Table 3.

Risk of Bias Within and Across Studies.

Studies	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective reporting
Full studies in alphabetical order (except where protocol and finding reports are grouped and had different first authors)
Bundy et al. (2011), Engelen et al. (2013)	?
Dopp et al. (2011), Döpp et al. (2014)	?	?
Eklund, Gunnarsson, Sandlund, and Leufstadius (2014)				?	?
Eyssen et al. (2013)					?
Law et al. (2007), Law et al. (2011)
Mozley et al. (2007)					?
Sackley et al. (2006)					?
Sackley et al. (2012), Sackley et al. (2015)
Taylor et al. (2012)				?
Wenborn et al. (2013)	?			?	?
Protocols
Barzel et al. (2013)	?
Killaspy et al. (2013)	?	?
McCluskey, et al. (2013)
Tokolahi, Hocking, Kersten, and Vandal (2014)

Note. ? = risk of bias unclear; = low risk of bias; = high risk of bias.