Inclusion process and patient recruitment
Stenosis, foraminal stenosis, pain, Spondylolisthesis, LSS
STENOSIS, RADICULOPATHY, DEGENERATIVE, SPONDYLOLISTHESIS, STENOSIS
The included patients had MRI findings and clinical symptoms consistent with LSS, i.e., symptoms of predominantly central stenosis but not specific nerve root pain (radiculopathy). Of 2227 patients screened for eligibility at orthopedic and neurosurgical departments at 16 Norwegian public hospitals, 437 patients fulfilled the eligibility criteria and were included in NORDSTEN-SST (Fig. Flow chart of the NORDSTEN-SST investigating influence of foraminal stenosis. DST, Degenerative Spondylolisthesis Trial; SST, Spinal Stenosis TrialInclusion and exclusion criteria for the Spinal Stenosis Trial (SST) in the NORDSTEN study