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The characteristics of 241 patients who underwent surgical resection for an undiagnosed solitary lung nodule
| Malignant tumor (n = 203) | Benign disease (n = 38) | P | |
|---|---|---|---|
| Mean age | 68.6 | 65.3 | 0.029 |
| Male (%) | 122 (60) | 25 (66) | 0.509 |
| Smoker (%) | 132 (65) | 17 (45) | 0.018 |
| Past history of cancer (%) | 90 (44) | 12 (32) | 0.144 |
| Mean tumor diameter (mm) | 17.5 | 14.6 | 0.025 |
| Spicula (%) | 122 (60) | 11 (29) | <0.001 |
| Tumor in upper lobe (%) | 66 (33) | 18 (47) | 0.078 |
