| ECOG | KPS Range | Functional Level | Chemo Eligibility |
|---|---|---|---|
| 0 | 90–100 | Fully active | Yes — all regimens |
| 1 | 70–80 | Ambulatory, light work | Yes — most regimens |
| 2 | 50–60 | Ambulatory, no work | Depends on regimen/toxicity |
| 3 | 30–40 | Limited self-care | Usually no; palliative only |
| 4 | 10–20 | Disabled | No curative; best supportive care |
