With the support of NRC-IRAP, and in direct collaboration with senior surgeons at the Toronto Western Hospital, OAISYS is completing data collection and the analysis of 400 TKA cases all of whom have had WOMAC scores and Preoperative radiographs graded using the UCOAG scheme. The data will help to define the Severity Index of cases having had surgery, based on their combined Disability and Xray grading scores. This data will help support the development of standards for surgical decision making.  (More information coming soon).