Nahle IS, et al. - In this retrospective cohort study, authors studied 33 subjects with mean age 15.6 ± 3.0 years operated for L5-S1 high-grade spondylolisthesis (HGS) between July 2002 and April 2015 to quantify the consequence of a surgical reduction of lumbosacral HGS on the proximal femoral angle (PFA) and quality of life (QoL). They reported correlation between decreasing PFA and less pain (r = −0.56), improved function (r = −0.51) and better self-image (r = −0.46) postreduction. They found a decrease in PFA due to the reduction of HGS. They noticed that the reduction was also related to a better postoperative QoL when the preoperative PFA was abnormal.