Table 4. Prognostic index score according to the HR (n value).
| Characteristic | Score | n (HR=en) |
|---|---|---|
| Volume of GTV-nx >30 cm3 |
2 |
0.45 |
| Synchronous nodal recurrence |
2 |
0.49 |
| Age >50 years |
2 |
0.51 |
| KPS ⩽70 |
3 |
0.89 |
| With significant complications |
3 |
0.92 |
| Recurrent T3–4 |
3 |
0.93 |
| Maximum score | 15 |
Abbreviations: GTV=gross tumour volume; HR=hazard ratio; KPS=Karnosky performance score.
According to the HR (n value), the maximum value of recurrent T3–4 is 1.5 times of the minimum value of volume of GTV-nx. To simplicity, we assume that the value of baseline is 2.