Table 1 Clinical baseline characteristics of 201 patients in the training and test groups
Feature name | Training group (n = 141) | Test group (n = 60) | p’ | ||||
|---|---|---|---|---|---|---|---|
FTA (n = 45) | FTC (n = 96) | p value | FTA (n = 23) | FTC (n = 37) | p value | ||
Age(mean ± SD) | 48.69 ± 15.53 | 45.15 ± 12.10 | 0.142 | 48.52 ± 13.54 | 50.68 ± 12.50 | 0.532 | 0.080 |
 Mean diameter(mm, median ± IQR) | 16.45 ± 14.78 | 18.68 ± 11.10 | 0.207 | 17.90 ± 7.30 | 18.60 ± 11.45 | 0.927 | 0.947 |
Gender | Â | Â | 0.230 | Â | Â | 0.970 | 0.483 |
 Female | 39 (86.67) | 75 (78.12) |  | 19 (82.61) | 32 (86.49) |  |  |
 Male | 6 (13.33) | 21 (21.88) |  | 4 (17.39) | 5 (13.51) |  |  |
Taller than wide | Â | Â | 0.992 | Â | Â | 1.000 | 0.637 |
 Absent | 37 (82.2) | 79(82.3) |  | 20(87.0) | 31(83.8) |  |  |
 Present | 8 (17.8) | 17 (17.7) |  | 3(13.0) | 6 (16.2) |  |  |
 Location |  |  | 0.975 |  |  | 0.900 | 0.174 |
 Isthmus | 3 (6.67) | 6 (6.25) |  | 1 (4.35) | 1 (2.70) |  |  |
 Left | 19 (42.22) | 39 (40.62) |  | 12 (52.17) | 21 (56.76) |  |  |
 Right | 23 (51.11) | 51 (53.12) |  | 10 (43.48) | 15 (40.54) |  |  |
 Echogenicity |  |  | < 0.001 |  |  | 0.103 | 0.939 |
Hyperechogenicity | 2 (4.44) | 2 (2.08) | Â | 1 (4.35) | 0.000 | Â | Â |
Isoechogenicity | 15 (33.33) | 6 (6.25) | Â | 6 (26.09) | 4 (10.81) | Â | Â |
Hypoechogenicity | 28 (62.22) | 88 (91.67) | Â | 16 (69.57) | 33 (89.19) | Â | Â |
 Composition |  |  | < 0.001 |  |  | 0.435 | 0.985 |
Cystic and solid | 14 (31.11) | 7 (7.29) | Â | 5 (21.74) | 4 (10.81) | Â | Â |
 Solid | 31 (68.89) | 89 (92.71) |  | 18 (78.26) | 33 (89.19) |  |  |
Nodule-in-nodule | Â | Â | 0.451 | Â | Â | 1.000 | 0.200 |
 Absent | 42 (93.33) | 84 (87.50) |  | 22 (95.65) | 35 (94.59) |  |  |
 Present | 3 (6.67) | 12 (12.50) |  | 1 (4.35) | 2 (5.41) |  |  |
Trabecular formation | Â | Â | 0.024 | Â | Â | 0.164 | 0.405 |
 Absent | 35 (77.78) | 56 (58.33) |  | 16 (69.57) | 19 (51.35) |  |  |
 Present | 10 (22.22) | 40 (41.67) |  | 7 (30.43) | 18 (48.65) |  |  |
 Margin |  |  | 0.437 |  |  | 0.329 | 0.748 |
 Smooth | 19 (42.22) | 34 (35.42) |  | 11 (47.83) | 13 (35.14) |  |  |
Unclear or Irregular | 26 (57.78) | 62 (64.58) | Â | 12 (52.17) | 24 (64.86) | Â | Â |
 Halo |  |  | 0.318 |  |  | 0.062 | 0.174 |
 Absent | 37 (82.22) | 79 (82.29) |  | 15 (65.22) | 30 (81.08) |  |  |
Uniform Thin Halo | 3 (6.67) | 2 (2.08) | Â | 5 (21.74) | 1 (2.70) | Â | Â |
 Uneven halo | 5 (11.11) | 15 (15.62) |  | 3 (13.04) | 6 (16.22) |  |  |
Tumor Protrusion | Â | Â | 0.432 | Â | Â | 0.133 | 0.222 |
 Absent | 28 (62.22) | 53 (55.21) |  | 18 (78.26) | 22 (59.46) |  |  |
 Present | 17 (37.78) | 43 (44.79) |  | 5 (21.74) | 15 (40.54) |  |  |
 Calcification |  |  | < 0.001 |  |  | 0.013 | 0.349 |
 Absent | 28 (62.22) | 25 (26.04) |  | 17 (73.91) | 13 (35.14) |  |  |
Microcalcification | 10 (22.22) | 40 (41.67) | Â | 3 (13.04) | 9 (24.32) | Â | Â |
Macrocalcification | 7 (15.56) | 31 (32.29) | Â | 3 (13.04) | 15 (40.54) | Â | Â |
 Arrival time |  |  | 0.001 |  |  | 0.232 | 0.824 |
 Earlier | 8 (17.78) | 18 (18.75) |  | 3 (13.04) | 6 (16.22) |  |  |
 Synchronous | 31 (68.89) | 37 (38.54) |  | 15 (65.22) | 16 (43.24) |  |  |
 later | 6 (13.33) | 41 (42.71) |  | 5 (21.74) | 15 (40.54) |  |  |
Perfusion defect | Â | Â | 0.009 | Â | Â | 0.224 | 0.976 |
 Absent | 20 (44.44) | 22 (22.92) |  | 9 (39.13) | 9 (24.32) |  |  |
 Present | 25 (55.56) | 74 (77.08) |  | 14 (60.87) | 28 (75.68) |  |  |
Peak Intensity | Â | Â | 0.668 | Â | Â | 0.152 | 0.462 |
Hypoenhancement | 4 (8.89) | 6 (6.25) | Â | 3 (13.04) | 3 (8.11) | Â | Â |
Isoenhancement | 25 (55.56) | 49 (51.04) | Â | 13 (56.52) | 13 (35.14) | Â | Â |
Hyperenhancement | 16 (35.56) | 41 (42.71) | Â | 7 (30.43) | 21 (56.76) | Â | Â |
Ring enhancement |  |  | < 0.001 |  |  | 0.006 | 0.375 |
 Absent | 28 (62.22) | 72 (75.00) |  | 15 (65.22) | 31 (83.78) |  |  |
 Complete | 15 (33.33) | 1(1.04) |  | 7 (30.43) | 1 (2.70) |  |  |
 Incomplete | 2 (4.44) | 23 (23.96) |  | 1 (4.35) | 5 (13.51) |  |  |
C-TIRADS |  |  | < 0.001 |  |  | 0.128 | 0.538 |
 3 | 31(68.89) | 27(28.12) |  | 12(52.17) | 8(21.62) |  |  |
 4a | 6(13.33) | 24(25.00) |  | 6(26.09) | 9(24.32) |  |  |
 4b | 4(8.89) | 15(15.62) |  | 3(13.04) | 10(27.03) |  |  |
 4c | 2(4.44) | 17(17.71) |  | 1(4.35) | 5(13.51) |  |  |
 5 | 2(4.44) | 13(13.54) |  | 1(4.35) | 5(13.51) |  |  |