Kuo, AC, Giori NJ, et al. - In this study, researchers attempted to evaluate the minimal clinically important differences in the Hip Disability and Osteoarthritis Outcome Score and in the Knee Injury and Osteoarthritis Outcome Score for veterans undergoing total hip or knee arthroplasty. Researchers performed a prospective cohort study including a total of 858 individuals who underwent total joint replacement between March 16, 2015, and March 9, 2017, at 3 high-complexity Veterans Affairs Medical Centers. They administered Self-Administered Patient Satisfaction Scale (SAPS) for primary hip or knee arthroplasty at 1-year follow-up as an anchor patient-reported outcome measure. The evidence indicated that minimal clinically important difference calculates can be highly variable depending on the method used. For the Hip disability and osteoarthritis outcome score and Knee Injury and Osteoarthritis Outcome Score patient satisfaction measured by Self-Administered Patient Satisfaction Scale (SAPS) was found to be a suitable anchor. Results indicates that the SAPS-anchored minimal clinically important difference values presented here be applied in future research of total hip arthroplasty and total knee arthroplasty for veterans.