Source

Sequence generation

Allocation concealment

Blinding of participants

Incomplete outcome data

Selective outcome reporting

Other sources of bias

Batik et al., 2008 [19]

Unclear

Unclear

Unclear

No

Yes

No

Belalcazar et al., 2010 [20]

Unclear

Unclear

Unclear

Yes

Yes

Unclear

Christian et al., 2008 [21]

Unclear

Unclear

No

Yes

Yes

Unclear

De Greef et al., 2011 [22]

Yes

Yes

No

No

Yes

No

Debussche et al., 2012 [23]

Yes

Unclear

Unclear

Yes

Yes

Unclear

Di Loreto et al., 2003 [14]

Unclear

Unclear

Unclear

Yes

Yes

Unclear

Eakin et al., 2010 [24]

Unclear

Unclear

Unclear

Yes

Yes

Unclear

Eakin et al., 2009 [25]

Unclear

Unclear

Unclear

Yes

Yes

Unclear

Eakin et al., 2014 [26]

Yes

Unclear

Unclear

Yes

Yes

No

Eakin et al., 2013 [27]

Yes

Unclear

Unclear

Yes

Yes

No

Fowles et al., 2014 [28]

No

No

No

Yes

Yes

No

Fowles et al., 2014 [29]

No

No

No

Yes

Yes

No

Gregg et al., 2012 [30]

Unclear

Unclear

Unclear

Yes

Yes

Unclear

Kang et al., 2010 [31]

Unclear

Unclear

Unclear

Yes

Yes

No

Kirk et al., 2009 [32]

Yes

Yes

Yes

Yes

Yes

Unclear

Kirk et al., 2004 [33]

Yes

Yes

Unclear

Yes

Yes

Yes

Kirk et al., 2004 [34]

Yes

Yes

Unclear

Yes

Yes

Yes

Look ahead group, 2014 [35]

Unclear

Unclear

Unclear

Yes

Yes

Yes

Plotnikoff et al., 2013 [36]

Yes

Yes

Unclear

Yes

Yes

Unclear

Plotnikoff et al., 2011 [37]

Yes

Unclear

Unclear

Yes

Yes

Unclear

Plotnikoff et al., 2010 [38]

Unclear

Unclear

Unclear

Yes

Yes

No

Wadden et al., 2009 [39]

Unclear

Unclear

Unclear

Yes

Yes

Yes

Yoo et al., 2007 [40]

Unclear

Unclear

Unclear

Yes

Yes

No

% Yes

39.1

21.7

4.3

91.3

100

17.4

% No

8.7

8.7

17.4

8.7

-

39.1

% Unclear

52.2

69.6

78.3

-

-

43.5