Clinical	Group	n	Mean	SD	t	P
age	≤65	213	1.125	0.512	1.1124	0.267
age	>65	223	1.074	0.432	1.1124	0.267
gender	Female	236	1.051	0.459	−2.3066	0.02
gender	Male	200	1.156	0.483	−2.3066	0.02
stage	Stage I - II	343	1.054	0.456	−3.7218	0
stage	Stage III - IV	93	1.266	0.496	−3.7218	0
T	T1-2	380	1.074	0.45	−2.3810	0.02
T	T3-4	56	1.268	0.584	−2.3810	0.02
N	N0	289	1.043	0.478	−3.6092	0
N	N1 - 3	147	1.21	0.444	−3.6092	0