Demographic data of the entire study population
| Characteristics | Value |
| Age (year)* | 61 (54–69) |
| Sex | |
| Male | 174 (42.4) |
| Female | 236 (57.6) |
| Pathology | |
| AAH | 17 (4.1) |
| AIS | 51 (12.4) |
| MIA | 52 (12.7) |
| IPA | 290 (70.7) |
| Nodule type | |
| Pure GGN | 101 (24.6) |
| Part-solid nodule | 309 (75.4) |
| Family history of lung cancer | |
| Yes | 16 (3.9) |
| No | 394 (96.1) |
| Emphysema | |
| Yes | 44 (10.7) |
| No | 366 (89.3) |
| Nodule size (mm)* | 15.8 (11.8–20.9) |
| Solid portion size (mm)* | 5.7 (1.6–11.2) |
| Solid proportion (%)* | 41.0 (11.4–62.0) |
| Location | |
| Upper lobe | 249 (60.7) |
| Other lobes | 161 (39.3) |
| Lobulation | |
| Yes | 138 (33.7) |
| No | 272 (66.3) |
| Spiculation | |
| Yes | 134 (32.6) |
| No | 276 (67.3) |
| Nodule count per scan* | 3 (1–5) |
Unless otherwise specified, data are numbers of patients (with percentages in parentheses).
*Data are median (with IQR in parentheses).
AAH, atypical adenomatous hyperplasia; AIS, adenocarcinoma-in-situ; GGN, ground-glass nodule; IPA, invasive pulmonary adenocarcinoma; MIA, minimally invasive adenocarcinoma.