Table 2.

Levels of serum miRNAs (mean ± SD), PG (median ± SD) between different gastric disease groups

Variables		CON	AG	GC	P-value
miR-20a-5p		3.77 ± 0.74	3.84 ± 0.69	3.83 ± 0.68	0.581
	Male	3.80 ± 0.77	3.90 ± 0.73	3.88 ± 0.78	0.59
	Female	3.72 ± 0.69	3.73 ± 0.60	3.75 ± 0.47	0.855
let-7a		3.72 ± 0.34	3.77 ± 0.29	3.75 ± 0.28	0.445
	Male	3.72 ± 0.31	3.78 ± 0.32	3.77 ± 0.28	0.367
	Female	3.71 ± 0.39	3.76 ± 0.24	3.72 ± 0.28	0.93
miR-320a		4.99 ± 0.46	4.94 ± 0.45	4.90 ± 0.44	0.152
	Male	5.03 ± 0.49	5.01 ± 0.46	5.00 ± 0.42	0.76
	Female	4.93 ± 0.40	4.81 ± 0.39	4.73 ± 0.43	0.035*
PGA		146.3 ± 101.5	111.0 ± 85.4	130.1 ± 107.1	0.044§
PGC		19.2 ± 17.6	14.0 ± 12.2	23.1 ± 23.0	0.003§
PGA/PGC		9.52 ± 4.85	9.52 ± 5.23	7.86 ± 5.46	0.039§

P^*:GC vs Control; P^§:difference among the three groups. CON: Cases with minimal superficial gastritis were treated as the controls; AG: atrophic gastritis; GC: gastric cancer.