Table 6. Survival analysis of radiographic-grouping by adjuvant radiotherapy.

Radiographic-grouping		Adjuvant radiotherapy (yes = 1, no = 2)	Patient number	Total	Chi-Square	P
Largest long diameter group	1	1	5	90	1.644	0.200
		2	85
	2	1	10	84	2.171	0.141
		2	74
	3	1	2	74	0.083	0.774
		2	72
	4	1	5	76	1.327	0.249
		2	71
CT lesion length group	1	1	8	97	0.358	0.550
		2	89
	2	1	9	88	3.415	0.065
		2	79
	3	1	3	73	0.001	0.980
		2	70
	4	1	2	66	0.606	0.436
		2	64
Max lesion area group	1	1	8	78	1.196	0.274
		2	70
	2	1	6	89	0.709	0.400
		2	83
	3	1	3	78	8.928	0.003
		2	75
	4	1	5	79	0.894	0.344
		2	74
	Total	324