Table 2 Risk of bias assessment in the studies identified for meta-analysis
Study, year | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other bias |
|---|---|---|---|---|---|---|---|
Derosa, 2012a [20] | L | U | L | L | L | L | L |
Asahara, 2013 [21] | L | U | H | L | L | L | L |
Suzuki, 2014 [22] | L | U | H | H | L | L | L |
Liu, 2013 [23] | L | U | H | H | L | L | L |
Derosa, 2010 [24] | L | U | L | L | L | L | L |
Nakamura, 2014 [25] | L | U | U | U | L | L | L |
Derosas, 2012b [26] | L | U | L | L | L | L | L |
Strozik, 2014 [27] | L | L | U | U | L | L | L |
Zografou, 2015 [28] | L | U | U | U | L | L | L |
Derosa, 2014 [29] | L | U | L | L | L | L | L |
Kim, 2017 [30] | L | U | H | H | L | L | L |
Mita, 2015 [31] | L | U | H | L | L | L | L |
Boer, 2017 [32] | L | U | L | L | L | L | L |
Yamada, 2017 [33] | L | U | H | L | L | L | L |
Koren, 2012 [34] | L | U | H | H | L | L | L |
Nogueira, 2014 [35] | L | U | H | L | L | L | L |