HBV Infection Status and the Risk of Cholangiocarcinoma in Asia: A Meta-Analysis

Table 5

Characteristics of studies of HBV infection and ECC risk.

Authors	Year	Country	Cases ()	Controls ()	Control description	Adjusted OR (95% CI)	Study quality	Reference
Lee et al.	2015	Korea	193	386	Hospital-based control	NR	7	[32]
Chang et al.	2013	China (Taiwan)	2179	8716	Population-based control	2.6 (2.0–3.4)	9	[35]
Zhou et al.	2013	China	239	478	Hospital-based control	NR	7	[15]
Wu et al.	2012	China	86	835	Hospital-based control	NR	7	[47]
Tao et al.	2010	China	129	380	Hospital-based control	NR	8	[40]
Hsing et al.	2008	China	134	762	Population-based control	NR	8	[43]

NR: not reported.