Platelet‐rich plasma outcomes in knee osteoarthritis are associated with the amount of total deliverable platelets: A systematic review and meta‐analysis

When compared to HA, PRP with platelet counts between 1 and 10 billion total deliverable platelets may result in a larger decrease in pain symptoms when compared to platelet counts greater than 10 billion at 6 months. In addition, platelet counts between 5 and 10 billion total deliverable platelets may be associated with greater improvement in functional outcomes.