Mac-Thiong JM, et al. - A sum of 61 candidates were evaluated to study the relation of surgical reduction in pelvic balance, slip grade, lumbosacral angle and L5 incidence with the quality of life after surgery. Researchers observed an association of improved mental health with a reduction to a low-grade slip. They found that the reduction in lumbosacral angle was not predictive of quality of life. A correlation between postoperative pelvic balance and the preoperative pelvic balance was reported. They noted a tendency to achieve normal pelvic balance when the postoperative L5 incidence was 60° or smaller.