Table 4: Characteristics of studies of HBV infection and ICC risk.

AuthorsYearCountryCases ()Controls ()Control descriptionAdjusted OR (95% CI)Study qualityReference

Lee et al.2015Korea83166Hospital-based control5.27
(1.93–14.38)
7[32]
Li et al.2014China183549Hospital-based controlNR8[34]
Chang et al.2013China (Taiwan)297811912Population-based control3.5
(2.9–4.3)
9[35]
Wu et al.2012China102835Hospital-based controlNR7[47]
Peng et al.2011China98196Hospital-based control2.75
(1.27–5.95)
8[36]
Zhou et al.2010China317634Hospital-based control9.669
(6.329–14.77)
8[39]
Tao et al.2010China61380Hospital-based controlNR8[40]
Lee et al.2009China (Taiwan)160160Hospital-based control4.985
(2.775–8.945)
6[41]
Zhou et al.2008China312438Hospital-based control8.876
(5.973–13.192)
6[42]
Lee et al.2008Korea6222488Hospital-based control2.3
(1.6–3.3)
7[44]
Yamamoto et al.2004Japan50200Hospital-based controlNR6[45]

NR: not reported.