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Table 4 Percent of observed agreement and chance-corrected agreement (weighted kappa values) of histopathological evaluation (five level B-categorization) according to percent of mammographic density

From: Mammographic density and inter-observer variability of pathologic evaluation of core biopsies among women with mammographic abnormalities

Percent density

N

Agreement (95% CI)

  

Observed

Kappa

<10%

242

87.6 (82.8-91.5)

89.6 (85.8-93.3)

10% to <25%

181

86.2 (80.3-90.9)

88.2 (83.5-92.8)

25% to <50%

186

83.3 (77.2-88.4)

86.4 (81.6-91.2)

≥50%

86

82.6 (72.9-89.9)

80.4 (69.9-90.9)

Overall

695

85.5 (82.6-88.0)

87.9 (85.5-90.3)

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BMC Cancer

ISSN: 1471-2407

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