Van Meirhaeghe J, Salmon LJ, O'Sullivan M, et al. - Researchers investigated change in sleep patterns prior to and following hip (THA) and knee arthroplasty (TKA) as well as its link with Patient Reported Outcome Measures (PROMs). They gathered surgical data and PROMs, between July 2016 and June 2018, from 780 individuals prior to and 12 months post-THA or TKA. Poor quality sleep was experienced by 35% (270/780) prior to surgery. Post-arthroplasty, an improvement was reported by 74% (201/270) of those who experienced bad sleep. Participants reporting good sleep quality (626/676, 93%) vs those reporting bad sleep quality (67/86, 78%) were found to have a higher satisfaction. Overall, experts concluded that sleep quality and duration may improve following THA and TKA, and better outcome scores and satisfaction were achieved in relation to improvement in sleep quality and duration.