Table 2.
Total (n=190) | STAS (n=47) | Non-STAS (n=143) | t, F, or z value | p value | |
---|---|---|---|---|---|
Measurements | |||||
LD entire (mm) | 15 ± 4 | 16 ± 4 | 14 ± 3 | 4.025 | 0.055 |
LD solid (mm) | 10 ± 6 | 15 ± 5 | 9 ± 6 | 2.408 | 0.122 |
CTR | 0.7 ± 0.4 | 0.9 ± 0.2 | 0.6 ± 0.4 | 23.868 | 0.0001*** |
Nodule density | |||||
pGGNs | 33 [17.4] | 1 [2.1] | 32 [22.4] | – | 0.0007*** |
mGGNs | 87 [45.8] | 17 [36.2] | 70 [49.0] | 1.526 | 0.127 |
SNs | 70 [36.8] | 29 [61.7] | 41 [28.7] | 4.073 | <0.0001**** |
Location (lobe) | 0.588 | 0.557 | |||
Upper lobes | 94 [49.5] | 25 [53.2] | 69 [48.3] | ||
Non-upper lobes | 76 [40] | 22 [46.8] | 74 [51.7] | ||
Location (field) | 0.326 | 0.745 | |||
Central | 69 [36.3] | 18 [38.3] | 51 [35.7] | ||
Peripheral | 121 63.7] | 29 [61.7] | 92 [64.3] | ||
Shape | 1.849 | 0.064 | |||
Round or oval | 95 [50] | 29 [61.7] | 66 [46.2] | ||
Irregular | 95 [50] | 18 [38.3] | 77 [53.8] | ||
Vascular change | 0.602 | 0.547 | |||
normal | 106 [55.8] | 28 [59.6] | 78 [54.5] | ||
convergent | 84 [44.2] | 19 [40.4] | 65 [45.5] | ||
Cystic airspaces, n [%] | 73 [38.4] | 11 [23.4] | 62 [43.4] | 2.440 | 0.015* |
Edge features | |||||
Ground glass ribbon sign | 34 [17.9] | 22 [46.8] | 12 [8.4] | 5.961 | <0.0001**** |
Unclear tumor-lung interface | 38 [20] | 15 [31.9] | 23 [16.1] | 2.354 | 0.019* |
Lobulation | 70 [36.8] | 16 [34.0] | 54 [37.8] | 0.459 | 0.647 |
Spiculation | 92 [48.4] | 34 [72.3] | 58 [40.6] | 3.782 | 0.0002*** |
Satellite lesions | |||||
Absent | 171 [90] | 31 [66.0] | 140 [97.9] | – | <0.0001**** |
Ground glass satellites | 9 [4.7] | 9 [19.4] | 0 | – | <0.0001**** |
Solid satellites | 10 [5.3] | 7 [14.9] | 3 [2.1] | – | 0.003** |
Nodule-pleural types | |||||
No connection | 93 [48.9] | 11 [23.4] | 82 [57.3] | 4.038 | <0.0001**** |
Closeness | 69 [36.3] | 21 [44.7] | 48 [33.6] | 1.369 | 0.169 |
Attachment | 28 [14.7] | 15 [31.9] | 13 [9.1] | 3.83 | 0.0001*** |
LD entire, long diameter of entire tumor; LD solid, long diameter of solid component; CTR, consolidation tumor ratio; STAS, spread through air spaces; pGGNs, pure ground glass nodules; mGGNs, mixted ground glass nodules; SNs, solid nodules. Significant level marks: p < 0.05 *, p < 0.01 **, p < 0.001 ***, p < 0.0001 ****.