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Number of false positives required to find cancer per person
| Number | 40–49 years | ≥50 years |
|---|---|---|
| False positives/breast cancer cases | 4.5 | 5.3 |
| Worst scenarioa | 6.2 | 8.2 |
| Aged 50–59 years | ||
| USA (BCSC) | 37.6 | 18.4 |
| Japan (JABCS) | 30.8 | 25.5 |
BCSC Breast Cancer Surveillance Consortium
aWorst scenario: the result of further exams was unidentified in 91 subjects. Worst scenario is the result if all of these 91 women are assumed to show false positive results
