Clinical Research Directory

Inclusion Criteria: * All patients who are eligible for elective surgery of the lumbar spine. * All patients with degenerative disorder of the lumbar spine including: herniated disk, stenosis, discopathy and spondylolisthesis. * Patients must be able to fill in the questionnaire online * Patients with imaging (Magnetic resonance imaging (MRI)) confirmed lumbar disc herniation, stenosis, discopathy, or listhesis. * Elective cases * Patients operated with laminectomy, microscopic discectomy, percutaneous transforaminal endoscopic discectomy, and spondylodesis. Exclusion Criteria: * Patients who cannot speak nor read the Dutch language * Patients who are not able to complete the digital questionnaires, according to the including doctor * Patients with fractures, primary infections of the spine, or with spinal malignant- cies. * Patients in a traumatic setting.