Table 1.
Clinical characteristics of GC patients in the training and validation set
| Clinical features | Level | Overall | Training | Validation | Statistical P-value |
|---|---|---|---|---|---|
| Samples | 303 | 212 | 91 | ||
| Survival status (%) | Alive | 177 (58.4) | 121 (57.1) | 56 (61.5) | 0.552 |
| Dead | 126 (41.6) | 91 (42.9) | 35 (38.5) | ||
| Age (%) | < 65 | 134 (44.2) | 97 (45.8) | 37 (40.7) | 0.489 |
| > = 65 | 169 (55.8) | 115 (54.2) | 54 (59.3) | ||
| Sex (%) | Female | 112 (37.0) | 75 (35.4) | 37 (40.7) | 0.457 |
| Male | 191 (63.0) | 137 (64.6) | 54 (59.3) | ||
| pStage (%) | I/II | 138 (45.5) | 92 (43.4) | 46 (50.5) | 0.308 |
| III/IV | 165 (54.5) | 120 (56.6) | 45 (49.5) | ||
| pT (%) | T1 | 12 (4.0) | 11 (5.2) | 1 (1.1) | 0.265 |
| T2 | 63 (20.8) | 42 (19.8) | 21 (23.1) | ||
| T3 | 148 (48.8) | 100 (47.2) | 48 (52.7) | ||
| T4 | 80 (26.4) | 59 (27.8) | 21 (23.1) | ||
| pN (%) | N0 | 93 (30.7) | 67 (31.6) | 26 (28.6) | 0.566 |
| N1 | 81 (26.7) | 57 (26.9) | 24 (26.4) | ||
| N2 | 65 (21.5) | 41 (19.3) | 24 (26.4) | ||
| N3 | 64 (21.1) | 47 (22.2) | 17 (18.7) | ||
| pM (%) | M0 | 282 (93.1) | 197 (92.9) | 85 (93.4) | 1 |
| M1 | 21 (6.9) | 15 (7.1) | 6 (6.6) | ||
| Grade (differentiated, %) | Well | 7 (2.3) | 7 (3.3) | 0 (0.0) | 0.19 |
| Moderately | 100 (33.0) | 74 (34.9) | 26 (28.6) | ||
| Poorly | 188 (62.0) | 126 (59.4) | 62 (68.1) | ||
| Undifferentiated | 8 (2.6) | 5 (2.4) | 3 (3.3) |
* The statistical differences between two groups were tested by χ2 or Fisher exact tests, if appropriate. pT: pathological T stage. pN: pathological N stage. pM: pathological M stage