Table 1.
Baseline characteristics of training group and validation group
| Level | Overall (n = 944) |
Training group (n = 664) |
Validation group (n = 280) |
p | |
|---|---|---|---|---|---|
| Age (mean (SD)) | NA | 55.09 (18.08) | 54.60 (18.24) | 56.23 (17.67) | 0.206 |
| Sex (%) | female | 405 (42.9) | 291 (43.8) | 114 (40.7) | 0.418 |
| male | 539 (57.1) | 373 (56.2) | 166 (59.3) | ||
| Race (%) | black | 67 (7.1) | 51 (7.7) | 16 (5.7) | 0.429 |
| other | 58 (6.1) | 43 (6.5) | 15 (5.4) | ||
| white | 819 (86.8) | 570 (85.8) | 249 (88.9) | ||
| Primary.site (%) | Aix of bones | 389 (41.2) | 274 (41.3) | 115 (41.1) | 0.606 |
| Limb bones | 514 (54.4) | 364 (54.8) | 150 (53.6) | ||
| Other | 41 (4.3) | 26 (3.9) | 15 (5.4) | ||
| Marital (%) | no | 344 (36.4) | 249 (37.5) | 95 (33.9) | 0.333 |
| yes | 600 (63.6) | 415 (62.5) | 185 (66.1) | ||
| Sequence.number (%) | more | 188 (19.9) | 133 (20.0) | 55 (19.6) | 0.963 |
| only one | 756 (80.1) | 531 (80.0) | 225 (80.4) | ||
| Tumor.size (mean (SD)) | NA | 79.20 (66.42) | 79.94 (72.61) | 77.45 (48.77) | 0.598 |
| Lymph (%) | No | 915 (96.9) | 646 (97.3) | 269 (96.1) | 0.536 |
| unknow | 20 (2.1) | 13 (2.0) | 7 (2.5) | ||
| yes | 9 (1.0) | 5 (0.8) | 4 (1.4) |