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Table 2 Prognostic factors' distribution among women exposed to screening and non-screen-detected invasive breast cancers

From: Prognosis of screen-detected breast cancers: results of a population based study

Prognostic Factor

Exposed to screening n(%)

Non-screen-detected n(%)

p-value

Tumour size (mm.)

   

1–10

231 (48)

102 (24)

 

11–20

218 (45)

167 (39)

 

21–50

33 (7)

140 (32)

 

> 50

--

20 (5)

 

Mean Size

13

19

< 0.0001

Positive Nodal Status

93 (19)

165 (38)

< 0.0001

Positive Hormonal Status

403 (84)

313 (73)

< 0.05 (0.02)

Proliferative Activity

  

< 0.0001

LOW

343 (74)

236 (61)

 

HIGH

118 (26)

150 (39)

 

Grading

  

<0.0001

1

108 (25)

76 (21)

 

2

209 (49)

143 (40)

 

3

113 (26)

142 (39)