Table 2.

The Clinical Characteristics of the Patients in the Database

Clinical	Group	n	Mean	SD	t	P
Age	>65	120	1.445	0.897	1.895582261	0.059
	≤65	222	1.265	0.71
Gender	Female	131	1.316	0.781	−0.221189375	0.825
	Male	211	1.336	0.788
Stage	1–2	188	1.299	0.746	−0.762915393	0.446
	3–4	154	1.364	0.83
T	0–2	128	1.079	0.659	−4.928465071	0
	3–4	214	1.477	0.816
M	0	331	1.329	0.792	0.205587713	0.841
	1	11	1.295	0.526
N	0	196	1.294	0.737	−0.909634201	0.364
	1–3	146	1.374	0.844