Table 1.
>Statistical analysis results of clinical characteristics.
| Characteristic | Training cohort | P | Validation cohort | P | ||
|---|---|---|---|---|---|---|
| Benign (n = 33) | Malignant (n = 46) | Benign (n = 17) | Malignant (n = 24) | |||
| Age (years) | 0.008 | 0.009 | ||||
| <40 | 10 (30.3) | 4 (8.7) | 6 (35.2) | 2 (8.3) | ||
| 40–49 | 14 (42.4) | 19 (41.3) | 8 (47.1) | 9 (37.5) | ||
| 50–59 | 8 (24.2) | 11 (23.9) | 3 (17.6) | 4 (16.7) | ||
| >=60 | 1 (3.0) | 12 (26.1) | 0 (0.0) | 9 (37.5) | ||
| Family history of breast cancer, n (%) | 0.693 | 1.000 | ||||
| + | 2 (6.1) | 5 (10.9) | 2 (11.8) | 2 (8.3) | ||
| – | 31 (93.9) | 41 (89.1) | 15 (88.2) | 22 (91.7) | ||
| History of biopsy, n (%) | 0.171 | 1.000 | ||||
| + | 2 (6.1) | 0 (0.0) | 1 (89.7) | 1 (4.2) | ||
| – | 31 (93.9) | 46 (1.0) | 16 (10.3) | 23 (95.8) | ||
| Menstruation status, n (%) | 0.001 | 0.002 | ||||
| + | 6 (76.8) | 20 (49.3) | 1 (89.7) | 13 (30.3) | ||
| – | 27 (23.2) | 26 (50.7) | 16 (10.3) | 11 (69.7) | ||
| BI-RADS (DM plus DBT), n (%) | <0.001 | <0.001 | ||||
| 0, 1, 2, 3 | 8 (24.2) | 0 (0.0) | 6 (35.3) | 1 (4.2) | ||
| 4A, 4B, 4C | 24 (72.7) | 32 (69.6) | 11 (64.7) | 15 (62.5) | ||
| 5, 6 | 1 (3.0) | 14 (30.4) | 0 (0.0) | 8 (33.3) | ||
| BI-RADS (MRI), n (%) | <0.001 | |||||
| 1, 2, 3 | 18 (54.5) | 0 (0.0) | 8 (47.1) | 0 (0.0) | ||
| 4, 5 | 15 (45.5) | 46 (100.0) | 9 (52.9) | 24 (100.0) | ||
BI-RADS, breast imaging reporting and data system; DM, digital mammography; DBT, digital breast tomosynthesis; MRI, magnetic resonance imaging.