Table 2 TNM stage, age, and PS among the groups
| Â | Group 1 ( n =39) | Group 2 ( n =26) | Group 3 ( n =21) | Group 4 ( n =48) |
|---|---|---|---|---|
Stage | ||||
 III | 26 | 14 | 5 | 18 |
 IVA | 13 | 12 | 14 | 28 |
 IVB | 0 | 0 | 2 | 2 |
Age (years) | ||||
 Median | 73 | 59 | 77 | 59 |
 Range | 51–90 | 25–73 | 62–87 | 25–73 |
PS | ||||
 0 | 2 | 8 | 3 | 13 |
 1 | 29 | 17 | 14 | 33 |
 2 | 6 | 1 | 3 | 1 |
 3 | 2 | 0 | 1 | 1 |