491 / 1778
Wiltink et al, J Clin Oncol 2015
No. at risk
No RT 1008 708 496
84
2
EBRT 1332 862 482
83
1
VBT 214 157 8
-
-
No RT
EBRT
VBT
PORTEC&TME
N>2500
Competing risk
analysis
<60 yrs by treatment
Second cancers by age
Risk of second cancers