Table 2.

Comparison of clinical characteristics between the 2 groups based on risk characteristics.

Subgroup	Total	Age		Gender		Stage		T		M		N
High	84	≤65	29	Female	38	I	18	T1	1	M0	72	N0	49
		>65	55	Male	46	II	30	T2	17	M1	12	N1	20
						III	24	T3	59	M2	–	N2	15
						IV	12	T4	7	M3	–	N3	–
Low	85	≤65	40	Female	44	I	16	T1	3	M0	67	N0	48
		>65	45	Male	41	II	29	T2	16	M1	18	N1	21
						III	22	T3	59	M2	–	N2	16
						IV	18	T4	7	M3	–	N3	–