1. Common meta‐analysis stage scale (original analyses ‐ based on TNM 4th edition).
T stage | N stage | M stage | Meta‐analysis stage | AJCC stage |
0, 1, 2, X, iS | 0 | 0 | I | I |
0, 1, 2, X, iS | 1 | 0 | II | II |
Any | 2, 3 | 0 | III | III non‐metastatic |
3, 4 | Any | 0 | III | III non‐metastatic |
Any | Any | 1 | IV | Any metastatic |
AJCC = American Joint Committee on Cancer.