Table 2.
Cancer absent in contralateral breast | Cancer present in contralateral breast | |||
---|---|---|---|---|
Number breasts | Mean FP/breast | Number breasts | Mean FP/breast | |
Institution 1 | 38 | 0.34 | 5 | 0.80 |
Institution 4 | 4 | 1.00 | 25 | 5.96 |
All 5 Institutions | 42 | 0.48 | 38 | 4.29 |