Ponzio DY, Rothermel SD, Chiu YF, et al. - This study was carried out to ascertain the effect of patients' physical activity level on preoperative expectations and postoperative satisfaction and clinical outcomes in patients undergoing total hip arthroplasty (THA). Researchers retrospectively distinguished patients who had undergone unilateral primary THA for osteoarthritis and completed a preoperative Lower Extremity Activity Scale, Hospital for Special Surgery Hip Replacement Expectations Survey, and Hip disability and Osteoarthritis Outcome Score in addition to two-year Hip disability and Osteoarthritis Outcome Score and satisfaction evaluations using an institutional registry of patients undergoing THA between 2007 and 2012. Active and inactive patients were similarly satisfied and achieved comparable outcomes at 2 years following THA. In comparison with active patients, inactive patients exhibited a greater improvement in physical activity level from preoperative baseline. They found similar complications and revision rates.