Non-upgraded group | Upgraded group | P value | |
---|---|---|---|
Mean age (years) | 47.7 ± 11.1 | 64.6 ± 13.7 | 0.017 |
Lesion size (mm) | 16.8 ± 9.1 | 22.2 ± 12.2 | N.S. |
Distance from nipple (cm) | 3.2 ± 4.1 | 8.3 ± 4.6 | N.S. |
Microcalcification | 4/14 | 1/4 | N.S. |
BI-RADS | 4B: 7/11; 4A: 2/11; 2: 2/11; not evaluated: 11 | 4B: 3/4; 4A: 1/4; not evaluated: 3 | N.S. |