With a median follow-up of 7.95 years ( range : 1.66-10 .08 years ) for surviving patients and 3.33 years for all patients ( range : 0.03-10 .08 years ) , the 5-year estimate of local-regional failure was 46.2 % versus 39.4 % ( P = .42 ) , local-regional progression-free survival was 31.5 % versus 37.6 % ( P = .20 ) , and overall survival was 36.9 % versus 38.2 % ( P = .54 ) for the RT+EPO and RT arms , respectively .