Table 1 Baseline clinical characteristics of study subjects
Variables | Total enrolled patients (n = 450) | Intramucosal cancer (n = 352) | SM1 cancer (n = 98) | P value |
|---|---|---|---|---|
Age (years) | 62 (20–84) | 61 (20–84) | 63 (30–84) | 0.842 |
Gender (Male), n (%) | 271 (60.2) | 210 (59.7) | 61 (62.2) | 0.644 |
Comorbidity, n (%) | ||||
Hypertension | 130 (28.9) | 91 (25.9) | 39 (39.8) | 0.190 |
Cardiovascular disease | 19 (4.2) | 15 (4.3) | 4 (4.1) | 0.949 |
Diabetes | 50 (11.1) | 39 (11.1) | 11 (11.2) | 0.948 |
Liver cirrhosis | 29 ( 6.4) | 20 (5.7) | 9 (9.2) | 0.329 |
Renal insufficiency | 5 (1.1) | 3 (0.9) | 2 (2.0) | 0.622 |
Use of antiplatelet or anticoagulant | 0.328 | |||
No, n (%) | 400 (88.9) | 317 (90.1) | 84 (85.7) | |
Yes, n (%) | 50 (11.1) | 35 (9.9) | 14 (14.3) | |
Cancer location, n (%) | 0.138 | |||
Rectum | 219 (48.7) | 180 (51.2) | 39 (39.8) | |
Left colon | 108 (24.0) | 80 (22.7) | 28 (28.6) | |
Right colon | 123 (27.3) | 92 (26.1) | 31 (31.6) | |
Tumor size (mm) | 28 (8–102) | 28 (8–102) | 26 (8–53) | 0.911 |
Morphology, n (%) | < 0.001 | |||
LST-granular | 194 (43.1) | 173 (49.1) | 21 (21.4) | |
LST-nongranular | 100 (22.2) | 64 (18.2) | 36 (36.7) | |
Non-LST | 156 (34.7) | 115 (32.7) | 41 (41.8) | |
En bloc resection, n (%) | 0.158 | |||
En bloc | 384 (85.3) | 296 (84.1) | 88 (89.8) | |
Piecemeal | 66 (14.7) | 56 (15.9) | 10 (10.2) | |
Recurrence, n (%) | 6 (1.33) | 4 (1.13) | 2 (2.0) | 0.490 |
Local recurrence | 1 (0.22) | 1 (0.28) | – | |
Regional lymphnode | 2 (0.44) | – | 2 (2.0) | |
Distant metastasis | 2 (0.44) | 2 (0.57) | – | |
Metachronous cancer | 1 (0.22) | 1 (0.28) | – | |
Follow up duration (month) | 53.8 (12–138) | 51.6 (2–138) | 60 (12–122) | 0.332 |