S2.
Baseline characteristics of all patients analyzed and patients with single origination, multiple originations and IPA absence
| Variables | n (%) | P | |||
| All patients analyzed
(N=419) |
Single origination
(N=398) |
Multiple originations
(N=15) |
IPA absence
(N=6) |
||
| IPA, infra-pyloric artery; IQR, interquartile range; TG, total gastrectomy; DG, distal gastrectomy; OP, open surgery; LA, laparoscopic-assisted surgery; TL, totally laparoscopic surgery; EGJ, esophagogastric junction; U, upper; M, middle; L, lower. | |||||
| Sex | 0.846 | ||||
| Male | 309 (73.7) | 294 (73.9) | 11 (73.3) | 4 (66.7) | |
| Female | 110 (26.3) | 104 (26.1) | 4 (26.7) | 2 (33.3) | |
| Age [median (IQR)] (year) | 62 (55−68) | 62 (55−68) | 66 (58−68) | 64 (42−67) | 0.625 |
| Gastrectomy | 0.817 | ||||
| TG | 168 (40.1) | 159 (39.9) | 7 (46.7) | 2 (33.3) | |
| DG | 251 (59.9) | 239 (60.1) | 8 (53.3) | 4 (66.7) | |
| Surgical approach | 0.120 | ||||
| OP | 90 (21.5) | 89 (22.4) | 0 (0) | 1 (16.7) | |
| LA | 166 (39.6) | 154 (38.7) | 8 (53.3) | 4 (66.7) | |
| TL | 163 (38.9) | 155 (38.9) | 7 (46.7) | 1 (16.7) | |
| Tumor location | 0.198 | ||||
| EGJ | 58 (13.8) | 54 (13.6) | 3 (20.0) | 1 (16.7) | |
| U | 53 (12.6) | 50 (12.6) | 2 (13.3) | 1 (16.7) | |
| M | 94 (22.4) | 90 (22.6) | 4 (26.7) | 0 (0) | |
| L | 211 (50.4) | 202 (50.8) | 5 (33.3) | 4 (66.7) | |
| UML | 2 (0.5) | 1 (0.3) | 1 (6.7) | 0 (0) | |
| cT stage | 0.685 | ||||
| cT1 | 45 (10.7) | 42 (10.6) | 2 (13.3) | 1 (16.7) | |
| cT2 | 93 (22.2) | 87 (21.9) | 4 (26.7) | 2 (33.3) | |
| cT3 | 125 (29.8) | 118 (29.9) | 6 (40.0) | 1 (16.7) | |
| cT4 | 153 (36.5) | 148 (37.5) | 3 (20.0) | 2 (33.3) | |
| cN stage | 0.688 | ||||
| cN0 | 149 (35.6) | 139 (37.7) | 7 (53.8) | 3 (50.0) | |
| cN1 | 100 (23.9) | 97 (26.3) | 2 (15.4) | 1 (16.7) | |
| cN2 | 83 (19.8) | 81 (22.0) | 1 (7.7) | 1 (16.7) | |
| cN3 | 56 (13.4) | 52 (14.1) | 3 (23.1) | 1 (16.7) | |
| cM stage | 0.256 | ||||
| cM0 | 405 (96.7) | 385 (96.7) | 15 (100) | 5 (83.3) | |
| cM1 | 14 (3.3) | 13 (3.3) | 0 (0) | 1 (16.7) | |
| Geographic area | 0.328 | ||||
| East China | 210 (50.1) | 201 (50.5) | 7 (46.7) | 2 (33.3) | |
| North China | 72 (17.2) | 69 (17.3) | 1 (6.7) | 2 (33.3) | |
| Northeastern China | 56 (13.4) | 53 (13.3) | 1 (6.7) | 2 (33.3) | |
| South China | 34 (8.1) | 30 (7.5) | 4 (26.7) | 0 (0) | |
| Northwestern China | 27 (6.4) | 25 (6.3) | 2 (13.3) | 0 (0) | |
| Central China | 14 (3.3) | 14 (3.5) | 0 (0) | 0 (0) | |
| Southwestern China | 5 (1.2) | 5 (1.3) | 0 (0) | 0 (0) | |