Table 1. Patient characteristics between groups according to main treatment (N=8,879).

Patient characteristics	Main treatment, No. of patients (%)		P value
	Radiation therapy (N=4,883)	Surgery (N=3,996)
Sex			0.534
Male	4,532 (92.8)	3,694 (92.4)
Female	351 (7.2)	302 (7.6)
Age, year			<0.001
Mean ± SD	66.4±9.7	64.1±8.6
Mental disorder			<0.001
Yes	317 (6.5)	352 (8.8)
No	4,566 (93.5)	3,644 (91.2)