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Table 5 Bivariate study for high/low risk classification among scales

From: Evaluation of mammographic density patterns: reproducibility and concordance among scales

Percentage of total agreement; Kappa statistics (95% CI)

Scale

 

Wolfe

Tabár

BI-RADS

Boyd

Wolfe

% Agreement:

92.55%*

90.37%

75.22%

75.25%

 

Kappa (95% CI):

0.851 (0.798-0.904)*

0.804 (0.785-0.823)

0.485 (0.460-0.510)

0.485 (0.460-0.511)

Tabár

% Agreement:

90.37%

90.16%*

84.46%

84.49%

 

Kappa (95% CI):

0.804 (0.785-0.823)

0.800 (0.739-0.861)*

0.638 (0.612-0.663)

0.638 (0.612-0.664)

BI-RAD

% Agreement:

75.22%

84.46%

93.35% *

99.97%

 

Kappa (95% CI):

0.485 (0.460-0.510)

0.638 (0.612-0.663)

0.815 (0.746-0.885)*

0.999 (0.998-1.000)

Boyd

% Agreement:

75.25%

84.49%

99.97%

93.62%*

 

Kappa (95% CI):

0.485 (0.460-0.511)

0.638 (0.612-0.664)

0.999 (0.998-1.000)

0.822 (0.754-0.891)*

  1. *Data drawn from intra-observer agreement study (sub-sample of 320 mammograms)