Table 3.

Estimated pooled prevalence of Clinical mastitis by provincial regions in China.

Province	No. studies	Region	No. tested	No. positive	Prevalence %	% (95% CI)
Anhui (55)	1	Eastern	301	25	8	(5–11)
Beijing (66)	1	Northern	144	7	5	(1–8)
Chongqing (54)	1	Southwestern	118	10	8	(3–13)
Gansu (53, 59)	2	Northwestern	695	38	5	(4–7)
Guizhou (58)	1	Southwestern	175	58	33	(26–40)
Guangdong (12)	1	Southern	387	135	35	(30–40)
Hebei (60, 68)	2	Northern	2,050	157	7	(−1–15)
Heilongjiang (39, 44, 45, 47, 53, 57, 79, 80)	8	Northeastern	11,415	1,699	13	(10–17)
Henan (41, 42, 53, 56, 71)	5	Central	25,565	1,881	8	(5–11)
Inner Mongolia (43, 70)	2	Northern	2,590	161	6	(5–7)
Jilin (10, 65, 76)	3	Northeastern	33,767	3,623	11	(8–14)
Jiangxi (50, 53)	2	Eastern	737	56	8	(0–16)
Jiangsu (64)	1	Eastern	1,000	116	12	(10–14)
Ningxia (46, 61)	2	Northwestern	62,480	1,453	8	(−4 to 19)
Qinghai (48)	1	Northwestern	2,029	87	4	(3–5)
Shandong (40, 53, 69, 72, 75, 77)	6	Eastern	2,292	185	8	(5–11)
Shanxi (11, 67)	2	Northwestern	25,987	3,328	9	(−1 to 18)
Sichuan (38, 49, 53)	3	Southwestern	1,197	97	6	(5–8)
Shanghai (73)	1	Eastern	1,382	48	3	(3–4)
Tianjin (51, 78)	2	Northern	2,442	251	12	(7–16)
Xinjiang (37, 52, 62, 63, 74)	5	Northwestern	6,468	529	8	(6–11)