. 2015 May 28;10(5):e0128345. doi: 10.1371/journal.pone.0128345

Table 5. Use of radiotherapy in patients for whom radiation following breast-conserving surgery or mastectomy ^a should be indicated stratified by TNM stage.

N /%	Stage I			Stage II			Stage III
N /%	Young	Old-aged	p	Young	Old-aged	p	Young	Old-aged	p
Radiation			0.535			<0.001			<0.001
No	435/25.0	137/24.8		577/31.9	181/48.7		395/35.5	157/52.5
Yes	1303//75.0	416/75.2		1232/68.1	191/51.3		719/64.5	142/47.5
Total	1738/100	553/100		1809/100	372/100		1114/100	299/100

^a Patients for whom post-mastectomy radiotherapy should be indicated include those with≥4 positive lymph nodes or tumor size≥5cm.

Table 5. Use of radiotherapy in patients for whom radiation following breast-conserving surgery or mastectomy a should be indicated stratified by TNM stage.