Table 2.
Current TNM classifications and non-TNM cancer and patient characteristics
| Characteristics | n† | Mean ± standard deviation or frequency (%) |
| Age (years) | 4625 | 62 ± 11 |
| Male | 4626 | 3562 (77) |
| Race | 3587 | |
| White | 2339 (65) | |
| Asian | 1168 (33) | |
| Other | 80 (2) | |
| East (part of world) | 4627 | 1168 (25) |
| Location (location of cancer) | 4344 | |
| Upper third (1) | 177 (4) | |
| Middle third (2) | 1172 (27) | |
| Lower third (3) | 2995 (69) | |
| Length (cancer length cm) | 2229 | 3.3 ± 2.5 |
| T | 4609 | |
| is (0) | 335 (7) | |
| 1‡ | 1040 (23) | |
| 2 | 755 (16) | |
| 3 | 2329 (51) | |
| 4 | 150 (3) | |
| N | 4616 | |
| 0 | 2584 (56) | |
| 1 | 2032 (44) | |
| M | 4564 | |
| 0 | 4208 (92) | |
| 1§ | 356 (8) | |
| G (histologic grade) | 3816 | |
| G1 (1) | 1228 (32) | |
| G2 (2) | 1257 (33) | |
| G3 (3) | 1324 (35) | |
| G4 (4) | 7 (0) | |
| Cell (histopathologic cell type) | 4595 | |
| Squamous cell carcinoma (0) | 1841 (40) | |
| Adenocarcinoma (1) | 2754 (60) | |
| Nodes sampled (number of nodes sampled) | 3921 | 16.8 ± 16.1 |
| Nodes (number of cancer-positive lymph nodes) | 4507 | |
| 0 | 2584 (57) | |
| 1 | 547 (12) | |
| > 1 | 1376 (31) | |
| R (resection margins) | 4123 | |
| R0¶ (0) | 3572 (87) | |
| R1‖ (1) | 434 (11) | |
| R2# (2) | 117 (3) |
†
Nonmissing cases.
‡
T1a and T1b.
§
M1a and M1b.
¶
R0 = cancer free.
‖
R1 = microscopic.
#
R2 = macroscopic