This 2021 network meta-analysis by Dai et al. evaluated the impact of leukocyte concentration in platelet-rich plasma (PRP) injections on clinical outcomes for knee osteoarthritis (OA). The study analyzed data from 30 randomized controlled trials encompassing 2,662 patients, comparing leukocyte-rich PRP (LR-PRP), leukocyte-poor PRP (LP-PRP), and placebo. Results indicated that
