Table 1 Characteristics of the SEARCH study cohort

Mean age (range)

52.6 (24 to 73)

Mean follow-up in years (range)

8.5 (0.37 to 18.6)

Number of breast cancer deaths (%)

563 (14)

Five-year survival %

90

Categories

Number

Percent

Grade

1

768

19

2

1, 622

39

3

1, 020

25

Missing

715

17

Node status

Negative

2, 309

56

Positive

1, 424

35

Missing

392

10

Tumour size

< 2 cm

2, 208

54

2 to 4.9 cm

1, 522

37

≥5 cm

145

4

Missing

250

6

Endocrine therapy

No

770

19

Yes

3, 315

80

Missing

40

1

Chemotherapy

No

2, 692

65

Yes

1, 392

34

Missing

41

1

ER status

Negative

772

19

Positive

2, 287

55

Missing

1, 066

26

PR status

Negative

889

22

Positive

2, 194

53

Missing

1, 042

25

HER2 status

Negative

2, 560

62

Positive

349

8

Missing

1, 216

29

Molecular subtype

Luminal 1a

1, 631

40

Luminal 1b

215

5

Luminal 2

202

5

HER2

120

3

CBP

214

5

5NP

130

3

Missing

1, 613

39