Table 1.
Clinical and treatment characteristics of NSCLC patients treated with SBRT
| Variables | Level | Number | Percentage (%) |
|---|---|---|---|
| Gender | Female | 43 | 46.7 |
| Male | 49 | 53.3 | |
| TNM stage | IA | 65 | 70.7 |
| IB | 23 | 25.0 | |
| IIA | 4 | 4.3 | |
| T stage | 1A | 34 | 37.0 |
| 1B | 31 | 33.7 | |
| 2A | 23 | 25.0 | |
| 2B | 4 | 4.3 | |
| Smokera | No | 64 | 71.1 |
| Yes | 26 | 28.9 | |
| Pack‐years smokinga | < = 43 | 22 | 25.3 |
| 44–79 | 41 | 47.1 | |
| > = 80 | 24 | 27.6 | |
| O2 dependencea | No | 65 | 72.2 |
| Yes | 25 | 27.8 | |
| ECOG performance status | 0 | 21 | 22.8 |
| 1 | 49 | 53.3 | |
| 2 | 21 | 22.8 | |
| 3 | 1 | 1.1 | |
| Dose and fractions | 50 Gy in 5 fractions | 82 | 89.1 |
| 48 Gy in 4 fractions | 4 | 4.3 | |
| 60 Gy in 5 or 8 fractions | 6 | 6.5 | |
| Pathology | Adenocarcinoma | 36 | 39.1 |
| Squamous cell carcinoma | 33 | 35.9 | |
| NSCLC, nonspecified | 20 | 21.7 | |
| Large cell carcinoma | 3 | 3.3 |
ECOG, Eastern Cooperative Oncology Group; NSCLC, nonsmall cell lung cancer.
a
The pack‐years smoking history cannot be determined in 5 cases and 2 of them cannot be identified as smoker or nonsmoker. The O2 dependence information cannot be confirmed in 2 subjects.