Table 2. Comparison between pure and mixed GGNs.
| Parameter | Total | Pure GGN | Mixed GGN | P value |
|---|---|---|---|---|
| Number of lesions | 370 | 257 | 113 | – |
| Diameter (mm) | 11.3±5.8 | 10.5±5.6 | 13.2±6.0 | <0.0001 |
| Depth (mm) | 8.1±9.2 | 7.8±9.1 | 8.8±9.4 | 0.53 |
| Anatomical distribution (%) | – | |||
| RUL | 108 (29.2) | 71 (27.6) | 37 (32.7) | |
| RML | 21 (5.7) | 18 (7.0) | 3 (2.7) | |
| RLL | 92 (24.9) | 63 (24.5) | 29 (25/7) | |
| LUL | 87 (23.5) | 57 (22.2) | 30 (26.5) | |
| LLL | 62 (16.8) | 48 (18.7) | 14 (12.4) | |
| GGO% (mean) | 100 | 46.6±30.0 | – | |
| GGO ≥75% | – | – | 29 (25.7) | |
| 50%≤ GGO <75% | – | – | 41 (36.3) | |
| 25%≤ GGO <50% | – | – | 29 (25.7) | |
| GGO <25% | – | – | 14 (12.4) |
GGN, ground glass nodule; RUL, right upper lobe; RML, right middle lobe; RLL, right lower lobe; LUL, left upper lobe; LLL, left lower lobe; GGO, ground glass opacity.