The combined 3-year disease-free survival for all stages was 74.2 % ( 95 % CI 70.4-78 .0 ) in the laparoscopic group and 76.2 % ( 72.6-79 .8 ) in the open-surgery group ( p = 0.70 by log-rank test ) ; the difference in disease-free survival after 3 years was 2.0 % ( 95 % CI -3.2 to 7.2 ) .
