Table 2.
Comparison of CT imaging features between the two groups
| Image feature | Benign group (n = 102) | Malignant group (n = 98) | χ2/Z | p |
|---|---|---|---|---|
| Diameter | 0.869 | 0.648 | ||
| 0-10 mm | 21 (20.59%) | 20 (20.14%) | ||
| 11-20 mm | 45 (44.12%) | 49 (50.00%) | ||
| 21-30 mm | 36 (35.29%) | 29 (29.86%) | ||
| Shape | 0.905 | 0.341 | ||
| Circle/quasi-circle | 72 (70.59%) | 63 (64.29%) | ||
| Irregularity | 30 (29.41%) | 35 (35.71%) | ||
| Position | 3.504 | 0.061 | ||
| Superior lobe | 49 (48.04%) | 60 (61.22%) | ||
| Other leaf | 53 (51.96%) | 38 (38.78%) | ||
| Lobulation | 22 (21.57%) | 77 (78.57%) | 64.967 | 0.000 |
| Burr sign | 15 (14.71%) | 60 (61.22%) | 46.146 | 0.000 |
| Pleural indentation | 5 (4.90%) | 37 (37.76%) | 32.516 | 0.000 |
| Calcification | 40 (39.22%) | 8 (8.16%) | 26.422 | 0.000 |
| Bronchial amputation sign | 15 (14.71%) | 14 (14.29%) | 0.007 | 0.933 |
| Boundary | 0.028 | 0.867 | ||
| Clear | 93 (91.18%) | 90 (91.84%) | ||
| Blur | 9 (8.82%) | 8 (8.16%) | ||
| Cavity sign | 15 (14.71%) | 17 (17.35%) | 0.259 | 0.611 |
| Vascular cluster sign | 5 (4.90%) | 47 (48.00%) | 48.160 | 0.000 |
| Nodule density | 46.162 | 0.000 | ||
| Solid nodule | 93 (91.18%) | 46 (46.94%) | ||
| Mix ground glass nodules | 5 (4.90%) | 27 (27.55%) | ||
| Pure ground glass nodules | 4 (3.92%) | 25 (25.51%) |