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Table 3 Prognosis of patients with persistent PT at RT end with and without boost irradiation

From: Primary tumor regression speed after radiotherapy and its prognostic significance in nasopharyngeal carcinoma: a retrospective study

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
  1. 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.