Table 3 Assessment of risk of bias in individual studies
From: Meta-analysis of ART outcomes in women with different preconception TSH levels
Study | Selection bias | Performance bias | Detection bias | Attrition bias | Reporting bias | Other bias | |
|---|---|---|---|---|---|---|---|
Sampling bias | Measurement bias | ||||||
Coelho 2016 | – | + | – | – | – | ? | – |
Aghahosseini 2013 | – | – | ? | – | + | – | – |
Mintziori 2014 | + | – | + | – | – | – | + |
Unuane 2017 | + | – | – | – | – | + | + |
Michalakis 2011 | + | ? | + | – | – | ? | + |
Muller 1999 | – | + | – | + | – | ? | – |
Chai 2014 | + | + | – | – | – | – | + |
Weghofer 2015 | – | ? | + | + | – | ? | + |
Baker 2006 | ? | – | + | – | + | – | – |
Karmon 2014 | – | ? | – | – | + | – | – |
Cai 2017 | – | – | ? | – | – | ? | + |
Seungdamrong 2017 | – | – | – | + | – | – | + |
Zhang 2012 | – | + | – | + | – | – | + |
Ba 2013 | + | – | ? | – | – | – | – |
Reh 2010 | – | + | + | – | + | ? | + |
Zeng 2014 | ? | – | + | – | – | ? | – |
Gingold 2016 | ? | – | + | – | – | – | + |
Wu 2017 | – | ? | + | – | + | – | – |