RESULTS	In the treatment group , 1 , 3 , 5 year disease-free survival rates were 95.7 % , 86.7 % and 54.5 % ; and in control group , the corresponding disease-free survival rates were 93.3 % , 66.2 % and 38.6 % , respectively , the difference being statistically significant ( log-rank = 5.887 , p = 0.015 ) .\