Table 1.

Characteristics of the study population

No subsequent invasive eventSubsequent invasive eventSubsequent contralateral DCIS
Mean age at diagnosis, y (range)58 (30-93)59 (34-90)55 (34-83)
Median months of follow-up (range)39 (0-132)29 (2-109)26 (3-70)
Positive family history21%26%28%
Radiation treatment47%43%28%
High grade34%37%33%
White race83%77%90%
  • NOTE: Invasive events include both ipsilateral and contralateral breast cancers. Ipsilateral DCIS recurrence data was not available.