Document Classification

Section Type: RESULTS

Text: After a median follow up of 6. 0 years (IQR 5. 0-6. 2) the rate of local-regional tumour relapse at 5 years was 2. 2 % (95 % CI 1. 3-3. 1) in the 40 Gy group and 3. 3 % (95 % CI 2. 2 to 4. 5) in the 50 Gy group, representing an absolute difference of -0. 7 % (95 % CI -1. 7 % to 0. 9 %) -- ie, the absolute difference in local-regional relapse could be up to 1. 7 % better and at most 1 % worse after 40 Gy than after 50 Gy.