Table 2.

Subsequent breast events among women diagnosed with DCIS by breast density group

Breast density groupAny invasive cancer, n (col%)Ipsilateral invasive cancer, n (col%)Contralateral invasive cancer, n (col%)Contralateral DCIS, n (col%)
Low (BI-RADS 1, 2)52 (39%)39 (47%)13 (25%)11 (37%)
High (BI-RADS 3, 4)81* (61%)44 (53%)39 (75%)19 (63%)
Total133*835230
  • * Includes two patients with bilateral invasive breast cancer.