Table 1.
Clinical characteristics of patients with bone metastasis of gastric cancer in train set and test set.
| Group | Overall | Train Set | Test Set | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mets_bone | No | Yes | P-value | No | Yes | P-value | No | Yes | P-value |
| N | N=22181 | N=975 | N=15544 | N=668 | N=6637 | N=307 | |||
| Age | 65.3 (12.6) | 62.0 (13.2) | <0.001 | 65.3 (12.6) | 62.0 (13.1) | <0.001 | 65.2 (12.6) | 61.9 (13.5) | <0.001 |
| Sex: | 0.006 | 0.017 | 0.202 | ||||||
| Male | 14114 (63.6%) | 663 (68.0%) | 9799 (63.0%) | 452 (67.7%) | 4315 (65.0%) | 211 (68.7%) | |||
| Female | 8067 (36.4%) | 312 (32.0%) | 5745 (37.0%) | 216 (32.3%) | 2322 (35.0%) | 96 (31.3%) | |||
| Race: | 0.002 | 0.03 | 0.012 | ||||||
| White | 15896 (71.7%) | 739 (75.8%) | 11104 (71.4%) | 494 (74.0%) | 4792 (72.2%) | 245 (79.8%) | |||
| Black | 2884 (13.0%) | 90 (9.23%) | 2032 (13.1%) | 64 (9.58%) | 852 (12.8%) | 26 (8.47%) | |||
| Other | 3401 (15.3%) | 146 (15.0%) | 2408 (15.5%) | 110 (16.5%) | 993 (15.0%) | 36 (11.7%) | |||
| Marital_status: | 0.382 | 0.474 | 0.641 | ||||||
| No | 8484 (38.2%) | 387 (39.7%) | 6010 (38.7%) | 268 (40.1%) | 2474 (37.3%) | 119 (38.8%) | |||
| Yes | 13697 (61.8%) | 588 (60.3%) | 9534 (61.3%) | 400 (59.9%) | 4163 (62.7%) | 188 (61.2%) | |||
| Site: | <0.001 | <0.001 | <0.001 | ||||||
| Other | 11094 (50.0%) | 485 (49.7%) | 7762 (49.9%) | 331 (49.6%) | 3332 (50.2%) | 154 (50.2%) | |||
| Cardia | 7183 (32.4%) | 401 (41.1%) | 5058 (32.5%) | 279 (41.8%) | 2125 (32.0%) | 122 (39.7%) | |||
| Gastric antrum | 3904 (17.6%) | 89 (9.13%) | 2724 (17.5%) | 58 (8.68%) | 1180 (17.8%) | 31 (10.1%) | |||
| Grade: | <0.001 | <0.001 | <0.001 | ||||||
| I | 2419 (10.9%) | 13 (1.33%) | 1713 (11.0%) | 8 (1.20%) | 706 (10.6%) | 5 (1.63%) | |||
| II | 5920 (26.7%) | 154 (15.8%) | 4148 (26.7%) | 119 (17.8%) | 1772 (26.7%) | 35 (11.4%) | |||
| III | 13275 (59.8%) | 789 (80.9%) | 9303 (59.8%) | 528 (79.0%) | 3972 (59.8%) | 261 (85.0%) | |||
| IV | 567 (2.56%) | 19 (1.95%) | 380 (2.44%) | 13 (1.95%) | 187 (2.82%) | 6 (1.95%) | |||
| AJCC_T: | <0.001 | <0.001 | <0.001 | ||||||
| T1 | 5512 (24.9%) | 187 (19.2%) | 3915 (25.2%) | 128 (19.2%) | 1597 (24.1%) | 59 (19.2%) | |||
| T2 | 2642 (11.9%) | 39 (4.00%) | 1831 (11.8%) | 27 (4.04%) | 811 (12.2%) | 12 (3.91%) | |||
| T3 | 6074 (27.4%) | 136 (13.9%) | 4227 (27.2%) | 100 (15.0%) | 1847 (27.8%) | 36 (11.7%) | |||
| T4 | 7953 (35.9%) | 613 (62.9%) | 5571 (35.8%) | 413 (61.8%) | 2382 (35.9%) | 200 (65.1%) | |||
| AJCC_N: | <0.001 | <0.001 | 0.001 | ||||||
| N1 | 16505 (74.4%) | 725 (74.4%) | 11581 (74.5%) | 496 (74.3%) | 4924 (74.2%) | 229 (74.6%) | |||
| N2 | 2124 (9.58%) | 48 (4.92%) | 1498 (9.64%) | 36 (5.39%) | 626 (9.43%) | 12 (3.91%) | |||
| N3 | 3552 (16.0%) | 202 (20.7%) | 2465 (15.9%) | 136 (20.4%) | 1087 (16.4%) | 66 (21.5%) | |||
| Mets_brain: | <0.001 | <0.001 | <0.001 | ||||||
| No | 22078 (99.5%) | 938 (96.2%) | 15478 (99.6%) | 640 (95.8%) | 6600 (99.4%) | 298 (97.1%) | |||
| Yes | 103 (0.46%) | 37 (3.79%) | 66 (0.42%) | 28 (4.19%) | 37 (0.56%) | 9 (2.93%) | |||
| Mets_liver: | <0.001 | <0.001 | <0.001 | ||||||
| No | 19162 (86.4%) | 622 (63.8%) | 13428 (86.4%) | 434 (65.0%) | 5734 (86.4%) | 188 (61.2%) | |||
| Yes | 3019 (13.6%) | 353 (36.2%) | 2116 (13.6%) | 234 (35.0%) | 903 (13.6%) | 119 (38.8%) | |||
| Mets_lung: | <0.001 | <0.001 | <0.001 | ||||||
| No | 21305 (96.1%) | 737 (75.6%) | 14943 (96.1%) | 508 (76.0%) | 6362 (95.9%) | 229 (74.6%) | |||
| Yes | 876 (3.95%) | 238 (24.4%) | 601 (3.87%) | 160 (24.0%) | 275 (4.14%) | 78 (25.4%) | |||