838ADVANCEMENT OF CLINICAL AND FUNCTIONAL OUTCOME IN OSTEOARTHRITIS KNEE AFTER PROXIMAL FIBULAR OSTEOTOMY IN DIABETES MELLITUS IN INDIAKnee osteoarthritis (OA), also known as degenerative joint disease, is typically the effect of wear and tear and progressive loss of articular cartilage leading to radiologically decreased joint space. Hence; under the light of above mentioned data, the present study was undertaken for advancement of clinical and functional outcome in osteoarthritis knee after proximal fibular osteotomy in diabetes mellitus in India. Material and methods: A total of 35 patients with OA of knee were included in our study. Usually the patients were placed in the supine position after administration of spinal anaesthesia. An approximately 5-cm longitudinal incision was made over the lateral aspect of the proximal fibula, and the fibula exposed among the peroneus muscle and soleus muscle. PFO was performed under the hands of skilled and experienced orthopaedic surgeon. Knee pain was assessed using a Visual analogue scale. Knee ambulation activities were recorded using the knee and function sub scores of the American Knee Society score (KSS). All the results were recorded in Microsoft excel sheet and were analyzed by SPSS software. Chi- square test and Mann Whitney U test were used for assessment of level of significance. Results: Mean KSS score at pre-operative, postoperative, postoperative 6 weeks and postoperative 9 months were found to be 43.04, 53.50, 67.11and68.14 respectively. Significant results were obtained while comparing the mean KSS at different postoperative time intervals. In current study, mean VAS score at pre-operative, postoperative, postoperative 6 weeks and postoperative 9 months were found to be 7.89, 4.74, 2.47and 1.52respectively. Significant results were obtained while comparing the mean VAS at different postoperative time intervals. Conclusion: PFO is an original alternative system in the administration of medial compartment arthritis of the kneedr.santhanakrishnan@gmail.comResearch7122016Proximal, Fibular, Osteoarthritis , high tibial osteotomy (HTO)Santhanakrishnan, Bobbly JamesAssistant Professor of Orthopaedics, Sri Lakshmi Narayana Institute of Medical Sciences, Puducherry affiliated to Bharath Institute of Higher Education and Research, Chennai,Professor of Orthopaedics, Sri Lakshmi Narayana Institute of Medical Sciences, Puducherry affiliated to Bharath Institute of Higher Education and Research, Chennai