Table 2 Relationship between CT features and invasiveness of ground glass nodules
CT feature | NIAC (n = 310) | IAC (n = 245) | P |
|---|---|---|---|
maximum diameter(cm) | 0.9 (0.7, 1.2) | 1.2 (1, 1.5) |  < 0.001 |
CTR(%) | 5 (0, 20) | 40 (30, 60) |  < 0.001 |
maximum CT value(HU) | -280 (-380, -220) | -12 (-162, 110) |  < 0.001 |
mean CT value(HU) | -540 (-629.75, -450) | -370 (-460, -275) |  < 0.001 |
spiculation sign(%) |  |  |  < 0.001 |
No | 268 (86.45) | 105 (42.86) | Â |
Yes | 42 (13.55) | 140 (57.14) | Â |
vascular convergence sign(%) |  |  |  < 0.001 |
No | 273 (88.06) | 69 (28.16) | Â |
Yes | 37 (11.94) | 176 (71.84) | Â |
Pleura traction sign(%) |  |  |  < 0.001 |
No | 277 (89.35) | 177 (72.24) | Â |
Yes | 33 (10.65) | 68 (27.76) | Â |
Air Bronchogram Sign(%) | Â | Â | 0.151 |
No | 301 (97.1) | 231 (94.29) | Â |
Yes | 9 (2.9) | 14 (5.71) | Â |
lobulation sign(%) |  |  |  < 0.001 |
No | 282 (90.97) | 179 (73.06) | Â |
Yes | 28 (9.03) | 66 (26.94) | Â |
Vacuole Sign(%) | Â | Â | 0.133 |
No | 228 (73.55) | 165 (67.35) | Â |
Yes | 82 (26.45) | 80 (32.65) | Â |