Table 1.
Characteristics of patients.
| Variable | Total [n (%)] | Training [n (%)] | External [n (%)] | P |
|---|---|---|---|---|
| Age | 1444 | 739 | <0.001 | |
| <65 | 598 (41.4) | 506 (68.5) | ||
| ≥65 | 846 (58.6) | 233 (31.5) | ||
| Sex | <0.001 | |||
| Male | 784 (54.3) | 527 (71.3) | ||
| Female | 660 (45.7) | 212 (28.7) | ||
| Race | <0.001 | |||
| White | 1108 (76.7) | 0 (0.0) | ||
| Black | 99 (6.9) | 0 (0.0) | ||
| API | 217 (15.0) | 0 (0.0) | ||
| Other | 20 (1.4) | 739 (100.0) | ||
| Grade | <0.001 | |||
| Well/moderately | 1200 (83.1) | 314 (42.5) | ||
| Poorly/undifferentiated | 166 (11.5) | 363 (49.1) | ||
| Unknown | 78 (5.4) | 62 (8.4) | ||
| Size (cm) | <0.001 | |||
| <3 | 458 (31.7) | 133 (18.0) | ||
| ≥3 | 781 (54.1) | 606 (82.0) | ||
| Unknown | 205 (14.2) | 0 (0.0) | ||
| T stage | <0.001 | |||
| T1 | 400 (27.7) | 128 (17.3) | ||
| T2 | 325 (22.5) | 98 (13.3) | ||
| T3 | 616 (42.7) | 233 (31.5) | ||
| T4a | 68 (4.7) | 189 (25.6) | ||
| T4b | 35 (2.4) | 91 (12.3) | ||
| ELN count, median | 9 | 10 | <0.001 | |
| Positive ELN count, median | 2 | 1 | <0.001 |
API, Asian/Pacific Islander; ELN, examined lymph nodes.