Epidemiology Study in Major Orthopaedic Surgery

The purpose of this study is to: * Create a database including a description of the patient population that undergoes total hip replacement with special emphasis on orthopedic and cardiovascular complications and the quality of life 1 year postoperatively. * Characterise the patient at risk for the above mentioned events * Create methods for predicting patients at risk for short-term (90 days) and long term (1 year) complications in relation to hip replacement surgery.