 Several other associations between patient characteristics and the chance to achieve clinically importance improvements to TJR surgery have been identified as age, gender, body mass index, ethnicity, psychological distress, co-morbidity-profile and radiographic osteoarthritis severity. It can be speculated that while fast-track surgery aid to early recovery, the number of falls within the population of patients undergoing total lower limb arthroplasty will increase as a result from increased, early activities. Jørgensen Kehlet found the overall incidence of falls postoperatively in hip and knee replacements to be low, the inclusion of fall history may be important to optimize the rehabilitation protocol and reduce future risk of falls in this group of patients. 