Table 1.

Patient characteristics based on TNM classification and AJCC stage grouping

	Stage Grouping	PORT	Surgery alone	Total No. of Patients
T1-2N1	IIB	20	52	72
T1-2N2	IIIA	23	19	42
T3N1	IIIA	85	167	252
T3N2	IIIB	69	119	188
T4N1-3	IIIC	61	110	171
Total No. of Patients		258	467	725

TNM, tumor, node, metastases based classification; AJCC, American Joint Committee on Cancer; PORT, postoperative radiation therapy.