Table 3.

Risk of subsequent breast events among women diagnosed with DCIS by breast density groups

Breast densityAny invasive cancer (n = 133)
Ipsilateral invasive cancer (n = 83)
Contralateral invasive cancer (n = 52)
Contralateral DCIS (n = 30)
HR* (95% CI)HR* (95% CI)HR (95% CI)HR (95% CI)
Low (BI-RADS 1, 2)1.001.001.001.00
High (BI-RADS 3, 4)1.4 (0.9-2.1)1.0 (0.6-1.6)3.1 (1.6-6.1)1.5 (0.6-3.3)
  • * Adjusted for age and radiation status.

  • Adjusted for age.