Table 1.
Incidence of thin-section CT findings in nonsmokers and smokers (172 cases and 1,032 lobes)
| CT finding | Nonsmokers | Mild/moderate smokers | Heavy smokers | All smokers |
|---|---|---|---|---|
| LAA | ||||
| Case | 6.1% (3/49) | 58.6% (34/58) | 83.1% (54/65) | 71.5% (88/123) |
| Lobe | 2.4% (7/294) | 35.1% (122/348) | 59.7% (233/390) | 48.1% (355/738) |
| CCVW | ||||
| Case | 2.0% (1/49) | 27.6% (16/58) | 40.0% (26/65) | 34.1% (42/123) |
| Lobe | 0.7% (2/294) | 11.5% (40/348) | 23.3% (91/390) | 17.8% (131/738) |
| GGAR | ||||
| Case | 12.2% (6/49) | 37.9% (22/58) | 43.1% (28/65) | 40.7% (50/123) |
| Lobe | 6.8% (20/294) | 16.4% (57/348) | 23.8% (93/390) | 20.3% (150/738) |
| DICN | ||||
| Case | 4.1% (2/49) | 6.9% (4/58) | 9.2% (6/65) | 8.1% (10/123) |
| Lobe | 3.1% (9/294) | 5.7% (20/348) | 6.9% (27/390) | 6.4% (47/738) |
Abbreviations: CT, computed tomography; LAA, low attenuation area; CCVW, clustered cysts with visible walls; GGAR, ground-glass attenuation with/without reticulation; DICN, diffuse ill-defined centrilobular nodules.