Table 3. Analysis and comparison of CT signs among different pathological subtypes.
| CT signs | AAH/AIS (n=55) | MIA (n=93) | IAC (n=76) | χ 2 | P-value |
|---|---|---|---|---|---|
| Density type | 33.199 | 0.001 | |||
| pGGNs | 47 (85.45%)1 | 61 (65.59%)2 | 28 (36.84%)3 | ||
| mGGNs | 8 (14.55%)1 | 32 (34.41%)2 | 48 (63.16%)3 | ||
| Shape | 23.156 | 0.001 | |||
| Round/oval | 40 (72.73%)1 | 43 (46.24%)2 | 23 (30.26%)3 | ||
| Irregular | 15 (27.27%)1 | 50 (54.76%)2 | 53 (69.74%)3 | ||
| Location | 8.653 | 0.371 | |||
| Superior lobe of right lung | 26 (47.27%) | 31 (33.70%) | 31 (36.56%) | ||
| Middle lobe of right lung | 5 (9.09%) | 11 (11.96%) | 11 (11.83%) | ||
| Inferior lobe of right lung | 7 (12.73%) | 14 (15.22%) | 13 (13.98%) | ||
| Superior lobe of left lung | 12 (21.82%) | 23 (25.00%) | 23 (24.73%) | ||
| Inferior lobe of left lung | 5 (9.09%) | 13 (14.13%) | 12 (12.90%) | ||
| Peripheral signs | |||||
| Lobulation | 20 (36.36%)1 | 50 (53.76%)2 | 71 (93.42%)3 | 50.287 | 0.001 |
| Spiculation | 11 (20.00%) | 32 (34.41%)2 | 51 (67.11%)3 | 32.799 | 0.001 |
| Internal signs | |||||
| Vacuolar sign | 12 (21.80%) | 28 (30.10%) | 32 (42.10%)3 | 6.323 | 0.042 |
| Air bronchogram | 11 (20.00%) | 27 (29.03%)2 | 39 (51.32%)3 | 15.884 | 0.001 |
| Adjacent structure | |||||
| Pleural indentation | 2 (3.64%) | 12 (12.90%)2 | 35 (46.05%)3 | 41.082 | 0.001 |
| Vascular convergence | 39 (70.91%) | 76 (81.72%)2 | 71 (93.42%)3 | 11.675 | 0.003 |
| Tumor–lung interface | 0.351 | 0.839 | |||
| Blurred | 33 (60.00%) | 58 (62.37%) | 44 (57.89%) | ||
| Clear | 22 (40.00%) | 35 (37.63%) | 32 (42.11%) |
1Indicates a statistically significant difference between AAH/AIS and MIA.
2Indicates a statistically significant difference between MIA and IAC.
3Indicates a statistically significant difference between IAC and AAH/AIS.
Bonferroni method was used for pairwise comparison(for all, P<0.05 after adjustment).