Table 1. The characteristics of patients and tumors.
| Variables | M (QL, QU)/n (%) |
|---|---|
| No. | |
| Patients | 84 |
| Tumors | 148 |
| Age (years) | 56 (50, 64) |
| Tumor diameter (cm) | 1.71 (1.12, 2.30) |
| OTT of SBRT (days) | 15 (13, 22) |
| Fractions | 10 (10, 15) |
| Prescription BED10 (Gy) | 96.0 (84.0, 96.0) |
| BED10 of PTV mean dose (Gy) | 91.9 (88.1, 104.5) |
| BED10 of PTV D95 (Gy) | 85.7 (82.1, 96.3) |
| BED10 of PTV max dose (Gy) | 103.4 (94.9, 114.8) |
| BED10 of PTV min dose (Gy) | 75.6 (67.5, 85.8) |
| BED10 of PTV D99 (Gy) | 82.6 (78.1, 93.1) |
| GTV volume (cm3) | 6.0 (2.9, 16.1) |
| Sex | |
| Male | 52 (61.9) |
| Female | 32 (38.1) |
| Primary site | |
| Head and neck | 42 (28.4) |
| Esophageal | 39 (26.3) |
| Colorectal | 27 (18.2) |
| Cervical | 9 (6.1) |
| Breast | 9 (6.1) |
| Others | 22 (14.9) |
| Dose/fraction | |
| 60 Gy/15 f | 49 (33.1) |
| 60 Gy/10 f | 48 (32.4) |
| 70 Gy/10 f | 14 (9.5) |
| Others | 37 (25.0) |
| Histology | |
| Adenocarcinoma | 47 (31.8) |
| Squamous cell | 55 (37.2) |
| Other | 46 (31.1) |
| Chemotherapy prior to lung SBRT | |
| No | 46 (54.8) |
| Yes | 38 (45.2) |
| Lung metastasis | |
| 1 | 49 (58.3) |
| 2–3 | 29 (34.5) |
| 4–5 | 6 (7.2) |
| Extra thoracic metastasis | |
| No | 72 (85.7) |
| Yes | 12 (14.3) |
The data was shown as median (lower quartile, upper quartile) or number (percent). OTT, overall treatment time; SBRT, stereotactic body radiation therapy; BED, biological effective dose; PTV, planning target volume; GTV, gross tumor volume.