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Demographic and clinical characteristics
| Gender, n (%) | |
|---|---|
| Male | 165 (45.2%) |
| Female | 200 (54.8%) |
| Age | |
| Years, mean (SD) | 58.7 (12.7) |
| Tumor type, n (%) | |
| Lung | 177 (48.5%) |
| Breast | 76 (20.8%) |
| Gastrointestinal | 23 (6.3%) |
| Leukemia | 17 (4.7%) |
| Lymphoma | 16 (4.4%) |
| Other tumors | 56 (15.3%) |
| Fluid appearance, n (%) | |
| Non-bloody | 206 (56.4%) |
| Bloody | 159 (43.6%) |
| Cytology, n (%) | |
| Positive | 301 (82.5%) |
| Negative | 64 (17.5%) |
