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Table 3 Cross-tabulations of numbers of mammograms according to risk categories for breast cancer, comparing concordance among scales of mammographic density patterns - [Garrido-Estepa et al. 2010]

From: The agreement chart

   (A) Wolfe classification scale   (B) Tabár classification scale
   Second measure   Second measure
   N1 P1 P2 DY Total   II III IV V Total   
First measure N1 12 9 0 0 21 II 12 9 0 0 21   
  P1 4 139 13 5 161 III 4 170 16 8 198   
  P2 0 7 101 14 122 IV 0 4 114 6 124   
  DY 0 2 13 56 71 V 0 8 9 15 32   
  Total 16 157 127 75 375 Total 16 191 139 29 375   
   (C) BI-RADS classification scale (D) Boyd classification scale
   Second measure    Second measure  
   AEF SFD HD ED Total   A B C D E F Total
First measure AEF 147 13 0 0 160 A 6 4 0 0 0 0 10
  SFD 14 101 10 0 125 B 4 56 11 0 0 0 71
  HD 0 14 48 6 68 C 0 16 50 13 0 0 79
  ED 0 0 3 19 22 D 0 0 14 102 9 0 125
  Total 161 128 61 25 375 E 0 0 0 14 48 6 68
        F 0 0 0 0 3 19 22
        Total 10 76 75 129 60 25 375
  1. (A) Wolfe:
  2. Low-risk categories:
  3. N1: Breast composed almost completely of fat, with perhaps just a few fibrous connective tissue strands.
  4. P1: Breast composed mainly of fat, although up to a quarter of the sub-areolar area may show beaded or cord-like areas corresponding to prominent ducts.
  5. High risk categories:
  6. P2: More severe involvement of the breast, with a prominent duct pattern occupying more than one quarter of breast volume.
  7. DY: Breast typically contains extensive regions of homogeneous mammographic densities, which appear as sheet-like regions. The proportion of density is greater than that of the fat.
  8. (B) Tabár:
  9. Low risk categories:
  10. I: Mammogram composed of scalloped contours with some lucent areas of fatty replacement and 1 mm evenly distributed nodular densities.
  11. II: Mammogram composed almost entirely of lucent areas of fatty replacement and 1-mm evenly distributed nodular densities.
  12. III: Prominent ducts in the retroareolar area.
  13. High risk categories:
  14. IV: Extensive, nodular and linear densities with nodular size larger than normal lobules.
  15. V: Homogeneous ground-glass-like appearance with no perceptible features.
  16. (C) BI-RADS:
  17. Low risk categories:
  18. Almost entirely fat: 0-25%.
  19. Scattered fibroglandular densities: > 25-50%.
  20. High risk categories:
  21. Heterogeneously dense: > 50-75%.
  22. Extremely dense: > 75%.
  23. (D) Boyd:
  24. Low risk categories:
  25. A: 0%.
  26. B: > 0-10*%.
  27. C: 10-25*%.
  28. D: 25-50*%.
  29. High risk categories:
  30. E: 50-75*%.
  31. F: ≥75%.
  32. *Upper bound excluded.