“…Observational ( Athar et al, 2007 ; Bartels et al, 2021 ; Bilen et al, 2017 ; Billingsley et al, 2015 ; Cheng et al, 2014 ; Eckstrom et al, 2019 ; Gupta et al, 2007 ; Hoffmann, 2005 ; Ibrahim et al, 2011 ; Karol et al, 2013 ; Kumar et al, 2009 ; Lokich, 2005 ; Lokich, 2006 ; Matera et al, 2017 ; McBride et al, 2021 ; Micha et al, 2013 ; Schuman et al, 2009 ; Skarlos et al, 2009 ; Vance & Carpenter, 2006 ; Weycker et al, 2017 ; Whitworth et al, 2009 ; Woods et al, 2010 ) and randomized studies ( Burris et al, 2010 ; Siefker-Radtke et al, 2016 ) have evaluated the extent of prophylaxis provided by a single dose of pegfilgrastim administered within the first 24 hours after completion of chemotherapy. Here, we present a meta-analysis of studies comparing the efficacy of same-day pegfilgrastim to the standard protocol of administration > 24 hours following completion of chemotherapy (next-day).…”