Table 2.
Characteristics of studies of HBV infection and CCA risk.
| Authors | Year | Country | Cases (n) | Controls (n) | 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.