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Table 1 Description of the three samples used to develop (n =1067) and validate the model (n =3168 and n =31,075)

From: Validation of death prediction after breast cancer relapses using joint models

 

French cohort

West Midlands

Netherlands

 

(1989-1993)

(1996)

(2003-2006)

Variable

N=1067

%

N=1196

%

N=31075

%

Age

      

Age ≤40

82

7.7

73

6.1

2126

6.8

Age [40-55]

391

36.6

456

38.1

10681

34.4

Age >55

594

55.7

667

55.8

18268

58.8

Peritumoural vascular involvement

285

26.7

460

38.5

-

-

Tumour size > 20 mm

242

22.7

560

46.8

12365

39.8

Nodal involvement

451

42.3

496

41.5

12588

40.5

Grade

      

Grade I

316

29.6

226

18.9

6565

21.1

Grade II

488

45.7

526

44.0

13993

45.0

Grade III

263

24.6

444

37.1

10517

33.8

Number of recurrent events

None

705

 

895

 

27231

 

1

301

 

240

 

3834

 

2

57

 

49

 

10

 

3

4

 

10

 

0

 

4

0

 

2

 

0

 

5-year survival

89.1

(87.3-91.0)

76.6

(74.2-79.0)

85.5

(85.1-85.9)

10-year survival

77.1

(74.6-79.7)

63.1

(60.5-65.9)

-

 

15-year survival

65.4

(62.2-68.2)

51.6

(48.8-54.5)

-