Table 1

Breast density changea

CriteriaAverageSDRangeP
Wolfe−0.030.4−1.0 to 1.50.5
BI-RADS−0.10.4−1.5 to 0.50.12
Semiquanitative−0.20.5−1.2 to 0.80.039
Digitized−4.3%6.60%−21.5 to 10.1%0.0007
  • a The values are calculated per year. The unit for the Wolfe, BI-RADS, and semiquantitative scales is one category.