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Table 3 Inter-observer agreement on the Tabár classification

From: Inter-observer agreement according to three methods of evaluating mammographic density and parenchymal pattern in a case control study: impact on relative risk of breast cancer

 

Reader 2

Reader 1

PI

PII

PIII

PIV

PV

Total

High/low-risk

PI

107

(227)

2

(4)

5

(11)

7

(22)

5

(24)

126

(288)

245; 64%

PII

20

(47)

81

(191)

4

(8)

0

(0)

0

(0)

105

(246)

(561; 73%)

PIII

6

(8)

2

(3)

5

(15)

1

(1)

0

(0)

14

(27)

 

PIV

26

(42)

0

(0)

0

(0)

76

(108)

17

(24)

119

(174)

139; 36%

PV

1

(1)

0

(0)

0

(0)

1

(0)

18

(29)

20

(30)

(204; 27%)

Total

160

(325)

85

(198)

14

(34)

85

(131)

40

(77)

384

(765)

P<0.0001

High/low-risk

259; 67%

(557; 73%)

 

125; 33%

(208; 27%)

  

Agreement

Women (%)

Breasts (%)

  

Absolute agreement:

74.7

74.5

    

PI/PII disagreement:

5.7

6.7

    

PI/PIII disagreement:

2.9

2.5

    

PI/PIV disagreement:

8.6

8.4

    

PI/PV disagreement:

1.6

3.3

    

PII/PIII disagreement:

1.6

1.4

    

PII/PIV disagreement:

0

0

    

PII/PV disagreement:

0

0

    

PIII/PIV disagreement:

0.3

0.1

    

PIII/PV disagreement :

0

0

    

PIV/PV disagreement :

4.7

3.1

    

High/low-risk agreement :

89.6

88.2

    
  1. Based on 384 women (breasts are shown in brackets; n=765).
  2. Numbers in boldface indicate agreement between the two readers.
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BMC Cancer

ISSN: 1471-2407

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