Table 1.

Clinical Characteristics of Two Groups in Risk Prediction Model

Factor	Categories	Risk Score		Total	p-value
		High	Low
Age (years)	≤50	16	19	35	0.591b
	>50	53	51	104
Gender	Male	49	43	92	0.232b
	Female	20	27	47
Vital status	Alive	12	14	26	0.693b
	Dead	57	56	113
Race	White	64	62	126	0.397b
	Other	5	8	13
Postoperative therapy	Yes	62	61	123	0.497c
	Partlya	2	5	7
	No	5	4	9

Notes: ^apartly=only received one therapy between radiotherapy and chemotherapy. ^bPearson’s chi-squared test. ^cMann–Whitney U-test.