Table 2.

Mean levels of different peptides among healthy controls, pre-operative GC patients and post-operative GC patients

Peaks	Mass (Da)	P value	Control	Pre-	Post-
1	1265.49↑	0.000145	2.44 ± 0.5	12.34 ± 4.66	9.93 ± 4.13
2	1352.84↑	0.000111	6.73 ± 2.91	31.8 ± 10.48	23.07 ± 11.08
3	1406.85↑	0.00222	3.98 ± 1.68	7.2 ± 2.49	5.57 ± 1.86
4	1506.07↑	0.00000893	2.09 ± 0.46	15.42 ± 4.85	11.60 ± 3.14
5	1521.93↑	< 0.000001	2.41 ± 0.43	38.66 ± 9.47	28.69 ± 8.36
6	1539.22↑	< 0.000001	3.71 ± 0.78	24.13 ± 10.59	11.03 ± 6.02
7	1575.90↑	0.000251	2.02 ± 0.44	15.66 ± 5.49	10.17 ± 3.96
8	1629.81↑	< 0.000001	2.02 ± 0.53	6.13 ± 2.7	4.24 ± 1.51
9	2663.12↓	0.0000226	6.81 ± 2.05	2.53 ± 1.12	6.07 ± 3.45
10	2716.91↓	0.0000935	3.46 ± 0.72	1.55 ± 0.4	2.53 ± 0.9
11	2865.39↓	< 0.000001	4.3 ± 1.54	1.71 ± 0.58	3.42 ± 2.87
12	4213.82↓	< 0.000001	3.64 ± 0.73	1.61 ± 0.98	2.96 ± 1.36