Table 2. Parameter of included studies in the meta-analysis.

Author	Year	Sample size (case/control)	Total	Index	TP	FP	FN	TN	Sensitivity (%)	Specificity (%)
Gao [18]	2012	76/96	173	DCP	57	2	19	94	75	97
Liu [19]	2012	66/60	126	DCP	58	3	8	57	88	95
Li [20]	2013	198/414	612	DCP	139	82	59	332	70	80
Song [21]	2014	550/85	635	DCP	393	10	157	75	71	88
Pu [22]	2014	100/265	365	DCP	74	27	26	238	74	89
Zhu [23]	2014	136/192	328	DCP	115	18	21	174	84	90
Fu [24]	2015	100/100	200	DCP	76	11	24	89	76	88
Lin [8]	2015	100/190	290	DCP	94	21	6	169	94	88
Yu [25]	2016	45/138	183	DCP	26	10	19	128	58	92
Shen [16]	2016	103/156	259	DCP	72	11	31	145	70	92
Zheng [26]	2016	70/150	220	DCP	63	4	7	146	90	97
Huang [17]	2016	100/281	381	DCP	80	20	20	261	80	93
Lu [27]	2016	82/95	177	DCP	59	32	23	63	72	66
Huang [28]	2016	80/188	268	DCP	72	28	8	160	90	85
Liu [19]	2012	66/60	126	AFP + DCP	66	22	0	38	100	63
Li [20]	2013	198/414	612	AFP + DCP	172	97	26	317	87	76
Song [21]	2014	550/85	635	AFP + DCP	456	13	94	72	82	84
Pu [22]	2014	100/265	365	AFP + DCP	81	63	19	202	81	76
Zhu [23]	2014	136/192	328	AFP + DCP	126	20	10	172	92	89
Fu [24]	2015	100/100	200	AFP + DCP	61	1	39	99	61	99
Lin [8]	2015	100/190	290	AFP + DCP	98	39	2	151	98	79
Yu [25]	2016	45/138	183	AFP + DCP	40	20	5	118	88	85
Shen [16]	2016	103/156	259	AFP + DCP	87	18	16	138	84	88
Zheng [26]	2016	70/150	220	AFP + DCP	67	53	3	97	95	64
Huang [17]	2016	100/281	381	AFP + DCP	90	24	10	257	90	91
Huang [28]	2016	80/188	268	AFP + DCP	78	82	2	106	97	56