Table 2 Assessment of potential bias in enrolled studies.
Year | First author | Bias in selection of cases | Bias in selection of controls | Bias in genotyping controls | Bias in population stratification | Confounding bias | Multiple test and Selective outcome reports |
|---|---|---|---|---|---|---|---|
2011 | Liu et al. | NO | NO | NO | NO | NO | NO |
2012 | Lv et al. | NO | NO | NO | NO | NO | NO |
2013 | Kim et al. | NO | NO | NO | NO | NO | NO |
2007 | Yang et al. | NO | NO | NO | NO | NO | NO |
2012 | Boteva et al. | NO | NO | NO | NO | NO | NO |
2015 | Cleynen et al. | NO | NO | NO | NO | NO | NO |
2014 | Hou et al. | NO | NO | NO | NO | NO | NO |
2012 | Rigby et al. | NO | NO | NO | NO | NO | NO |
2016 | Pereira et al. | NO | NO | NO | NO | NO | NO |
2013 | Hou et al. | NO | NO | NO | NO | NO | NO |
2016 | Lintner et al. | NO | NO | NO | NO | NO | NO |
2016 | Chen et al. | NO | NO | NO | NO | NO | NO |
