Table 3.
Prognosis of patients with persistent PT at RT end with and without boost irradiation
| Variable | Without boost irradiation (N = 27) | With boost irradiation (N = 85) | HR † (95% CI*) | P ‡ |
|---|---|---|---|---|
| 5-yr OS rate |
65.5% |
63.9% |
1.308 (0.622-2.748) |
0.477 |
| 5-yr FFS rate |
73.1% |
67.7% |
1.267 (0.547-2.934) |
0.579 |
| 5-yr DMFS rate |
84.4% |
79.2% |
1.350 (0.451-4.039) |
0.589 |
| 5-yr LRFS rate | 87.1% | 84.6% | 1.170 (0.322-4.252) | 0.812 |
†HR, Hazard ratios calculated using the unadjusted Cox proportional hazards model; *CI, confidence interval; ‡P-values were calculated by the unadjusted log-rank test. PT, Primary tumor; RT, Radiotherapy; OS, Overall survival; FFS, Failure-free survival; DMFS, Distant metastasis-free survival; LRFS, Local relapse-free survival.