| N/L | N | Death | Survival months | Survival rate (%) | |||
| Mean | SE | 1 yr | 3 yr | 5 yr | |||
| ≤1.62 | 187 | 11 | 76.1 | 0.9 | 99 | 97 | 94 |
| 1.63 to 2.57 | 174 | 16 | 122 | 2.4 | 99 | 93 | 91 |
| ≥2.58 | 123 | 19 | 95.4 | 2.7 | 98 | 89 | 84 |