | 224 (80.6) | |
| No | 3 (10) | 54 (19.4) | |
| Number of polyps resected | 0.989 | ||
| One | 20 (66.7) | 185 (66.5) | |
| More than one | 10 (33.3) | 93 (33.4) | |
| Use of endocut1 | 0.068 | ||
| Yes | 27 (90) | 209 (75.2) | |
| No | 3 (10) | 69 (24.8) | |
| Hemorrhage prophylaxis1 | 0.479 | ||
| Yes | 23 (76.7) | 196 (70.5) | |
| No | 7 (23.3) | 82 (29.5) |
1
Clinically relevant variables that have been included in the multivariate analysis.