Table 4.

Cross-tabulation of quartiles of absolute amount of density by quartiles of relative amount of density

Absolute amount of density
Range*Q1Q2Q3Q4Total
Relative amount of densityQ1 (0-12%)0.3-32.3861910106
Q2 (12-24%)8.5-65.21563272107
Q3 (25-42%)8.5-91.5320433197
Q4 (43-90%)17.9-138063270108
Total104108103103418
Range within quartile, cm20.3-15.215.2-26.526.7-46.446.5-138
Corresponding range, %0-336-6011-9020-88
• * Range of the absolute amount of dense tissue (in cm2) corresponding to the quartile of relative density.

• Range of the absolute amount of density (in cm2) within each quartile.

• Range of the relative amount of density (in %) corresponding to the quartile of absolute amount of density.