[Retracted] The Efficacy and Safety of Budesonide/Glycopyrronium/Formoterol in the Treatment of COPD in the Elderly

Table 1

Basic characteristics of included studies.

Study year	Country	Ethnicity	Cases	Gender (M/F)
Darken 2018	USA	America	160	81/79
Ichinose 2019	Sweden	Europe	277	139/138
Ichinose-2 2019	Sweden	Europe	1277	139/138
Maes 2017	USA	America	130	64/66
Martinez-1 2021	USA	America	322	170/152
Muro 2021	Japan	East Asia	1264	639/625
Wang 2020	China	East Asia	288	144/144