Table 3.
statistical comparison of the dosemetric parameters between patients with and without G≥2 radiation pneumonitis
| Patients with RP≥2 (need clinical interventions) |
Patients with RP<2 or no RP (do not need clinical interventions) |
p-value | |
|---|---|---|---|
| Patients (n) | 50 | 68 | N/A |
| Primary tumor dose (median) | 28.6-70 (60.8) | 22-70 (61.6) | 0.3403 |
| MLD (median) | 14.6-1800.5 (1117.0) | 12.1-1900.4 (1200.1) | 0.2154 |
| V30 (median) | 2.02-22.27 (11.93) | 2.00-23.05 (12.89) | 0.4908 |
| V20 (median) | 2.00-30.00 (19.99) | 6.02-30.54 (19.90) | 0.7315 |
| V10 (median) | 4-59.96 (34.45) | 14-55(33.47) | 0.8831 |
| V5 (median) | 12.75-86 (50.07) | 3-86(53.43) | 0.8424 |
| Fractional dose (median) | 2.00-4.67 (2.40) | 2.00-7.00 (2.45) | 0.02936 |
MLD= mean lung dose in cGy; V30, V20, V10, V5= the percentage of the lung volume (with subtraction of the volume involved by lung cancer) which receives radiation doses of 30, 20, 10, 5 Gy or more.