Table 3.

Survival analysis of surgery and non-surgery groups.

Characteristic	Surgery		Non-surgery		p-value
	5-year survival rate	Median (months)	5-year survival rate	Median (months)
Age:
Young (≤ 49 years)	0.138	15	0.026	6	< 0.001
Middle age (50–73 years)	0.123	12	0.027	5	< 0.001
Elderly (≥ 74 years)	0.115	8	0.006	2	< 0.001
Sex:
Female	0.103	12	0.017	4	< 0.001
Male	0.14	12	0.025	4	< 0.001
Race:
Black	0.152	14	0.014	4	<0.001
White	0.123	11	0.021	4	< 0.001
Other	0.129	13	0.031	4	< 0.001
Unknown	0.5	12	0.441	13	0.350
T stage:
T0	–	22	0.02	2	0.135
T1	0.197	14	0.02	4	< 0.001
T2	0.356	21	0.037	7	< 0.001
T3	0.178	15	0.038	7	< 0.001
T4	0.077	11	0.025	4	< 0.001
TX	0.049	10	0.014	4	< 0.001
N stage:
N0	0.291	17	0.026	4	< 0.001
N1	0.116	12	0.024	5	< 0.001
N2	0.078	12	0.035	6	< 0.001
N3	0.035	9	0.034	6	< 0.001
Unknown	0	7	0.010	3	0.006
Lymph node:
Resection	0.115	12	0.060	8	0.003
Biopsy	0.0375	11	0.018	6	0.043
None	0.111	10	0.022	4	< 0.001
Unknown	0	7	0	2	0.146
Chemotherapy:
Yes	0.136	16	0.029	8	< 0.001
No	0.106	4	0.012	1	< 0.001
Radiotherapy:
Yes	0.083	14	0.176	6	<0.001
No	0	2	0.05	1	0.975
Unknown	0.139	11	0.021	4	<0.001