Airway pressure release ventilation during acute hypoxemic respiratory failure: a systematic review and meta-analysis of randomized controlled trials

Annals of Intensive Care

Table 2 Quality assessment of the included studies

	Random-sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective reporting	Other bias
Putensen et al. [13]	?	?	–	?	+	?	–
Varpula et al. [10]	?	+	–	?	+	?	?
Li et al. [12]	?	?	–	?	+	?	?
Zhou et al. [11]	+	+	–	?	+	+	+
Hirshberg et al. [16]	+	+	–	?	+	+	+