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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