Table 5.
Characteristics of studies of HBV infection and ECC risk.
| Authors | Year | Country | Cases (n) | Controls (n) | 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.