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Characteristics of study population
| Characteristic | n (%) |
|---|---|
| Total number of subjects | 156 |
| Subjects included in analysis | 132 |
| Sex | |
| Male | 73 (55%) |
| Female | 59 (45%) |
| Age (median/range) | 66 (21–90) |
| Etiology | |
| Benign | 51 (38.6%) |
| Malignant | 81 (61.4%) |
| Malignant nonepithelial | 14 (17.3%) |
| Malignant epithelial | 67 (82.7%) |
| Method of diagnosis | |
| Cytology | 55 (41.7%) |
| Clinical basis | 66 (50.0%) |
| Thoracoscopy | 11 (8.3%) |
