470 / 1778
15-year outcomes PORTEC-1
Failure Free Survival
RT
no RT
Logrank
N
354
360
F
156
157
P =0.94
RT
no RT
At risk:
354
360
282
274
229
227
59
61
RT
no RT
0
25
50
75
100
years
0
5
10
15
Cumulative percentage
Treatment arm
Failure free survival - all
RT
no RT
Logrank
N
354
360
F
15
50
P <.001
RT
no RT
At risk:
354
360
285
277
231
228
59
62
RT
no RT
0
10
20
30
years
0
5
10
15
Treatment arm
Locoregional relapse - all
Locoregional Recurrence
Creutzberg et al, ASTRO 2009, IJROBP 2011