Table 1.
Demographic characteristics of 323 patients with 373 GGNs in two datasets.
| Characteristic | Training and validation dataset (N = 246) | Testing dataset (N = 127) | |||||
|---|---|---|---|---|---|---|---|
| Non-IA | IA | P | Non-IA | IA | P | ||
| 119 | 127 | 86 | 41 | ||||
| Sex | Male | 40 | 42 | 0.15 | 19 | 16 | 0.15 |
| Female | 73 | 74 | 43 | 16 | |||
| Age (mean ± SD, year) | 56.5 ± 11.8 | 59.7 ± 10.3 | 0.03 | 51.8 ± 12.1 | 58.1 ± 8.6 | 0.03 | |
| Location | RUL | 48 (19.5%) | 52 (21.1%) | 0.64 | 28 (22.0%) | 18 (14.2%) | 0.13 |
| RML | 6 (2.4%) | 9 (3.7%) | 6 (4.7%) | 3 (2.4%) | |||
| RLL | 17 (6.9%) | 19 (7.7%) | 15 (11.8%) | 7 (5.5%) | |||
| LUL | 34 (13.8%) | 32 (13.0%) | 25 (19.7%) | 7 (5.5%) | |||
| LLL | 14 (5.7%) | 15 (6.1%) | 12 (9.4%) | 6 (4.7%) | |||
| Diameter (mm) | (3, 10) | 72 (29.3%) | 42 (17.1%) | 0.004 | 67 (52.8%) | 8 (6.3%) | <0.0001 |
| (10, 20) | 39 (15.9%) | 68 (27.6%) | 19 (15.0%) | 22 (17.3%) | |||
| (20, 30) | 8 (3.3%) | 17 (6.9%) | 0 (0%) | 11 (8.7%) | |||
| Type | pGGN | 88 (35.8%) | 65 (26.4%) | 0.0002 | 78 (61.4%) | 18 (14.2%) | <0.0001 |
| sGGN | 31 (12.6%) | 62 (25.2%) | 8 (6.3%) | 23 (18.1%) | |||
IA, invasive adenocarcinoma; pGGO, pure ground glass nodule; sGGN, part-solid ground glass nodule.