Belford K, Gallagher N, Dempster M, et al. - A prospective study was conducted to assess the psychosocial factors that predicted pain, stiffness and physical functioning up to one year following total knee arthroplasty (TKA). Researchers included a total of 102 individuals who completed pre-operative and one-year questionnaires which evaluated a wide range of psychosocial and sociodemographic factors prior to surgery. They applied Oxford Knee Score and the Western Ontario and McMaster Universities Osteoarthritis Index Pain, Stiffness and Physical Functioning subscales as outcome measures. They performed Pearson correlation analysis and multiple linear regression to analyze associations between predictor and outcome variables. There are importance of pre-operative psychosocial factors in understanding outcomes of TKA. During pre-operative assessment, psychosocial factors could be considered. Future study performed on psychological interventions is required within this population to ascertain if early and one-year outcomes can be improved.