Table 2 Assessment of potential bias in included 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 |
|---|---|---|---|---|---|---|---|
2007 | Yate et al. [54] | NO | NO | NO | NO | NO | NO |
2007 | Maller et al. [41] | NO | NO | NO | NO | NO | NO |
2008 | Edwards et al. [31] | NO | NO | NO | NO | NO | NO |
2008 | Spencer et al. [50] | NO | NO | NO | NO | NO | NO |
2009 | Scholl et al. [4] | NO | NO | NO | NO | NO | NO |
2009 | Francis et al. [32] | NO | NO | NO | NO | NO | NO |
2009 | Park et al. [44] | NO | NO | NO | NO | NO | NO |
2009 | Despriet et al. [30] | NO | NO | NO | NO | NO | NO |
2009 | Bergeron et al. [22] | NO | NO | NO | NO | NO | NO |
2009 | Reynolds et al. [47] | NO | NO | NO | NO | NO | NO |
2009 | Pei et al. [45] | NO | NO | NO | NO | NO | NO |
2010 | Cui et al. [29] | NO | NO | NO | NO | NO | NO |
2010 | Zerbib et al. [56] | NO | NO | NO | NO | NO | NO |
2010 | McKay et al. [43] | NO | NO | NO | NO | NO | NO |
2010 | Chen et al. [25] | NO | NO | NO | NO | NO | NO |
2010 | Kopplin et al. [37] | NO | NO | NO | Unclear | NO | NO |
2010 | Liu et al. [39] | NO | NO | NO | NO | NO | NO |
2011 | Yu et al. [55] | NO | NO | NO | NO | NO | NO |
2011 | Chen et al. [26] | NO | NO | NO | NO | NO | NO |
2011 | Hageman et al. [33] | NO | NO | NO | Unclear | NO | NO |
2011 | Peter et al. [46] | Yes | NO | NO | Unclear | NO | NO |
2011 | Yanagisawa et al. [53] | NO | NO | NO | NO | NO | NO |
2012 | Martinez et al. [42] | NO | NO | NO | NO | NO | NO |
2012 | Smailhodzic et al. [49] | NO | NO | NO | NO | NO | NO |
2012 | Buentello et al. [23] | NO | NO | NO | NO | NO | NO |
2012 | Tian et al. [51] | NO | NO | NO | NO | NO | NO |
2012 | Losonczy et al. [40] | NO | NO | NO | NO | NO | NO |
2012 | Cipriani et al. [27] | NO | Yes | NO | NO | NO | NO |
2012 | Jaouni et al. [36] | NO | NO | NO | NO | NO | NO |
2013 | Wu et al. [52] | NO | NO | NO | NO | NO | NO |
2013 | Helgason et al. [35] | NO | NO | NO | NO | NO | NO |
2014 | Contreras et al. [28] | NO | NO | NO | NO | NO | NO |
2014 | Caire et al. [24] | NO | NO | NO | NO | NO | NO |
2014 | Liu et al. [38] | NO | NO | NO | NO | NO | NO |
2015 | Hautamaki et al. [34] | NO | NO | NO | NO | NO | NO |
2016 | Saksens et al. [48] | NO | NO | NO | NO | NO | NO |
2017 | NO | NO | NO | NO | NO | NO | |
2017 | Habibi et al. [57] | NO | NO | NO | NO | NO | NO |