Methods
Stenosis, degenerative spondylolisthesis, NORDSTEN, Degenerative spondylolisthesis, LSS
STENOSIS, DEGENERATIVE SPONDYLOLISTHESIS, DEGENERATIVE SPONDYLOLISTHESIS
The NORwegian Degenerative spondylolisthesis and spinal STENosis (NORDSTEN) study has three arms, two randomized controlled trials and one observational cohort with 988 included patients. NORDSTEN is a multicenter study done in collaboration with 18 Norwegian hospitals that routinely perform spine surgery and are evaluating clinical and radiological findings in patients with LSS. The patients in the present analysis are from the randomized NORDSTEN Spinal Stenosis Trial (NORDSTEN-SST), and consequently, no patients with degenerative spondylolisthesis are included [