Table 2.
Risk factors for IA.
| Case (n) | OR (95% CI) | p value | |
|---|---|---|---|
| Pleural depression sign | |||
| No | 260 | 1 | 0.046* |
| Yes | 296 | 1.687 (1.010–2.820) | |
| Vacuole sign | |||
| never | 435 | 1 | 0.01* |
| <1 year | 121 | 2.334 (1.222–4.460) | |
| Burr sign | |||
| No | 443 | 1 | 0.048* |
| Yes | 113 | 2.617 (1.008–6.795) | |
| Lobulated sign | |||
| No | 441 | 1 | 0.032* |
| Yes | 115 | 3.006 (1.098–8.227) | |
| Bronchial sign | |||
| No | 420 | 1 | 0.001** |
| Yes | 136 | 3.134 (1.556–6.310) | |
| GGN diameter | 3.118 (1.151–8.445) | 0.025* | |
| CTR | 172.517 (48.023–619.745) | <0.001*** | |
Adjusted for the model, the risk of IA was associated with the pleural depression sign, vacuole sign, burr sign, lobulated sign, bronchial sign, GGN diameter, and CTR. *p < 0.05, **p < 0.01, ***p < 0.001.