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| Interval cancers within 12 months (O) | Expected cancers (E) | Sensitivitya (%) | |
|---|---|---|---|
| 1st screen | 13 | 49.4 | 73.6 |
| 2nd and 3rd screen | 47 | 88.4 | 46.8 |
| 4th and 5th screen | 28 | 68.1 | 58.9 |
| Later screens | 11 | 31.0 | 64.5 |
In situ and microinvasive cases excluded.
(1−O/E) × 100%.
