Costa MA, et al. - This study was attempted to ascertain whether there is a relation between preoperative sagittal alignment, based on radiographic parameters, and clinical outcomes, after lumbar decompressive procedures, in patients with lumbar spinal stenosis (LSS). Researchers recruited a total of 104 patients with LSS who had undergone lumbar decompressive procedures, between January 2016 and December 2017. They assessed preoperative spinopelvic parameters, and individuals were classified into radiological groups according to the median of the following variables: relative lumbar lordosis (measured minus ideal lumbar lordosis), relative pelvic tilt (measured minus ideal pelvic tilt), and sagittal vertical axis. The data exhibited that after decompression surgery for LSS on non-deformity patients, preoperative spinopelvic parameters did not significantly associate with clinical outcomes. It was shown that after surgery, patients had a comparable improvement, regardless of their preoperative sagittal alignment.