Table 1

Clinical and pathological characteristics of patients from the training and validation sets

Training

Validation

Characteristics

n = 142

n = 279

n (%)

n (%)


Age

<40

9 (6.4)

20 (7.2)

40 – 49

18 (12.8)

74 (26.5)

50 – 59

28 (19.9)

77 (27.6)

60 – 69

48 (34.0)

73 (26.2)

≥ 70

38 (27.0)

35 (12.5)

Missing

1

0

Median

64 yrs (SD 12.6)

55 yrs (SD 11.7)

Min. – Max.

31 – 89 yrs

29 – 87 yrs

Tumor diameter

≤ 2 cm

126 (94.0)

168 (60.2)

> 2 cm

8 (6.0)

111 (39.8)

Missing

8

0

Median

1.2 cm (SD 0.50)

2 cm (SD 0.85)

Min. – Max.

0.3 – 2.9 cm

0.0* – 3.0 cm

Tumor grade

Grade 1

74 (53.2)

60 (21.5)

Grade 2

61 (43.9)

166 (59.5)

Grade 3

4 (2.9)

53 (19.0)

Missing

3

0

Stage

I

126 (94.0)

168 (60.2)

IIA

8 (6.0)

111 (39.8)

Missing

8

0

HER2

Negative

na

251 (93.0)

Positive

na

19 (7.0)

Missing

9

Surgery

Breast conserving

na

112 (40.1)

Mastectomy

na

167 (59.9)

Radiotherapy

Yes

na

115 (39.7)

No

na

175 (60.3)

Distant recurrence

Yes

31 (21.8)

71 (25.5)

No

111 (78.2)

208 (74.6)

Death of all cause

Yes

56 (39.4)

134 (48.0)

No

86 (60.6)

145 (52.0)

Median follow up

8.7 yrs

15.6 yrs


*tumors were impalpable

Tutt et al. BMC Cancer 2008 8:339   doi:10.1186/1471-2407-8-339

Open Data