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| Sex (female/male) | 11∶11 |
| Age (y, median) | 72 |
| Lesion size (cm) | |
| Mean ± SD | 1.4±0.6 |
| Range | 0.5–3.0 |
| Previous lung cancer resection | 12 (57%) |
| Patients with more than one lesion | 9 (43%) |
| ECOG PS score | |
| 0 | 10 |
| 1 | 12 |
| Charlson comorbidity score | |
| Mean ± SD | 5.0±2.9 |
| Range | 3–15 |
| Clinical stage | |
| T1aN0 | 29 |
| T1bN0 | 5 |
| Histologic type | |
| Squamous | 2 |
| Adenocarcinoma | 30 |
| Large cell carcinoma | 1 |
| Non-small cell lung carcinoma | 1 |
| Subsolid nodules | 12 |
