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Table 4 Distribution of different DCIS grades by year and screening status

From: The distribution of ductal carcinoma in situ (DCIS) grade in 4232 women and its impact on overdiagnosis in breast cancer screening

  

Detected at mass screening

Screen negative

P value

  

N

%

N

%

 

Year

      

2007

 

410

 

19

  
 

Low-grade DCIS

59

14.4 %

3

15.8 %

 
 

Intermediate-grade DCIS

109

26.6 %

2

10.5 %

0.083

 

High-grade DCIS

242

59.0 %

14

73.7 %

 

2008

 

525

 

58

  
 

Low-grade DCIS

91

17.3 %

11

19.0 %

 
 

Intermediate-grade DCIS

167

31.8 %

15

25.9 %

0.827

 

High-grade DCIS

267

50.9 %

32

55.2 %

 

2009

 

495

 

186

  
 

Low-grade DCIS

84

17.0 %

35

18.8 %

 
 

Intermediate-grade DCIS

176

35.6 %

56

30.1 %

0.651

 

High-grade DCIS

235

47.5 %

95

51.1 %

 
  1. The P values indicate the significance of the difference of these distributions between screening status. Low-grade DCIS: DCIS with a low malignant potential. Intermediate-grade DCIS: DCIS with an intermediate malignant potential. High-grade DCIS: DCIS with a high malignant potential
  2. DCIS ductal carcinoma in situ
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Breast Cancer Research

ISSN: 1465-542X

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