Table 2.

The GC-risk related gut microbiota identified by the ROC analysis.

The different bacterial taxa	The original population				The matching population
	Relative abundance (%)		Z(P)	AUC (95% CI)	Relative abundance (%)		Z(P)	AUC (95% CI)
	Cases (n = 134)	Controls (n = 58)			Cases (n = 44)	Controls (n = 44)
g_Veillonella	2.25 ± 3.57	0.78 ± 3.76	7.409 (0.000)	0.837 (0.772, 0.902)	2.18 ± 3.97	0.37 ± 1.45	5.741 (0.000)	0.855 (0.773, 0.937)
s_Streptococcus mitis	0.37 ± 0.74	0.26 ± 1.13	5.583 (0.000)	0.754 (0.679, 0.829)	0.29 ± 0.52	0.33 ± 1.29	3.541 (0.000)	0.719 (0.610, 0.828)
g_Megasphaera	0.94 ± 4.29	0.03 ± 0.11	5.458 (0.000)	0.743 (0.670, 0.815)	0.73 ± 3.10	0.04 ± 0.13	4.097 (0.000)	0.745 (0.640, 0.849)
s_Streptococcus salivarius subsp. salivarius	2.77 ± 3.29	1.26 ± 4.14	5.231 (0.000)	0.738 (0.663, 0.813)	2.79 ± 3.54	1.50 ± 4.72	3.843 (0.000)	0.738 (0.633, 0.842)
s_Bifidobacterium dentium	0.08 ± 0.23	0.02 ± 0.08	4.787 (0.000)	0.705 (0.629, 0.781)	0.06 ± 0.10	0.01 ± 0.06	4.238 (0.000)	0.741 (0.635, 0.848)
s_Lactobacillus salivarius	0.92 ± 1.88	0.08 ± 0.24	4.418 (0.000)	0.695 (0.621, 0.769)	0.84 ± 1.77	0.06 ± 0.21	3.452 (0.001)	0.705 (0.594, 0.815)
g_Prevotella 7	0.44 ± 1.73	0.02 ± 0.10	4.591 (0.000)	0.694 (0.618, 0.771)	0.30 ± 0.73	0.01 ± 0.07	4.201 (0.000)	0.739 (0.635, 0.844)