Table 1.

Demographic Characteristics and Clinical Factors.

Characteristics		No. of Patients	5-Year OS			5-Year RFS
			Deaths, No.	Rate, % a	p b	Cases, No.	Rate, % a	p b
Age at diagnosis, y	≤60	19	2	88.9	0.048	3	84.2	0.21
	61–69	64	9	83.4		14	72.4
	70–79	81	15	78.7		12	81.4
	≥80	33	11	61.5		1	96.3
Sex, n	Male	102	23	74.3	0.18	17	77.5	0.48
	Female	95	14	83.2		13	84.0
Clinical stage, n	I	47	3	92.5	0.001	5	88.4	0.09
	II	86	13	82.4		11	82.0
	III	64	21	63.5		14	73.8
Chemotherapy, n	Yes	66	18	68.5	0.03	15	73.1	0.03
	No	131	19	83.7		15	85.0
Anatomic tumor location, n	Left	99	17	81.2	0.42	19	77.2	0.23
	Right	98	20	75.6		11	85.3

^a Survival rates were calculated by the Kaplan–Meier estimation method. ^b p value of Log–rank test.