69 Systematic review and meta-analysis of randomised controlled trials and cohort studies of risk factors for knee osteoarthritis after trauma (OPTIKNEE) by Linda Truong, Marienke van Middelkoop, Jackie L Whittaker, Carsten Juhl, Ewa Roos, Maxi Miciak, Kay Crossley, Adam Culvenor, Justin Losciale, Jonas Thorlund, Matilde Lundberg, Belle van Meer, L Stefan Lohmander