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Table 2 The basic characteristics of studies included in the meta-analysis

From: Timing of norepinephrine initiation in patients with septic shock: a systematic review and meta-analysis

Author Year Country Study period Study design No. of patients
Total Early group Late group
Bai et al. [24] 2014 China Jan. 2011–Dec. 2012 Single center, retrospective cohort study 213 86 127
Permpikul et al. [29] 2019 Thailand Oct. 2013–Mar. 2017 Single center, RCT 310 155 155
Elbouhy et al. [30] 2019 Egypt Jan. 2017–Dec. 2018 Single center, RCT 101 57 44
Colon Hidalgo et al. [25] 2020 USA Jan. 2017–Jul. 2017 Single center, retrospective cohort study 119 76 43
Ospina-Tascón et al. [26] 2020 Colombia Jan. 2015–Feb. 2017 Single center, prospective cohort study 186 93 93