Kunze KN, Rasio J, Clapp I, et al. - The present study was conducted to report the outcomes of a mid-term follow-up study on sleep quality at a minimum of two-years after hip arthroscopy for femoroacetabular impingement syndrome (FAIS). While exclusion criteria were revision arthroscopy, gluteus medius repair, a contralateral procedure during the follow-up period, and known sleep disorders, original inclusion criteria were consecutive patients undergoing primary hip arthroscopy for cam/pincer correction who failed nonoperative management between March 1, 2017, and July 1, 2017. For the follow-up, a sum of 37/55 (67.3%) was available. In sleep quality, the early improvements observed six months postoperatively from an original small cohort were maintained at a mean 2.8-year follow-up in those who responded. Nevertheless, approximately 30% of hip arthroscopy individuals still experience poor sleep quality.