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

Table 4

Characteristics of studies of HBV infection and ICC risk.

Authors	Year	Country	Cases ()	Controls ()	Control description	Adjusted OR (95% CI)	Study quality	Reference
Lee et al.	2015	Korea	83	166	Hospital-based control	5.27; (1.93–14.38)	7	[32]
Li et al.	2014	China	183	549	Hospital-based control	NR	8	[34]
Chang et al.	2013	China (Taiwan)	2978	11912	Population-based control	3.5; (2.9–4.3)	9	[35]
Wu et al.	2012	China	102	835	Hospital-based control	NR	7	[47]
Peng et al.	2011	China	98	196	Hospital-based control	2.75; (1.27–5.95)	8	[36]
Zhou et al.	2010	China	317	634	Hospital-based control	9.669; (6.329–14.77)	8	[39]
Tao et al.	2010	China	61	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]
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.