Hirase T, Haghshenas V, Bratescu R, et al. - A retrospective cohort study was performed to ascertain the association between sarcopenia and perioperative adverse events (AEs) among patients undergoing complex revision thoracolumbar spine surgery. Researchers conducted a retrospective analysis at a single institution between May 2016 and February 2020 of patients undergoing complex revision thoracolumbar spine surgery by three board-certified fellowship-trained orthopedic spine surgeons. They included a total of 114 consecutive patients in the study. The results of this study demonstrated that sarcopenia assessed by PMI is correlated with higher perioperative AEs, 30-day readmission rates, 30-day re-operation rates, rate of discharge to a facility, and longer LOS among patients undergoing complex revision thoracolumbar spine surgery.