Table 2.

Reported outcomes of included studies

Study	Reported outcomes
	Intraop. Oxy.	Intraop. RC	Intra-op. MAP	PPCs
Almarakbi 2009 [20]	√	√		√
Chen 2022 [21]	√	√	√	√
Eichler 2017 [22]	√	√
Elshazly 2020 [23]	√	√	√	√
Elokda 2019 [24]	√		√	√
EI-Sayed 2012 [25]	√	√	√	√
Hecke 2019 [26]	√	√		√
Li 2023 [27]	√	√	√	√
Reinius 2009 [28]	√	√	√
Saxena 2017 [29]	√		√
Talab 2009 [30]			√	√
Wei 2018 [31]	√		√	√
Yang 2023 [32]		√	√	√

Intraop. = intraoperative; Oxy. = oxygenation; RC. = respiratory compliance; MAP, mean arterial pressure; PPCs, postoperative pulmonary complications