Table II.
Clinicopathologic characteristics of the study population.
| Category | Diagnostic group (n=139) | Non-diagnostic group (n=59) | P-value |
|---|---|---|---|
| Sex | 0.44 | ||
| Male, n (%) | 72 (36.4) | 27 (13.6) | |
| Female, n (%) | 67 (33.8) | 32 (16.2) | |
| Mean age + SD, years | 61.09±10.87 | 60.22±9.20 | 0.59 |
| History of malignancy | 0.50 | ||
| Yes, n (%) | 8 (4.0) | 4 (2.0) | |
| No, n (%) | 131 (66.2) | 55 (27.8) | |
| Pathology results | 0.19 | ||
| Benign, n (%) | 20 (10.1) | 13 (6.6) | |
| Malignancy, n (%) | 119 (60.1) | 46 (23.2) | |
| Median nodule size, cm (IQS) | 1.7 (1.2) | 1.4 (1.0) | <0.01 |
| Nodule type | <0.01 | ||
| Solid, n (%) | 66 (33.3) | 14 (7.0) | |
| Pure GGO, n (%) | 7 (3.5) | 11 (5.6) | |
| Mixed GGO, n (%) | 66 (33.3) | 34 (17.2) | |
| Median CT value, Hu (IQS) | −120 (−418) | −270 (−432) | <0.01 |
| Median distance from pleura, cm (IQS) | 0.80 (1.60) | 1.00 (1.70) | 0.12 |
| Pleural contact | 0.02 | ||
| Yes, n (%) | 57 (28.8) | 14 (7.1) | |
| No, n (%) | 82 (41.4) | 45 (22.7) | |
| Bronchus sign | 0.18 | ||
| Yes, n (%) | 7 (3.5) | 6 (3.0) | |
| No, n (%) | 132 (66.7) | 53 (26.8) | |
| Nodule position | 0.04 | ||
| Upper left lung, n (%) | 25 (12.6) | 20 (10.1) | |
| Lower left lung, n (%) | 17 (8.6) | 10 (5.1) | |
| Upper right lung, n (%) | 55 (27.8) | 14 (7.1) | |
| Middle lung, n (%) | 18 (9.1) | 4 (2.0) | |
| Right lower lung, n (%) | 24 (12.1) | 11 (5.6) |
GGO, ground-glass opacity; IQS, interquartile spacing.