Intraoperative mechanical ventilation strategies in patients undergoing one-lung ventilation: a meta-analysis

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Table 2 Risk of bias in included studies

Author	Year	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective reporting	Other bias
Randomized parallel study
Hu et al.	2014	Low	High	Low	Low	Unclear	Unclear	Low
Qutub et al.	2014	Unclear	Unclear	Low	Low	Low	Low	Low
Jung et al.	2014	Low	High	Low	Low	Unclear	Unclear	Low
Shen et al.	2013	Low	Unclear	Low	Unclear	Low	High	Low
Maslow et al.	2013	Unclear	Unclear	Low	Unclear	Low	Unclear	Low
Yang et al.	2011	Low	Low	Low	Low	Low	Unclear	Low
Ye and Li	2011	Unclear	Unclear	Low	Low	Unclear	Unclear	Low
Boules and Ghobrial	2011	Low	Unclear	Low	Unclear	Unclear	Unclear	Low
Pardos et al.	2009	Unclear	High	Low	Unclear	Unclear	Unclear	Low
Lin et al.	2008	Unclear	Unclear	Low	Low	Unclear	Unclear	Low
Michelet et al.	2006	Low	Low	Low	Unclear	Low	Unclear	High
Randomized cross-over study
Song et al.	2014	Low	Unclear	Low	Low	Unclear	Unclear	Low
Pu et al.	2014	Unclear	Unclear	Low	Low	Unclear	Unclear	Low
Al Shehri et al.	2014	Low	Low	Low	Low	Unclear	Low	High
Végh et al.	2013	Low	Unclear	Low	Low	Unclear	Low	Low
Roze et al.	2012	Low	Unclear	Low	Low	Low	Low	Low
Sungur Ulke et al.	2011	Low	Unclear	Low	Low	Unclear	Unclear	Low
Montes et al.	2010	Low	Unclear	Low	Low	Low	Unclear	Low
Choi et al.	2009	Low	Unclear	Low	Low	Low	Unclear	Low
Unzueta et al.	2007	Low	Unclear	Low	Low	Low	Unclear	Low
Tugrul et al.	1997	Unclear	Unclear	Low	Low	Unclear	Unclear	Low