Table 3.

Survival between Treatment Groups by Patient, Tumor, and Treatment Characteristics

	No. of Patients, (%)		Overall Survival, Median, mo			5-year Survival, Percent
	Observation	Adjuvant CRT	Observation	Adjuvant CRT	P-value	Observation	Adjuvant CRT
ALL PATIENTS	120 (64.5)	66 (35.5)	39.9	40.1	0.839	37.2	42.1
Age, yrs
< 75	79 (57.7)	58 (42.3)	41.3	40.6	0.913	37.9	45.9
≥ 75	41 (83.7)	8 (16.3)	35.5	33.3	0.939	36.0	25.0
Gender
Female	54 (70.1)	23 (20.9)	42.7	32.1	0.162	40.8	29.3
Male	66 (60.6)	43 (39.4)	32.2	46.0	0.238	33.9	48.4
Institution
Mayo	63 (76.8)	19 (23.2)	38.2	62.4	0.599	35.5	51.3
Hopkins	57 (54.8)	47 (45.2)	41.7	36.5	0.890	40.0	37.0
Histology
Grade 1/2	60 (70.6)	25 (29.4)	53.6	62.2	0.328	47.1	56.6
Grade 3	60 (59.4)	41 (40.6)	34.9	27.1	0.985	27.5	34.1
Node
Negative	84 (82.4)	18 (17.7)	61.6	103.2	0.122	52.4	87.1
Positive	36 (42.9)	48 (57.1)	15.7	32.1	0.004	5.9	27.5
Tumor Stage
T1/T2	83 (74.8)	28 (25.2)	41.3	87.5	0.172	41.7	56.8
T3/T4	37 (49.3)	38 (50.7)	27.0	25.0	0.873	27.5	28.7
Tumor Size
≤ 3 cm	81 (67.5)	39 (32.5)	41.3	36.5	0.797	38.8	40.0
> 3 cm	39 (59.1)	27 (40.9)	27.0	40.6	0.496	33.9	44.0
Margin status
Negative	120 (65.6)	63 (34.4)	40.1	39.9	0.754	37.2	42.7
Positive	0 (0.0)	3 (100.0)	N/A	33.3	N/A	N/A	33.3

*CRT = chemoradiation