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Number of cancers in each category of the Nottingham Prognostic Index and survival
| NPI | Total number of cases | Five-year survival | Ten-year survival |
|---|---|---|---|
| I | 322 (20.8%) | 97% | 89% |
| II | 537 (34.7%) | 93% | 84% |
| III | 536 (34.7%) | 90% | 77% |
| IV | 151 (9.8%) | 88% | 73% |
| Total | 1,546 | 94% | 82% |
