Table 3.

Follow-Up and Recurrence By Drainage Pattern^a

Outcome	Total n = 1772	IM Drainage n = 334	No IM Drainage n = 1438	P Value
Follow-up time, y				0.001
Mean	7.4	8.0	7.3
Median	7.4	7.7	7.3
Range	1–12.1	1–12	1–12.1
Systemic recurrence				0.10b
Yes	90 (5.1)	23 (6.9)	67 (4.7)
No	1682 (94.9)	311 (93.1)	1371 (95.3)
Local recurrence				0.04b
Yes	49 (2.8)	15 (4.5)	34 (2.4)
No	1723 (97.2)	319 (95.5)	1404 (97.6)
Regional recurrence				0.10b
Yes	33 (1.9)	10 (3.0)	23 (1.6)
No	1739 (98.1)	324 (97.0)	1415 (98.4)

IM indicates internal mammary; XRT, external beam radiation therapy.

^aData are number of patients (%) unless otherwise indicated.

^bFisher exact test.