Ductal Carcinoma In Situ of the Breast

Table 2

NSABP B17: ipsilateral breast tumor recurrence.

NSABP B-17	Number of events	Rate/1000 patient/year	Relative risk	𝑃 value
Noninvasive
Lumpectomy alone	62	14.7	0.47	<0.001
Lumpectomy + RT	37	7.5
Invasive
Lumpectomy alone	79	18.8	0.52	<0.001
Lumpectomy + RT	44	9.0