“…We subsequently excluded 77 articles for the following reasons: repetitive reporting, non-randomized studies, including children, or outcomes of interest not reported. Ultimately, we included 26 meta-analyses and two new RCTs ( Salkind et al, 2002 ; Mills et al, 2005 ; Shorr et al, 2005 ; Siempos et al, 2007 ; Vardakas et al, 2008 ; Liu et al, 2010 ; Cai et al, 2011 ; Eliakim-Raz et al, 2012 ; Lei et al, 2012 ; Yuan et al, 2012 ; Jiang et al, 2013 ; Skalsky et al, 2013 ; Garin et al, 2014 ; Pakhale et al, 2014 ; Qu et al, 2015 ; Raz-Pasteur et al, 2015 ; Shen et al, 2015 ; Arthur et al, 2016 ; Horita et al, 2016 ; Kalil et al, 2016 ; O’Donnell et al, 2018 ; Lan et al, 2019 ; Liu et al, 2019 ; Rui et al, 2019 ; Sweeney and Kalil, 2019 ; Wen et al, 2019 ; Zhang et al, 2019 ; Chen et al, 2020 ).The interventions evaluated in the meta-analyses included 31 types compared of antimicrobial therapy strategies: respiratory fluoroquinolones alone, macrolides alone, β-lactams alone, macrolides+β-lactams, respiratory fluoroquinolones+β-lactams, atypical antibiotic coverage, without atypical antibiotic coverage, tigecycline, sitafloxacin, vancomycin, linezolid, teicoplanin, carbapenems, doripenem, and adjunctive nebulized antibiotics. For the included study population, 14 meta-analyses focus on CAP, while as for nosocomial pneumonia, HAP, VAP, and pneumonia, there were 6, 1, 3, and 1 meta-analyses, respectively.…”