Table 4 Comparison of malignancy rates with four TI-RADSs.
Scoring System and Category | Final Diagnosis* | Recommended Malignancy Risk (%) | Calculated Malignancy Rate (%) | P Value | |
|---|---|---|---|---|---|
Benign (n = 547) | Malignant (n = 464) | ||||
TI-RADS H | <0.001 | ||||
2 | 67 (12.2) | 0 (0.0) | 0.0 | 0.0 | |
3 | 201 (36.7) | 5 (1.1) | <5.0 | 2.4 | |
4a | 121 (22.1) | 11 (2.4) | 5.0–10.0 | 8.3 | |
4b | 125 (22.9) | 177 (38.1) | 11.0–65.0 | 58.6 | |
4c | 30 (5.5) | 188 (40.5) | 66.0–95.0 | 86.2 | |
5 | 3 (0.6) | 83 (17.9) | >95.0 | 96.5 | |
TI-RADS P | <0.001 | ||||
1 | 198 (36.2) | 2 (0.4) | 0.0–7.0 | 1.0 | |
2 | 192 (35.1) | 13 (2.8) | 8.0–23.0 | 6.3 | |
3 | 81 (14.8) | 62 (13.4) | 24.0–50.0 | 43.4 | |
4 | 76 (13.9) | 332 (71.5) | 51.0–90.0 | 81.4 | |
5 | 0 (0.0) | 55 (11.9) | 91.0–100.0 | 100.0 | |
TI-RADS K | <0.001 | ||||
2 | 154 (28.2) | 0 (0.0) | 0.0 | 0.0 | |
3 | 133 (24.3) | 4 (0.9) | 2.0–2.8 | 2.9 | |
4a | 123 (22.5) | 11 (2.4) | 3.6–12.7 | 8.2 | |
4b | 92 (16.8) | 56 (12.1) | 6.8–37.8 | 37.8 | |
4c | 42 (7.7) | 345 (74.3) | 21.0–91.9 | 89.1 | |
5 | 3 (0.5) | 48 (10.3) | 88.7–97.9 | 94.1 | |
TI-RADS R | <0.001 | ||||
2 | 68 (12.5) | 0 (0.0) | 0.0 | 0.0 | |
3 | 179 (32.7) | 3 (0.6) | <2.0 | 2.6 | |
4a | 214 (39.1) | 42 (9.1) | 2.0–10.0 | 16.4 | |
4b | 80 (14.6) | 299 (64.4) | 10.0–95.0 | 78.9 | |
5 | 6 (1.1) | 120 (25.9) | > 95.0 | 95.2 | |
