Table 4. Overall survival and relative risk of death according to risk group as defined by the new prognostic index.
| Risk group | No. of factorsa | No. of patients (%) | 3-year OS (%) | RR (95% CI) |
| Group 1 | 0 | 73 (39.5) | 86.8 | 1.0 (N/A) |
| Group 2 | 1 | 49 (26.5) | 64.3 | 2.7 (1.2–5.8) |
| Group 3 | 2 | 46 (24.9) | 37.9 | 5.8 (2.8–12.2) |
| Group 4 | 3–4 | 17 (9.2) | 12.9 | 13.3 (5.8–30.7) |
a
Factors: age >60 years, LDH >245 U/l, CRP>10 mg/L, and albumin <35 g/L.
Abbreviations: OS: overall survival; RR: relative risk; CI: confidence interval; N/A: not applicable.