Table 2.
Risk stratification and outcomes of 4-year OS and PFS
| Risk group | Number of prognostic factors | Patients | 4-yr PFS (%) | 4-yr OS (%) |
|---|---|---|---|---|
| IPI | ||||
| Low | 0, 1 | 0 | – | – |
| Low-intermediate | 2 | 0 | – | – |
| High-intermediate | 3 | 11/20 | 0 | 23.9 |
| High | 4, 5 | 9/20 | 27.8 | 55.6 |
| NCCN-IPI | ||||
| Low | 0, 1 | 0 | – | – |
| Low-intermediate | 2, 3 | 4/20 | 0 | 0 |
| High-intermediate | 4, 5 | 12/20 | 25.0 | 50.0 |
| High | 6, 7, 8 | 4/20 | 0 | 50.0 |
| Revised IPI | ||||
| Low | 0 | 0 | – | – |
| Intermediate | 1, 2 | 0 | – | – |
| High | 3, 4, 5 | 20/20 | 16.9 | 33.3 |
Abbreviations: OS, overall survival; PFS, progression-free survival; IPI, International Prognostic Index; NCCN, National Comprehensive Cancer Network.