Table 1.
Case characteristics n (%)
| Characteristics |
IBL (mL) |
χ2 | P value | ||
| < 200 | 200-400 | > 400 | |||
| IBL (mean ± SD) | 99.3 ± 25.0 | 223.2 ± 41.6 | 484.4 ± 179.9 | ||
| Gender | 4.307 | 0.116 | |||
| Male | 269 (70.2) | 285 (71.6) | 53 (71.8) | ||
| Female | 114 (29.8) | 113 (28.4) | 11 (28.2) | ||
| Age (yr) | 2.488 | 0.288 | |||
| ≤ 65 | 230 (60.1) | 227 (57.0) | 32 (50.0) | ||
| > 65 | 153 (39.9) | 171 (43.0) | 32 (50.0) | ||
| Tumor location | 40.555 | < 0.001 | |||
| Lower 1/3 | 205 (53.5) | 148 (37.2) | 14 (21.9) | ||
| Middle 1/3 | 36 (9.4) | 41 (10.3) | 6 (9.4) | ||
| Upper 1/3 | 98 (25.6) | 164 (41.2) | 34 (53.1) | ||
| 2/3 or more | 44 (11.5) | 45 (11.3) | 10 (15.6) | ||
| Tumor size | 17.677 | < 0.001 | |||
| < 5 cm | 180 (47.0) | 155 (38.9) | 13 (20.3) | ||
| ≥ 5 cm | 203 (53.0) | 243 (61.1) | 51 (79.7) | ||
| Borrmann type | 5.180 | 0.075 | |||
| I/II | 169 (44.1) | 153 (38.4) | 33 (51.6) | ||
| III/IV | 214 (55.9) | 245 (61.6) | 31 (48.4) | ||
| Histology | 0.982 | 0.612 | |||
| Differentiated | 121 (31.6) | 139 (34.9) | 21 (32.8) | ||
| Undifferentiated | 262 (68.4) | 259 (65.1) | 43 (67.2) | ||
| Extranodal metastasis | 1.963 | 0.375 | |||
| Positive | 59 (15.4) | 71 (17.8) | 14 (21.9) | ||
| Negative | 324 (84.6) | 327 (82.2) | 50 (78.1) | ||
| Depth of invasion | 14.719 | 0.023 | |||
| pT1 | 14 (3.7) | 11 (2.8) | 0 (0.0) | ||
| pT2 | 53 (13.8) | 44 (11.1) | 0 (0.0) | ||
| pT3 | 21 (5.5) | 28 (7.0) | 6 (9.4) | ||
| pT4 | 295 (77.0) | 315 (79.1) | 58 (90.6) | ||
| Lymph node metastasis | 15.793 | 0.015 | |||
| pN0 | 173 (45.2) | 146 (36.7) | 19 (29.7) | ||
| pN1 | 56 (14.6) | 82 (20.6) | 9 (14.1) | ||
| pN2 | 85 (22.2) | 87 (21.9) | 15 (23.4) | ||
| pN3 | 69 (18.0) | 83 (20.9) | 21 (32.8) | ||
| TNM stage | 15.313 | 0.004 | |||
| I | 53 (13.8) | 43 (10.8) | 0 (0.0) | ||
| II | 132 (34.5) | 118 (29.6) | 19 (29.7) | ||
| III | 198 (51.7) | 237 (59.5) | 45 (70.3) | ||
| Chemotherapy | 2.036 | 0.361 | |||
| Yes | 104 (27.2) | 119 (29.9) | 14 (21.9) | ||
| No | 279 (72.8) | 279 (70.1) | 50 (78.1) | ||
| Type of gastrectomy | 37.357 | < 0.001 | |||
| Total | 51 (13.3) | 117 (29.4) | 24 (37.5) | ||
| Subtotal | 332 (86.7) | 281 (70.6) | 40 (62.5) | ||
| Combined organ resection | 22.256 | < 0.001 | |||
| Yes | 16 (4.2) | 38 (9.5) | 13 (20.3) | ||
| No | 367 (95.8) | 360 (90.5) | 51 (79.7) | ||
| Extent of lymphadenectomy | 7.230 | 0.027 | |||
| D2 and D2+ | 189 (49.3) | 188 (47.2) | 20 (31.3) | ||
| D1 | 194 (50.7) | 210 (52.8) | 44 (68.8) | ||
| Postoperative complications | 7.500 | 0.024 | |||
| Present | 20 (5.2) | 34 (8.5) | 9 (14.1) | ||
| Absent | 363 (94.8) | 364 (91.5) | 55 (85.9) | ||
IBL: Intraoperative blood loss; TNM: Tumour-node-metastasis.