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

Table 2

Characteristics of studies of HBV infection and CCA risk.

Authors	Year	Country	Cases ()	Controls ()	Control description	Adjusted OR (95% CI)	Study quality	Reference
Lee et al.	2015	Korea	276	552	Hospital-based control	4.12; (2.01–8.44)	7	[32]
Zhou et al.	2014	China	126	504	Hospital-based control	19.245; (13.260–27.931)	7	[33]
Li et al.	2014	China	183	549	Hospital-based control	NR	8	[34]
Chang et al.	2013	China (Taiwan)	5157	8716	Population-based control	NR	9	[35]
Peng et al.	2011	China	98	196	Hospital-based control	2.75; (1.27–5.95)	8	[36]
Cai et al.	2011	China	313	608	Hospital-based control	NR	7	[37]
Srivatanakul et al.	2010	Thailand	106	106	Population-based control	NR	6	[38]
Zhou et al.	2010	China	317	634	Hospital-based control	9.669; (6.329–14.77)	8	[39]
Tao et al.	2010	China	190	380	Hospital-based control	NR	8	[40]
Lee et al.	2009	China (Taiwan)	160	160	Hospital-based control	4.985; (2.775–8.945)	6	[41]
Zhou et al.	2008	China	312	438	Hospital-based control	8.876; (5.973–13.192)	6	[42]
Hsing et al.	2008	China	134	762	Population-based control	NR	8	[43]
Lee et al.	2008	Korea	622	2488	Hospital-based control	2.3; (1.6–3.3)	7	[44]
Yamamoto et al.	2004	Japan	50	200	Hospital-based control	NR	6	[45]

NR: not reported.