Table 1. Demographic data, nodule size and location of benign and malignant focal ground-glass opacity (fGGO).
| fGGO | Benign (n=21) | Malignant (n=61) | p-value |
| Sex ratio (M:F) | 12:9 | 23:38 | 0.120a |
| Average age (years) | 60.5±11.07 | 58.68±9.39 | 0.648b |
| Average size D (cm) | 2.33±0.71 | 2.36±0.73 | 0.955b |
| Location | |||
| RUL | 10 | 21 | 0.902c |
| RML | 2 | 7 | |
| RLL | 3 | 10 | |
| LUL | 4 | 13 | |
| LLL | 2 | 10 |
D, longest dimension; F, female; LLL, left lower lobe; LUL, left upper lobe; M, male; RLL, right lower lobe; RML, right middle lobe; RUL, right upper lobe.
Sex ratio and location are expressed in terms of frequency; age and size are expressed as mean±standard deviation.
aχ2 test.
bMann–Whitney U-test.
cFisher's exact test.