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Table 1 Characteristics of patients
| Number of Patients | |
|---|---|
| Age (year) | 71 (50~80) |
| Gender | |
| Male | 20 |
| Female | 11 |
| ECOG score | |
| 0/1 | 19/12 |
| Pathology | |
| SCC/Adno/ Unclassified/None | 7/14/4/6 |
| Primary tumor size, median (range) | 3.1 (1.1~4.7) cm |
| Primary tumor volume, median (range) | 19.39 (0.97~56.23) cm3 |
| Stage (AJCC staging v7) I/IIa | 21/10 |
| T1aN0M0 | 4 |
| T1bN0M0 | 7 |
| T2aN0M0 | 10 |
| T1aN1M0 | 1 |
| T1bN1M0 | 4 |
| T2aN1M0 | 5 |
| Tumor location | |
| Left/right lung | 9/22 |
| Upper/middle/lower lobe | 19/2/10 |
| Peripheral/median/central type-SPHIC institutional definition | 3/15/13 |
| Smoking history (packyears), median (range) | 15 (0~150) |
| Refusal of surgery | 8 |
| Medically inoperable | 23 |
