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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)