Table 2. Radiological characteristics of benign and malignant fGGOs before and after PSM.
| Characteristic | Before PSM |
After PSM |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| All (n = 128) | Benign (n = 51) | Malignant (n = 77) | P | All (n = 82) | Benign (n = 41) | Malignant (n = 41) | P | |||
| Size of fGGOs, mm | 21.5† (range: 5–45) | 16.0† (range: 5–45) | 26.0† (range: 8–45) | 0.001 | 20.0† (range: 5–45) | 16.0† (range: 5–45) | 22.0† (range: 8–45) | 0.160 | ||
| GGO numbers | 0.194 | 0.547 | ||||||||
| Solitary | 110 | 85.9% | 41 | 69 | 69 | 84.1% | 33 | 36 | ||
| Multiple | 18 | 14.1% | 10 | 8 | 13 | 15.9% | 8 | 5 | ||
| GGO type | <0.001 | 1.000 | ||||||||
| Pure GGO without a dominant lesion(s) | 43 | 33.6% | 31 | 12 | 42 | 51.2% | 21 | 21 | ||
| Dominant nodule(s) with part-solid component | 85 | 66.4% | 20 | 65 | 40 | 48.8% | 20 | 20 | ||
| Cavitation | 0.062 | 0.116 | ||||||||
| Present | 17 | 13.3% | 3 | 14 | 12 | 14.6% | 3 | 9 | ||
| Absent | 111 | 86.7% | 48 | 63 | 70 | 85.4% | 38 | 32 | ||
| Spiculation | 0.017 | 0.262 | ||||||||
| Present | 52 | 40.6% | 14 | 38 | 34 | 41.5% | 14 | 20 | ||
| Absent | 76 | 59.4% | 37 | 39 | 48 | 58.5% | 27 | 21 | ||
| Calcification | 0.275 | 0.241 | ||||||||
| Present | 3 | 2.3% | 0 | 3 | 3 | 3.7% | 0 | 3 | ||
| Absent | 125 | 97.7% | 51 | 74 | 79 | 96.3% | 41 | 38 | ||
fGGOs: focal Ground-glass Opacity.
PSM: propensity score matching.
†Values are given as the median.