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RT

no RT

Logrank

N

354

360

F

15

50

P <.001

RT

no RT

At risk:

354

360

284

276

199

209

48

42

RT

no RT

0

10

20

30

years

0

5

10

15

Treatment arm

I

II

III

ND

Logrank

N

395

88

86

145

F

28

9

15

13

P =0.006

I

II

III

ND

At risk:

395

88

86

145

323

74

52

111

242

49

39

78

64

9

5

12

I

II

III

ND

0

10

20

30

years

0

5

10

15

FIGO review grade

<1/2

>1/2

Logrank

N

294

420

F

19

46

P =0.04

<1/2

>1/2

At risk:

294

420

233

327

179

229

39

51

<1/2

>1/2

0

10

20

30

years

0

5

10

15

Invasion

<60

60-70

>70

Logrank

N

200

271

243

F

8

27

30

P =0.003

<60

60-70

>70

At risk:

200

271

243

182

211

167

146

165

97

32

41

17

<60

60-70

>70

0

10

20

30

years

0

5

10

15

Age

PORTEC Locoregional relapse

Creutzberg et al, ASTRO 2009, IJROBP 2011

PORTEC-1: risk factors for locoregional relapse