Table 4 Analysis of risk factors related to immediate bleeding after ESD
|  | Immediate bleeding group (n = 12) | Non-immediate bleeding group (n = 447) | Pvalue |
|---|---|---|---|
Age (year, mean ± SD) | 67.8 ± 9.7 | 71.5 ± 8.8 | 0.142 (NS) |
Gender Man/Woman | 8 (66.7%)/4 (33.3%) | 335 (74.9%)/108 (25.1%) | 0.710 (NS) |
Tumor location | Â | Â | Â |
 U | 0 (0%) | 75 (16.8%) | 0.230 (NS) |
 M | 3 (25.0%) | 176 (39.4%) | 0.382 (NS) |
 L | 9 (75.0%) | 196 (43.8%) |   0.032 |
Macroscopic type | Â | Â | Â |
 Elevated type/Depressed type | 9 (75.0%)/3 (25.0%) | 251 (54.9%)/196 (46.3%) | 0.246 (NS) |
Size of resected specimen | Â | Â | Â |
(mm, mean ± SD) | 58.3 ± 29.5 | 39.9 ± 14.4 |   0.005 |
Tumor size | Â | Â | Â |
(mm, mean ± SD) | 25.3 ± 19.9 | 17.0 ± 10.6 |   0.011 |
Histopathology | Â | Â | Â |
 Adenoma/Carcinoma | 2 (16.7%)/10 (83.3%) | 71 (15.9%)/376 (84.1%) | >0.999 (NS) |
Depth of invasion | Â | Â | Â |
 M/SM | 11 (91.7%)/1 (8.3%) | 412 (92.2%)/35 (7.8%) | >0.999 (NS) |
Ulcerative findings | Â | Â | Â |
 None/present | 12 (100%)/0 (0.0%) | 414 (92.6%)/33 (7.4%) | >0.999 (NS) |
Resected style | Â | Â | Â |
 One-piece/Piecemeal | 12 (100%)/0 (0%) | 434 (97.1%)/13 (2.9%) | >0.999 (NS) |
Heart disease | 3 (25.0%) | 69 (15.4%) | 0.413 (NS) |
Renal disease | 0 (0.0%) | 21 (4.7%) | >0.999 (NS) |
Hepatic disease | 3 (25.0%) | 42 (9.4%) | 0.103 (NS) |
Pulmonary disease | 3 (25.0%) | 33 (7.4%) | 0.060 (NS) |
Brain disease | 3 (25.0%) | 42 (9.4%) | 0.103 (NS) |
Hypertension | 6 (50.0%) | 203 (45.4%) | 0.983 (NS) |
Diabetes mellitus | 1 (8.3%) | 74 (16.6%) | 0.700 (NS) |
Hyperlipidemia | 3 (25.0%) | 64 (14.3%) | 0.396 (NS) |