Table 2 Comparison of mammographic factors between pure DCIS and DCIS with invasive upgrade
| Â | Total DCIS (n = 440) | Mammographically detected DCIS (n = 341) | ||||
|---|---|---|---|---|---|---|
Pure DCIS (n = 323) | DCIS with invasive upgrade (n = 117) | p value | Pure DCIS (n = 238) | DCIS with invasive upgrade (n = 103) | p value | |
Imaging features on mammography | Â | Â | < 0.001 | Â | Â | 0.007 |
 Occult | 85 (26.3) | 14 (21.0) |  | - | - |  |
 Calcifications only | 123 (38.1) | 47 (40.2) |  | 123 (51.7) | 47 (45.6) |  |
 Mass/asymmetry/distortion | 58 (18.0) | 15 (12.8) |  | 58 (24.4) | 15 (14.6) |  |
 Combined | 57 (17.7) | 41 (35.0) |  | 57 (23.9) | 41 (39.8) |  |
Final assessment on mammography | Â | Â | < 0.001 | Â | Â | < 0.001 |
 BI-RADS 1–2 | 85 (26.3) | 14 (12.0) |  | - | - |  |
 BI-RADS 3 | 12 (3.7) | 3 (2.5) |  | 12 (5.0) | 3 (2.9) |  |
 BI-RADS 4a | 65 (20.1) | 12 (10.3) |  | 65 (27.3) | 12 (11.7) |  |
 BI-RADS 4b | 55 (17.0) | 16 (13.7) |  | 55 (23.1) | 16 (15.5) |  |
 BI-RADS 4c | 74 (22.9) | 33 (28.2) |  | 74 (31.1) | 33 (32.0) |  |
 BI-RADS 5 | 32 (9.9) | 39 (33.3) |  | 32 (13.4) | 39 (37.9) |  |
Raw numerical AI-CAD score (%, median [Q1,Q3]) | 56.9 (5.9, 97.3) | 96.6 (44.8, 99.5) | < 0.001 | 88.9 (33.1, 98.7) | 98.1 (83.0, 99.6) | < 0.001 |
Dichotomized AI-CAD score | Â | Â | < 0.001 | Â | Â | 0.002 |
 AI-CAD score < 50% | 155 (48.0) | 30 (25.6) |  | 76 (31.3) | 16 (15.5) |  |
 AI-CAD score ≥ 50% | 168 (52.0) | 87 (74.4) |  | 167 (68.7) | 87 (84.5) |  |
Graded AI-CAD score | Â | Â | < 0.001 | Â | Â | 0.016 |
 AI-CAD score < 25% | 123 (38.1) | 22 (18.8) |  | 47 (19.7) | 9 (8.7) |  |
 AI-CAD score 25–50% | 32 (9.9) | 8 (6.8) |  | 24 (10.1) | 7 (6.8) |  |
 AI-CAD score 50–75% | 27 (8.4) | 8 (6.8) |  | 26 (10.9) | 8 (7.8) |  |
 AI-CAD score ≥ 75% | 141 (43.7) | 79 (67.5) |  | 141 (59.2) | 79 (76.7) |  |