| Characteristic | No. of Patients | % |
|---|
| Sex |
| Male | 125 | 74.0 |
| Female | 44 | 26.0 |
| Age, years |
| Median | 58 | |
| Range | 28–78 | |
| Histology |
| SCLC | 55 | 32.5 |
| NSCLC | 114 | 67.5 |
| Stage |
| I- II | 24 | 10.2 |
| III-IV | 145 | 85.8 |
| KPS |
| 80–100 | 123 | 72.6 |
| < 80 | 46 | 27.4 |
| Smoking |
| Smoker | 106 | 62.0 |
| Non-smoker | 63 | 38.0 |
| Chemotherapy |
| Yes | 160 | 94.7 |
| No | 9 | 5.3 |
| CRT |
| Yes | 44 | 26.0 |
| No | 125 | 74.0 |
| Surgery |
| Yes | 86 | 50.9 |
| No | 83 | 49.1 |
| IMRT |
| Yes | 79 | 46.7 |
| No | 90 | 53.3 |
| Radiation dose (cGy) |
| Median | 5600 | |
| Range | 4500–6600 | |
| MLD (cGy) |
| Median | 1368 | |
| Range | 178–2017 | |
| V20 |
| Median | 24.82 | |
| Range | 0–42.00 | |
| COPD |
| Yes | 19 | 11.2 |
| No | 150 | 88.8 |
- Abbreviations: KPS Kamofsky performance status; CRT concurrent chemoradiation; IMRT intensity-modulated radiation therapy; MLD mean lung dose; V20 volume of normal lung receiving 20 Gy or more radiation; COPD chronic obstructive pulmonary disease
