Table 3 Clinical characteristics of patients in the modeling and validation groups
Variable | Classification | Modeling group | Validation group | p |
|---|---|---|---|---|
n | (1010) | (1009) | ||
Age (%) | 18-59 | 563 (55.7) | 598 (59.3) | 0.268 |
60-72 | 305 (30.2) | 277 (27.5) | ||
73-96 | 142 (14.1) | 134 (13.3) | ||
Grade (%) | Well differentiated | 86 ( 8.5) | 97 ( 9.6) | 0.556 |
Moderately differentiated | 192 (19.0) | 189 (18.7) | ||
Poorly differentiated | 465 (46.0) | 438 (43.4) | ||
Undifferentiated | 267 (26.4) | 285 (28.2) | ||
AJCC stage (%) | Stage I | 342 (33.9) | 356 (35.3) | 0.103 |
Stage II | 144 (14.3) | 158 (15.7) | ||
Stage III | 373 (36.9) | 381 (37.8) | ||
Stage IV | 151 (15.0) | 114 (11.3) | ||
SEER stage (%) | Localized | 180 (17.8) | 209 (20.7) | 0.229 |
Regional | 344 (34.1) | 341 (33.8) | ||
Distant | 486 (48.1) | 459 (45.5) |