. 2018 Dec 12;14:393. doi: 10.1186/s12917-018-1715-6

Table 1.

Association of different variables in the seroprevalence of brucellosis in ovine and caprine in China

	Variables	No. studies	No. samples	No. Positive	Rate (%) (95% CI)	Heterogeneity			Regression analysis
	Variables	No. studies	No. samples	No. Positive	Rate (%) (95% CI)	χ²	P-value	I² (%)	(95% CI)	P-value
Region	Northeast China*	2	2651	211	5.60 (0–12.10)	46.10	0.000	97.8%	0.0001(0.0000–0.0084)	0.000
	Northern China	3	846,759	3663	3.20 (0–6.60)	84.81	0.000	97.6%
	Northwest China	42	644,113	13,592	1.40 (1.00–1.80)	8545.14	0.000	99.6%
	Eastern China	4	1066	130	7.00 (0–17.40)	106.33	0.000	98.1%
	Southern China	3	6296	129	2.00 (0.50–3.60)	17.10	0.000	94.2%
	Central China	2	1796	30	1.90 (0–3.80)	6.39	0.012	84.3%
Sampling year	Southwest China	10	132,061	3814	5.30 (3.60–7.10)	1286.40	0.000	99.5%	0.0001(0.0000–0.0001)	0.000
	2010–2018	47	1,474,801	19,540	3.20 (2.70–3.60)	11,402.65	0.000	99.7%
	2000–2009	24	159,941	2029	1.00 (0.70–1.30)	1367.24	0.000	98.4%
Method	SAT	48	1,607,691	21,115	2.20 (1.90–2.50)	12,495.11	0.000	99.7%	0.0001(0.0001–0.0002)	0.000
Method	RBPT	18	27,051	454	2.80 (1.90–3.80)	219.96	0.000	95.5%	0.0001(0.0001–0.0002)	0.000
Species	Goat	28	188,687	4246	3.50 (2.80–4.10)	2835.30	0.000	99.3%	0.0001(0.0001–0.0002)	0.000
Species	Sheep	45	1,446,055	17,323	1.80 (1.50–2.20)	9705.32	0.000	99.6%	0.0001(0.0001–0.0002)	0.000
	Total	66	1,634,742	21,569	2.30 (2.00–2.60)	12,732.79	0.000	99.6%	0.0001	0.000

CI Confidence interval, SAT Serum agglutination test, RBPT Rose Bengal plate test

*Northeast China: Heilongjiang, Jilin, Liaoning; Northern China: Inner Mongolia, Shanxi, Hebei, Beijing, Tianjin; Northwest China: Xinjiang, Qinghai, Gansu, Ningxia, Shaanxi; Eastern China: Shandong, Anhui, Jiangxi, Jiangsu, Zhejiang, Shanghai, Fujian; Southern China: Guangxi, Guangdong, Shenzhen, Hainan, Macao, Hong Kong; Central China: Henan, Hunan, Hubei; Southwest China: Tibet, Yunnan, Guizhou, Sichuan, Chongqing