Table 2.
The structure of the US features data; p-values produced by chi-square test.
| Parameter | Malignant lesion (%) | Benign lesion (%) | p-value |
|---|---|---|---|
| Composition | 0.004 | ||
| 3 = >50%Solid/Solid | 68 (38.20) | 110 (61.80) | |
| 2 = >50%Cystic/Almost Solid | 30 (26.32) | 84 (73.68) | |
| 1 = Cystic/Spongiform | 0 (0.00) | 13 (100.00) | |
| Echo pattern (in comparision to muscles) | <0.001 | ||
| 1 = Hypoechoic | 28 (65.12) | 15 (34.88) | |
| 2 = Izoechoic | 16 (37.21) | 27 (62.79) | |
| 3 = Hyperechoic | 54 (24.66) | 165 (75.34) | |
| Echo pattern (in comparision to thyroid) | <0.001 | ||
| 1 = Hypoechoic | 85 (39.35) | 131 (60.65) | |
| 2 = Izoechoic | 9 (12.16) | 65 (87.84) | |
| 3 = Hyperechoic | 4 (26.67) | 11 (73.33) | |
| Margins | <0.001 | ||
| 0 = Ill-define | 65 (67.01) | 32 (32.99) | |
| 1 = Well-define | 33 (15.87) | 175 (84.13) | |
| Tall/wide | 0.006 | ||
| 1 = Tall/wide >= 1 | 67 (38.51) | 107 (61.49) | |
| 0 = Tall/wide < 1 | 31 (23.66) | 100 (76.34) | |
| Microcalcifications | <0.001 | ||
| 1 = Present | 63 (52.94) | 56 (47.06) | |
| 0 = Absent | 35 (18.82) | 151 (81.18) | |
| Makrocalcifications | <0.001 | ||
| 1 = Present | 38 (51.35) | 36 (48.65) | |
| 0 = Absent | 60 (25.97) | 171 (74.03) | |
| Color doppler pattern | 0.404 | ||
| 3 = Mixed | 55 (33.95) | 107 (66.05) | |
| 2 = Central | 11 (28.95) | 27 (71.05) | |
| 1 = Peripheral | 26 (27.96) | 67 (72.04) | |
| 0 = Absent | 6 (50.00) | 6 (50.00) | |
| Thyroid capsule | <0.001 | ||
| 2 = Infiltration | 12 (92.31) | 1 (7.69) | |
| 1 = Deformation | 25 (43.86) | 32 (56.14) | |
| 0 = Not disturb | 61 (25.96) | 174 (74.04) | |
| “Halo” pattern | <0.001 | ||
| 2 = Partial/No | 93 (36.47) | 162 (63.53) | |
| 1 = Yes | 5 (10.00) | 45 (90.00) | |
| Asteria scale | <0.001 | ||
| 4 | 44 (66.67) | 22 (33.33) | |
| 3 | 35 (35.00) | 65 (65.00) | |
| 2 | 16 (14.16) | 97 (85.84) | |
| 1 | 3 (11.54) | 23 (88.46) | |