Characteristics of coexisting patellofemoral joint osteoarthritis and tibiofemoral joint osteoarthritis in an Indonesian population: A cross-sectional study at a tertiary teaching hospital

Introduction: Historically, the diagnosis and treatment of osteoarthritis has been focused on the tibiofemoral joint solely. For the last two decades, the role of patellofemoral joint and its involvement on the degenerative joint disease has been investigated. To date, no data existed regarding patellofemoral osteoarthritis in our country, Indonesia. Methods: We performed a cross sectional study comprising of patients diagnosed with knee osteoarthritis in Fatmawati General Hospital, a tertiary teaching hospital in Jakarta, Indonesia. The subjects underwent knee radiograph from anteroposterior, lateral and skyline views. Results: A total of 66 subjects were included, 80% of the subjects were diagnosed with combined patellofemoral and tibiofibular joint osteoarthritis Kellgren-Lawrence grade III-IV. The Western Ontario and McMaster Universities Osteoarthritis Index score was measured 69.3 points, as this might be correlated with the advancement of the disease. Conclusions: Combined patellofemoral and tibiofemoral osteoarthritis constitutes a large portion of patients with knee osteoarthitis. (C) 2019 The Authors. Published by Elsevier Ltd on behalf of Surgical Associates Ltd.