Table 4.
TNM classification (AJCC 2009, only with four clinical classifications)
| Current study | AJCC data | P‐value | |||
|---|---|---|---|---|---|
| Number | % of Total | % Among patients with T1a‐T4b | |||
| T status | |||||
| Tis | 753 | 23.6% | |||
| T1a | 518 | 16.2% | 21.6% | 34.2% | P < 0.000001 chi‐square test |
| T1b | 75 | 2.4% | 3.1% | 8.6% | |
| T2a | 321 | 10.1% | 13.4% | 5.5% | |
| T2b | 105 | 3.3% | 4.4% | 23.6% | |
| T3a | 277 | 8.7% | 11.6% | 11.3% | |
| T3b | 298 | 9.3% | 12.4% | 7.8% | |
| T4a | 225 | 7.1% | 9.4% | 3.8% | |
| T4b | 576 | 18.1% | 24.1% | 5.1% | |
| Not available | 40 | 1.3% | |||
| Number | % of Total | % Among patients with N1a‐N3 | |||
|---|---|---|---|---|---|
| N status | |||||
| 0 | 2249 | 70.5% | |||
| N1a | 259 | 8.1% | 29.1% | 44.3% | P < 0.000001 chi‐square test |
| N1b | 81 | 2.5% | 9.1% | 4.7% | |
| N2a | 154 | 4.8% | 17.3% | 17.4% | |
| N2b | 82 | 2.6% | 9.2% | 4.6% | |
| N2c | 38 | 1.2% | 4.3% | 12.1% | |
| N3 | 275 | 8.6% | 30.9% | 16.9% | |
| Not available | 50 | 1.6% | |||
| Number | % of Total | ||||
|---|---|---|---|---|---|
| M status | |||||
| 0 | 2990 | 93.8% | 6.2% | ||
| M1 | 46 | 1.4% | |||
| M1a | 43 | 1.3% | |||
| M1b | 79 | 2.5% | |||
| M1c | 30 | 0.9% | |||