Table 2. The International Staging System for Multiple Myeloma
| Stage | Criteria | Median Survival (mo) |
| I | Beta-2-microglobulin <3.5 mg/L and albumin ≥3.5 g/dL | 62 |
| II | Beta-2-microglobulin <3.5 mg/L and albumin <3.5 g/dL or beta-2-microglobulin 3.5 mg/L to <5.5 mg/L | 44 |
| III | Beta-2-microglobulin ≥5.5 mg/L | 29 |