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| Score | 0 | 1 | 2 | 4 |
| Age (years) | <40 | ≥40 | — | — |
| Antecedent pregnancy | Mole | Abortion | Term | — |
| Interval months from index pregnancy | <4 | 4–<7 | 7–<13 | ≥13 |
| Pretreatment serum β-hCG (iu/mL) | <103 | 103–<104 | 104–<105 | ≥105 |
| Largest tumor size (cm) (including uterus) | <3 | 3–<5 | ≥5 | — |
| Site of metastases | Lung | Spleen, kidney | Gastrointestinal | Liver, brain |
| Number of metastases | — | 1–4 | 5–8 | >8 |
| Previous failed chemotherapy | — | — | Single drug | Two or more drugs |
Source: FIGO Oncology Committee (2003) [10].
